[reactos] 02/03: [VCDROM] Implement the virtual CD-ROM class driver. It was provided by MS as a separate package to download for Windows (up to 7). That class driver allows creating virtual drives on which we can later mount ISOs images. It's rather basic, but does the job.
3 Dec
2017
3 Dec
'17
5:18 p.m.
https://git.reactos.org/?p=reactos.git;a=commitdiff;h=6906e184bb22720e4f498…
commit 6906e184bb22720e4f498f576af96eb5b84980e2
Author: Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Sun Dec 3 18:10:32 2017 +0100
[VCDROM] Implement the virtual CD-ROM class driver.
It was provided by MS as a separate package to download for Windows (up to 7).
That class driver allows creating virtual drives on which we can later mount ISOs
images.
It's rather basic, but does the job.
To use it, you can use the GUI app from Microsoft (Virtual CD-ROM Control Panel)
or the vcdcli in CLI. We're compatible :-).
Note that it's not loaded at boot, you need to manually start it, to lower memory
footprint.
Both applications will handle this for you.
---
modules/rosapps/drivers/CMakeLists.txt | 1 +
modules/rosapps/drivers/vcdrom/CMakeLists.txt | 7 +
modules/rosapps/drivers/vcdrom/vcdioctl.h | 29 +
modules/rosapps/drivers/vcdrom/vcdrom.c | 1244 +++++++++++++++++++++++++
modules/rosapps/drivers/vcdrom/vcdrom.rc | 5 +
modules/rosapps/drivers/vcdrom/vcdrom_reg.inf | 7 +
6 files changed, 1293 insertions(+)
diff --git a/modules/rosapps/drivers/CMakeLists.txt
b/modules/rosapps/drivers/CMakeLists.txt
index 4ec7f692cd..61a8e43fcf 100644
--- a/modules/rosapps/drivers/CMakeLists.txt
+++ b/modules/rosapps/drivers/CMakeLists.txt
@@ -1 +1,2 @@
add_subdirectory(green)
+add_subdirectory(vcdrom)
diff --git a/modules/rosapps/drivers/vcdrom/CMakeLists.txt
b/modules/rosapps/drivers/vcdrom/CMakeLists.txt
new file mode 100644
index 0000000000..01df5be03c
--- /dev/null
+++ b/modules/rosapps/drivers/vcdrom/CMakeLists.txt
@@ -0,0 +1,7 @@
+
+add_library(vcdrom SHARED vcdrom.c vcdrom.rc)
+set_module_type(vcdrom kernelmodedriver)
+target_link_libraries(vcdrom ${PSEH_LIB})
+add_importlibs(vcdrom ntoskrnl hal)
+add_cd_file(TARGET vcdrom DESTINATION reactos/system32/drivers FOR all)
+add_registry_inf(vcdrom_reg.inf)
diff --git a/modules/rosapps/drivers/vcdrom/vcdioctl.h
b/modules/rosapps/drivers/vcdrom/vcdioctl.h
new file mode 100644
index 0000000000..1160016d92
--- /dev/null
+++ b/modules/rosapps/drivers/vcdrom/vcdioctl.h
@@ -0,0 +1,29 @@
+#define IOCTL_VCDROM_BASE 0x2
+#define IOCTL_VCDROM_CREATE_DRIVE CTL_CODE(IOCTL_VCDROM_BASE, 0xCC0, METHOD_BUFFERED,
FILE_ANY_ACCESS)
+#define IOCTL_VCDROM_DELETE_DRIVE CTL_CODE(IOCTL_VCDROM_BASE, 0xCC1, METHOD_BUFFERED,
FILE_ANY_ACCESS)
+#define IOCTL_VCDROM_MOUNT_IMAGE CTL_CODE(IOCTL_VCDROM_BASE, 0xCC2, METHOD_BUFFERED,
FILE_ANY_ACCESS)
+#define IOCTL_VCDROM_ENUMERATE_DRIVES CTL_CODE(IOCTL_VCDROM_BASE, 0xCC3, METHOD_BUFFERED,
FILE_ANY_ACCESS)
+#define IOCTL_VCDROM_GET_IMAGE_PATH CTL_CODE(IOCTL_VCDROM_BASE, 0xCC4, METHOD_BUFFERED,
FILE_ANY_ACCESS)
+
+typedef struct _MOUNT_PARAMETERS
+{
+ WCHAR Path[255];
+ USHORT Length;
+ ULONG Flags;
+} MOUNT_PARAMETERS, *PMOUNT_PARAMETERS;
+
+#define MOUNT_FLAG_SUPP_UDF 0x1
+#define MOUNT_FLAG_SUPP_JOLIET 0x2
+
+typedef struct _DRIVES_LIST
+{
+ USHORT Count;
+ WCHAR Drives[26];
+} DRIVES_LIST, *PDRIVES_LIST;
+
+typedef struct _IMAGE_PATH
+{
+ WCHAR Path[255];
+ USHORT Length;
+ USHORT Mounted;
+} IMAGE_PATH, *PIMAGE_PATH;
diff --git a/modules/rosapps/drivers/vcdrom/vcdrom.c
b/modules/rosapps/drivers/vcdrom/vcdrom.c
new file mode 100644
index 0000000000..d37d91a0d0
--- /dev/null
+++ b/modules/rosapps/drivers/vcdrom/vcdrom.c
@@ -0,0 +1,1244 @@
+/*
+ * COPYRIGHT: See COPYING in the top level directory
+ * PROJECT: ReactOS FS utility tool
+ * FILE: modules/rosapps/drivers/vcdrom/vcdrom.c
+ * PURPOSE: Virtual CD-ROM class driver
+ * PROGRAMMERS: Pierre Schweitzer <pierre(a)reactos.org>
+ */
+
+#include <ntddk.h>
+#include <ntifs.h>
+#include <ntdddisk.h>
+#include <ntddcdrm.h>
+#include <pseh/pseh2.h>
+
+#define NDEBUG
+#include <debug.h>
+
+#include "vcdioctl.h"
+
+typedef struct _DEVICE_EXTENSION
+{
+ PDEVICE_OBJECT DeviceObject;
+ /* File object to the ISO when opened */
+ PFILE_OBJECT VolumeObject;
+ /* Size of the ISO */
+ LARGE_INTEGER VolumeSize;
+ /* Mandatory change count for verify */
+ ULONG ChangeCount;
+ /* Will contain the device name or the drive letter */
+ UNICODE_STRING GlobalName;
+ /* Will contain the image path */
+ UNICODE_STRING ImageName;
+ /* Flags on mount (supp. of UDF/Joliet) */
+ ULONG Flags;
+ /* Faking CD structure */
+ ULONG SectorSize;
+ ULONG SectorShift;
+} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
+
+/* Taken from CDFS */
+#define TOC_DATA_TRACK 0x04
+#define TOC_LAST_TRACK 0xaa
+
+/* Should cover most of our usages */
+#define DEFAULT_STRING_SIZE 50
+
+/* Increment on device creation, protection by the mutex */
+FAST_MUTEX ViMutex;
+ULONG ViDevicesCount;
+
+VOID
+ViInitializeDeviceExtension(PDEVICE_OBJECT DeviceObject)
+{
+ PDEVICE_EXTENSION DeviceExtension;
+
+ DeviceExtension = DeviceObject->DeviceExtension;
+
+ /* Zero mandatory fields, the rest will be zeroed when needed */
+ DeviceExtension->DeviceObject = DeviceObject;
+ DeviceExtension->VolumeObject = NULL;
+ DeviceExtension->ChangeCount = 0;
+ DeviceExtension->GlobalName.Buffer = NULL;
+ DeviceExtension->GlobalName.MaximumLength = 0;
+ DeviceExtension->GlobalName.Length = 0;
+ DeviceExtension->ImageName.Buffer = NULL;
+ DeviceExtension->ImageName.MaximumLength = 0;
+ DeviceExtension->ImageName.Length = 0;
+}
+
+NTSTATUS
+ViAllocateUnicodeString(USHORT BufferLength, PUNICODE_STRING UnicodeString)
+{
+ PVOID Buffer;
+
+ /* Allocate the buffer */
+ Buffer = ExAllocatePoolWithTag(NonPagedPool, BufferLength, ' dCV');
+ /* Initialize */
+ UnicodeString->Length = 0;
+ UnicodeString->MaximumLength = BufferLength;
+ UnicodeString->Buffer = Buffer;
+
+ /* Return success if it went fine */
+ if (Buffer != NULL)
+ {
+ return STATUS_SUCCESS;
+ }
+
+ return STATUS_NO_MEMORY;
+}
+
+VOID
+ViFreeUnicodeString(PUNICODE_STRING UnicodeString)
+{
+ /* Only free if allocate, that allows using this
+ * on cleanup in short memory situations
+ */
+ if (UnicodeString->Buffer != NULL)
+ {
+ ExFreePoolWithTag(UnicodeString->Buffer, 0);
+ UnicodeString->Buffer = NULL;
+ }
+
+ /* Zero the rest */
+ UnicodeString->Length = 0;
+ UnicodeString->MaximumLength = 0;
+}
+
+NTSTATUS
+ViSetIoStatus(NTSTATUS Status, ULONG_PTR Information, PIRP Irp)
+{
+ /* Only set what we got */
+ Irp->IoStatus.Information = Information;
+ Irp->IoStatus.Status = Status;
+
+ /* And return the status, so that caller can return with us */
+ return Status;
+}
+
+NTSTATUS
+NTAPI
+VcdHandle(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ /* Stub for CREATE, CLEANUP, CLOSE, always a succes */
+ ViSetIoStatus(STATUS_SUCCESS, 0, Irp);
+ IoCompleteRequest(Irp, IO_DISK_INCREMENT);
+
+ return STATUS_SUCCESS;
+}
+
+NTSTATUS
+ViDeleteDevice(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ NTSTATUS Status;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ DeviceExtension = DeviceObject->DeviceExtension;
+
+ /* Delete the drive letter */
+ Status = IoDeleteSymbolicLink(&DeviceExtension->GlobalName);
+ ViFreeUnicodeString(&DeviceExtension->GlobalName);
+
+ /* Close the ISO */
+ if (DeviceExtension->VolumeObject != NULL)
+ {
+ ObDereferenceObject(DeviceExtension->VolumeObject);
+ DeviceExtension->VolumeObject = NULL;
+ }
+
+ /* Free the ISO name */
+ ViFreeUnicodeString(&DeviceExtension->ImageName);
+
+ /* And delete the device */
+ IoDeleteDevice(DeviceObject);
+ return ViSetIoStatus(Status, 0, Irp);
+}
+
+VOID
+NTAPI
+VcdUnload(PDRIVER_OBJECT DriverObject)
+{
+ IRP FakeIrp;
+ PDEVICE_OBJECT DeviceObject;
+
+ /* No device, nothing to free */
+ DeviceObject = DriverObject->DeviceObject;
+ if (DeviceObject == NULL)
+ {
+ return;
+ }
+
+ /* Delete any device we could have created */
+ do
+ {
+ PDEVICE_OBJECT NextDevice;
+
+ NextDevice = DeviceObject->NextDevice;
+ /* This is normally called on IoCtl, so fake
+ * the IRP so that status can be dummily set
+ */
+ ViDeleteDevice(DeviceObject, &FakeIrp);
+ DeviceObject = NextDevice;
+ } while (DeviceObject != NULL);
+}
+
+NTSTATUS
+ViCreateDriveLetter(PDRIVER_OBJECT DriverObject, WCHAR Letter, WCHAR *EffectiveLetter,
PDEVICE_OBJECT *DeviceObject)
+{
+ NTSTATUS Status;
+ HANDLE LinkHandle;
+ WCHAR DriveLetter[3], CurLetter;
+ PDEVICE_OBJECT LocalDeviceObject;
+ PDEVICE_EXTENSION DeviceExtension;
+ OBJECT_ATTRIBUTES ObjectAttributes;
+ UNICODE_STRING DeviceCount, DeviceName;
+
+ *DeviceObject = NULL;
+
+ /* Allocate our buffers */
+ ViAllocateUnicodeString(DEFAULT_STRING_SIZE, &DeviceCount);
+ ViAllocateUnicodeString(DEFAULT_STRING_SIZE, &DeviceName);
+
+ /* For easier cleanup */
+ _SEH2_TRY
+ {
+ /* Get our device number */
+ ExAcquireFastMutex(&ViMutex);
+ Status = RtlIntegerToUnicodeString(ViDevicesCount, 10, &DeviceCount);
+ ++ViDevicesCount;
+ ExReleaseFastMutex(&ViMutex);
+
+ /* Conversion to string failed, bail out */
+ if (!NT_SUCCESS(Status))
+ {
+ _SEH2_LEAVE;
+ }
+
+ /* Create our device name */
+ Status = RtlAppendUnicodeToString(&DeviceName,
L"\\Device\\VirtualCdRom");
+ if (!NT_SUCCESS(Status))
+ {
+ _SEH2_LEAVE;
+ }
+
+ Status = RtlAppendUnicodeStringToString(&DeviceName, &DeviceCount);
+ if (!NT_SUCCESS(Status))
+ {
+ _SEH2_LEAVE;
+ }
+
+ /* And create the device! */
+ Status = IoCreateDevice(DriverObject, sizeof(DEVICE_EXTENSION), &DeviceName,
+ FILE_DEVICE_CD_ROM,
+ FILE_READ_ONLY_DEVICE | FILE_FLOPPY_DISKETTE,
+ FALSE, &LocalDeviceObject);
+ if (!NT_SUCCESS(Status))
+ {
+ _SEH2_LEAVE;
+ }
+
+ /* Initialize our DE */
+ ViInitializeDeviceExtension(LocalDeviceObject);
+ DeviceExtension = LocalDeviceObject->DeviceExtension;
+ ViAllocateUnicodeString(DEFAULT_STRING_SIZE,
&DeviceExtension->GlobalName);
+
+ /* Now, we'll try to find a free drive letter
+ * We always start from Z and go backward
+ */
+ for (CurLetter = Letter; CurLetter >= 'A'; CurLetter--)
+ {
+ /* By default, no flags. These will be set
+ * on mount, by the caller
+ */
+ DeviceExtension->Flags = 0;
+
+ /* Create a drive letter name */
+ DeviceExtension->GlobalName.Length = 0;
+ Status = RtlAppendUnicodeToString(&DeviceExtension->GlobalName,
L"\\??\\");
+ if (!NT_SUCCESS(Status))
+ {
+ _SEH2_LEAVE;
+ }
+
+ DriveLetter[0] = CurLetter;
+ DriveLetter[1] = L':';
+ DriveLetter[2] = UNICODE_NULL;
+ Status = RtlAppendUnicodeToString(&DeviceExtension->GlobalName,
DriveLetter);
+ if (!NT_SUCCESS(Status))
+ {
+ _SEH2_LEAVE;
+ }
+
+ /* And try to open it */
+ InitializeObjectAttributes(&ObjectAttributes,
&DeviceExtension->GlobalName, OBJ_CASE_INSENSITIVE | OBJ_PERMANENT, NULL, NULL);
+ Status = ZwOpenSymbolicLinkObject(&LinkHandle, GENERIC_READ,
&ObjectAttributes);
+ /* It failed; good news, that letter is free, jump on it! */
+ if (!NT_SUCCESS(Status))
+ {
+ /* Create a symbolic link to our device */
+ Status = IoCreateSymbolicLink(&DeviceExtension->GlobalName,
&DeviceName);
+ /* If created... */
+ if (NT_SUCCESS(Status))
+ {
+ /* Return the drive letter to the caller */
+ *EffectiveLetter = CurLetter;
+ ClearFlag(LocalDeviceObject->Flags, DO_DEVICE_INITIALIZING);
+ /* No caching! */
+ SetFlag(LocalDeviceObject->Flags, DO_DIRECT_IO);
+
+ /* And return the DO */
+ *DeviceObject = LocalDeviceObject;
+ break;
+ }
+ }
+ /* This letter is taken, try another one */
+ else
+ {
+ ZwClose(LinkHandle);
+ Status = STATUS_OBJECT_NAME_EXISTS;
+ }
+ }
+
+ /* We're out of drive letters, so fail :-( */
+ if (CurLetter == (L'A' - 1))
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ }
+ }
+ _SEH2_FINALLY
+ {
+ /* No longer need these */
+ ViFreeUnicodeString(&DeviceName);
+ ViFreeUnicodeString(&DeviceCount);
+
+ /* And delete in case of a failure */
+ if (!NT_SUCCESS(Status) && Status != STATUS_VERIFY_REQUIRED &&
LocalDeviceObject != NULL)
+ {
+ IoDeleteDevice(LocalDeviceObject);
+ }
+ }
+ _SEH2_END;
+
+ return Status;
+}
+
+NTSTATUS
+ViMountImage(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING Image)
+{
+ NTSTATUS Status;
+ HANDLE ImgHandle;
+ IO_STATUS_BLOCK IoStatus;
+ ULONG Buffer[2], i, SectorShift;
+ PDEVICE_EXTENSION DeviceExtension;
+ OBJECT_ATTRIBUTES ObjectAttributes;
+ FILE_STANDARD_INFORMATION FileStdInfo;
+
+ /* Try to open the image */
+ InitializeObjectAttributes(&ObjectAttributes, Image, OBJ_CASE_INSENSITIVE, NULL,
NULL);
+ Status = ZwCreateFile(&ImgHandle, FILE_READ_DATA | SYNCHRONIZE,
&ObjectAttributes,
+ &IoStatus, NULL, FILE_ATTRIBUTE_NORMAL, FILE_SHARE_READ,
+ FILE_OPEN, FILE_SYNCHRONOUS_IO_NONALERT, NULL, 0);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Failed to open image: %wZ\n", Image);
+ return Status;
+ }
+
+ /* Query its information */
+ Status = ZwQueryInformationFile(ImgHandle, &IoStatus, &FileStdInfo,
+ sizeof(FileStdInfo), FileStandardInformation);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Failed to query image information\n");
+ ZwClose(ImgHandle);
+ return Status;
+ }
+
+ /* Set image size */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ DeviceExtension->VolumeSize.QuadPart = FileStdInfo.EndOfFile.QuadPart;
+
+ /* Read the first 8-bytes to determine our sector size */
+ Status = ZwReadFile(ImgHandle, NULL, NULL, NULL, &IoStatus, Buffer,
sizeof(Buffer), NULL, NULL);
+ if (!NT_SUCCESS(Status) || Buffer[1] == 0 || (Buffer[1] & 0x1FF) != 0)
+ {
+ DeviceExtension->SectorSize = 2048;
+ }
+ else
+ {
+ DeviceExtension->SectorSize = Buffer[1];
+ }
+
+ /* Now, compute the sector shift */
+ if (DeviceExtension->SectorSize == 512)
+ {
+ DeviceExtension->SectorShift = 9;
+ }
+ else
+ {
+ for (i = 512, SectorShift = 9; i < DeviceExtension->SectorSize; i = i * 2,
++SectorShift);
+ if (i == DeviceExtension->SectorSize)
+ {
+ DeviceExtension->SectorShift = SectorShift;
+ }
+ else
+ {
+ DeviceExtension->SectorShift = 11;
+ }
+ }
+
+ /* We're good, get the image file object to close the handle */
+ Status = ObReferenceObjectByHandle(ImgHandle, 0, NULL, KernelMode,
+ (PVOID *)&DeviceExtension->VolumeObject,
NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ ZwClose(ImgHandle);
+ DeviceExtension->VolumeObject = NULL;
+ return Status;
+ }
+
+ ZwClose(ImgHandle);
+ /* Increase change count to force a verify */
+ ++DeviceExtension->ChangeCount;
+
+ /* And ask for a verify! */
+ SetFlag(DeviceObject->Flags, DO_VERIFY_VOLUME);
+
+ /* Free old string (if any) */
+ ViFreeUnicodeString(&DeviceExtension->ImageName);
+ /* And save our new image name */
+ ViAllocateUnicodeString(Image->MaximumLength,
&DeviceExtension->ImageName);
+ RtlCopyUnicodeString(&DeviceExtension->ImageName, Image);
+
+ return STATUS_SUCCESS;
+}
+
+VOID
+ViCreateDriveAndMountImage(PDRIVER_OBJECT DriverObject, WCHAR Letter, LPCWSTR ImagePath)
+{
+ UNICODE_STRING Image;
+ WCHAR EffectiveLetter;
+ PDEVICE_OBJECT DeviceObject;
+
+ /* Create string from path */
+ DeviceObject = NULL;
+ RtlInitUnicodeString(&Image, ImagePath);
+
+ /* Create the drive letter (ignore output, it comes from registry, nothing to do */
+ ViCreateDriveLetter(DriverObject, Letter, &EffectiveLetter, &DeviceObject);
+ /* And mount the image on the created drive */
+ ViMountImage(DeviceObject, &Image);
+}
+
+VOID
+ViLoadImagesFromRegistry(PDRIVER_OBJECT DriverObject, LPCWSTR RegistryPath)
+{
+ WCHAR Letter[2];
+ WCHAR PathBuffer[100], ResBuffer[100];
+
+ /* We'll browse the registry for
+ * DeviceX\IMAGE = {Path}
+ * When found, we create (or at least, attempt to)
+ * device X: and mount image Path
+ */
+ Letter[0] = L'A';
+ Letter[1] = UNICODE_NULL;
+ do
+ {
+ NTSTATUS Status;
+ UNICODE_STRING Path, ResString;
+ RTL_QUERY_REGISTRY_TABLE QueryTable[3];
+
+ /* Our path is always Device + drive letter */
+ RtlZeroMemory(PathBuffer, sizeof(PathBuffer));
+ Path.Buffer = PathBuffer;
+ Path.Length = 0;
+ Path.MaximumLength = sizeof(PathBuffer);
+ RtlAppendUnicodeToString(&Path, L"Parameters\\Device");
+ RtlAppendUnicodeToString(&Path, Letter);
+
+ ResString.Buffer = ResBuffer;
+ ResString.Length = 0;
+ ResString.MaximumLength = sizeof(ResBuffer);
+
+ RtlZeroMemory(&QueryTable[0], sizeof(QueryTable));
+ QueryTable[0].Name = Path.Buffer;
+ QueryTable[0].Flags = RTL_QUERY_REGISTRY_SUBKEY;
+ QueryTable[1].Name = L"IMAGE";
+ QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT;
+ QueryTable[1].EntryContext = &ResString;
+
+ /* If query went fine, attempt to create and mount */
+ Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE, RegistryPath, QueryTable,
NULL, NULL);
+ if (NT_SUCCESS(Status))
+ {
+ ViCreateDriveAndMountImage(DriverObject, Letter[0], ResString.Buffer);
+ }
+
+ ++(Letter[0]);
+ } while (Letter[0] <= L'Z');
+}
+
+NTSTATUS
+ViVerifyVolume(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ /* Force verify */
+ SetFlag(DeviceObject->Flags, DO_VERIFY_VOLUME);
+
+ Irp->IoStatus.Information = 0;
+ Irp->IoStatus.Status = STATUS_VERIFY_REQUIRED;
+
+ IoSetHardErrorOrVerifyDevice(Irp, DeviceObject);
+
+ return STATUS_VERIFY_REQUIRED;
+}
+
+NTSTATUS
+ViReadFile(PFILE_OBJECT File, PMDL Mdl, PLARGE_INTEGER Offset, PKEVENT Event, ULONG
Length, PIO_STATUS_BLOCK IoStatusBlock)
+{
+ PIRP LowerIrp;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_OBJECT DeviceObject;
+
+ /* Get the lower DO */
+ DeviceObject = IoGetRelatedDeviceObject(File);
+ /* Allocate an IRP to deal with it */
+ LowerIrp = IoAllocateIrp(DeviceObject->StackSize, 0);
+ if (LowerIrp == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ /* Initialize it */
+ LowerIrp->RequestorMode = KernelMode;
+ /* Our status block */
+ LowerIrp->UserIosb = IoStatusBlock;
+ LowerIrp->MdlAddress = Mdl;
+ /* We don't cache! */
+ LowerIrp->Flags = IRP_NOCACHE | IRP_PAGING_IO | IRP_SYNCHRONOUS_PAGING_IO;
+ /* Sync event for us to know when read is done */
+ LowerIrp->UserEvent = Event;
+ LowerIrp->UserBuffer = (PVOID)((ULONG_PTR)Mdl->StartVa + Mdl->ByteOffset);
+ /* The FO of our image */
+ LowerIrp->Tail.Overlay.OriginalFileObject = File;
+ LowerIrp->Tail.Overlay.Thread = PsGetCurrentThread();
+
+ /* We basically perform a read operation, nothing complex here */
+ Stack = IoGetNextIrpStackLocation(LowerIrp);
+ Stack->Parameters.Read.Length = Length;
+ Stack->MajorFunction = IRP_MJ_READ;
+ Stack->FileObject = File;
+ Stack->Parameters.Read.ByteOffset.QuadPart = Offset->QuadPart;
+
+ /* And call lower driver */
+ return IoCallDriver(DeviceObject, LowerIrp);
+}
+
+NTSTATUS
+NTAPI
+VcdRead(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ KEVENT Event;
+ NTSTATUS Status;
+ IO_STATUS_BLOCK IoStatus;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* Catch any exception that could happen during read attempt */
+ _SEH2_TRY
+ {
+ /* First of all, check if there's an image mounted */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject == NULL)
+ {
+ Status = ViSetIoStatus(STATUS_NO_MEDIA_IN_DEVICE, 0, Irp);
+ _SEH2_LEAVE;
+ }
+
+ /* Check if volume has to be verified (or if we override, for instance
+ * FSD performing initial reads for mouting FS)
+ */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (BooleanFlagOn(DeviceObject->Flags, DO_VERIFY_VOLUME) &&
+ !BooleanFlagOn(Stack->Flags, SL_OVERRIDE_VERIFY_VOLUME))
+ {
+ Status = ViVerifyVolume(DeviceObject, Irp);
+ _SEH2_LEAVE;
+ }
+
+ /* Check if we have enough room for output */
+ if (Stack->Parameters.Read.Length > Irp->MdlAddress->ByteCount)
+ {
+ Status = ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, 0, Irp);
+ _SEH2_LEAVE;
+ }
+
+ /* Initialize our event */
+ KeInitializeEvent(&Event, NotificationEvent, FALSE);
+
+ /* Perform actual read */
+ Status = ViReadFile(DeviceExtension->VolumeObject, Irp->MdlAddress,
+ &Stack->Parameters.Read.ByteOffset, &Event,
+ Stack->Parameters.Read.Length, &IoStatus);
+ if (!NT_SUCCESS(Status))
+ {
+ Status = ViSetIoStatus(Status, 0, Irp);
+ _SEH2_LEAVE;
+ }
+
+ /* Make sure we wait until its done */
+ Status = KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ Status = ViSetIoStatus(Status, 0, Irp);
+ _SEH2_LEAVE;
+ }
+
+ /* Look whether we're reading first bytes of the volume, if so, our
+ * "suppression" might be asked for
+ */
+ if (Stack->Parameters.Read.ByteOffset.QuadPart /
DeviceExtension->SectorSize < 0x20)
+ {
+ /* Check our output buffer is in a state where we can play with it */
+ if ((Irp->MdlAddress->MdlFlags & (MDL_ALLOCATED_FIXED_SIZE |
MDL_PAGES_LOCKED | MDL_MAPPED_TO_SYSTEM_VA)) ==
+ (MDL_ALLOCATED_FIXED_SIZE | MDL_PAGES_LOCKED | MDL_MAPPED_TO_SYSTEM_VA))
+ {
+ PUCHAR Buffer;
+
+ /* Do we have to delete any UDF mark? */
+ if (BooleanFlagOn(DeviceExtension->Flags, MOUNT_FLAG_SUPP_UDF))
+ {
+ /* Kill any NSR0X mark from UDF */
+ Buffer = (PUCHAR)((ULONG_PTR)Irp->MdlAddress->StartVa +
Irp->MdlAddress->ByteOffset);
+ if (Buffer != NULL)
+ {
+ if (Buffer[0] == 0 && Buffer[1] == 'N' &&
Buffer[2] == 'S' &&
+ Buffer[3] == 'R' && Buffer[4] ==
'0')
+ {
+ Buffer[5] = '0';
+ }
+ }
+ }
+
+ /* Do we have to delete any Joliet mark? */
+ if (BooleanFlagOn(DeviceExtension->Flags, MOUNT_FLAG_SUPP_JOLIET))
+ {
+ /* Kill the CD001 mark from Joliet */
+ Buffer = (PUCHAR)((ULONG_PTR)Irp->MdlAddress->StartVa +
Irp->MdlAddress->ByteOffset);
+ if (Buffer != NULL)
+ {
+ if (Buffer[0] == 2 && Buffer[1] == 'C' &&
Buffer[2] == 'D' &&
+ Buffer[3] == '0' && Buffer[4] == '0'
&& Buffer[5] == '1')
+ {
+ Buffer[5] = '0';
+ }
+ }
+ }
+ }
+ }
+
+ /* Set status */
+ Status = ViSetIoStatus(Status, Stack->Parameters.Read.Length, Irp);
+ }
+ _SEH2_FINALLY
+ {
+ /* And complete! */
+ IoCompleteRequest(Irp, IO_DISK_INCREMENT);
+ } _SEH2_END;
+
+ return Status;
+}
+
+NTSTATUS
+ViCreateDevice(PDRIVER_OBJECT DriverObject, PIRP Irp)
+{
+ NTSTATUS Status;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_OBJECT DeviceObject;
+
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+
+ /* Make sure output buffer is big enough to receive the drive letter
+ * when we create the drive
+ */
+ if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(WCHAR))
+ {
+ return ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, sizeof(WCHAR), Irp);
+ }
+
+ /* And start creation. We always start from bottom */
+ Status = ViCreateDriveLetter(DriverObject, L'Z',
Irp->AssociatedIrp.SystemBuffer, &DeviceObject);
+ return ViSetIoStatus(Status, sizeof(WCHAR), Irp);
+}
+
+NTSTATUS
+ViGetDriveGeometry(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ PDISK_GEOMETRY DiskGeo;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* No geometry if no image mounted */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject == NULL)
+ {
+ return ViSetIoStatus(STATUS_NO_MEDIA_IN_DEVICE, 0, Irp);
+ }
+
+ /* No geometry if volume is to be verified */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (BooleanFlagOn(DeviceObject->Flags, DO_VERIFY_VOLUME) &&
+ !BooleanFlagOn(Stack->Flags, SL_OVERRIDE_VERIFY_VOLUME))
+ {
+ return ViVerifyVolume(DeviceObject, Irp);
+ }
+
+ /* No geometry if too small output buffer */
+ if (Stack->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(DISK_GEOMETRY))
+ {
+ return ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, sizeof(DISK_GEOMETRY), Irp);
+ }
+
+ /* Finally, set what we're asked for */
+ DiskGeo = Irp->AssociatedIrp.SystemBuffer;
+ DiskGeo->MediaType = RemovableMedia;
+ DiskGeo->BytesPerSector = DeviceExtension->SectorSize;
+ DiskGeo->SectorsPerTrack = DeviceExtension->VolumeSize.QuadPart >>
DeviceExtension->SectorShift;
+ DiskGeo->Cylinders.QuadPart = 1;
+ DiskGeo->TracksPerCylinder = 1;
+
+ return ViSetIoStatus(STATUS_SUCCESS, sizeof(DISK_GEOMETRY), Irp);
+}
+
+NTSTATUS
+ViCheckVerify(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ PULONG Buffer;
+ ULONG_PTR Information;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* Nothing to verify if no mounted */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject == NULL)
+ {
+ return ViSetIoStatus(STATUS_NO_MEDIA_IN_DEVICE, 0, Irp);
+ }
+
+ /* Do we have to verify? */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (BooleanFlagOn(DeviceObject->Flags, DO_VERIFY_VOLUME) &&
+ !BooleanFlagOn(Stack->Flags, SL_OVERRIDE_VERIFY_VOLUME))
+ {
+ return ViSetIoStatus(STATUS_VERIFY_REQUIRED, 0, Irp);
+ }
+
+ /* If caller provided a buffer, that's to get the change count */
+ Buffer = Irp->AssociatedIrp.SystemBuffer;
+ if (Buffer != NULL)
+ {
+ *Buffer = DeviceExtension->ChangeCount;
+ Information = sizeof(ULONG);
+ }
+ else
+ {
+ Information = 0;
+ }
+
+ /* Done */
+ return ViSetIoStatus(STATUS_SUCCESS, Information, Irp);
+}
+
+NTSTATUS
+ViIssueMountImage(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING Image, PIRP Irp)
+{
+ NTSTATUS Status;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* We cannot mount an image if there's already one mounted */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject != NULL)
+ {
+ return ViSetIoStatus(STATUS_DEVICE_NOT_READY, 0, Irp);
+ }
+
+ /* Perform the mount */
+ Status = ViMountImage(DeviceObject, Image);
+ return ViSetIoStatus(Status, 0, Irp);
+}
+
+ULONG
+ViComputeAddress(ULONG Address)
+{
+ UCHAR Local[4];
+
+ /* Convert LBA to MSF */
+ Local[0] = 0;
+ Local[1] = Address / 4500;
+ Local[2] = Address % 4500 / 75;
+ Local[3] = Address + 108 * Local[1] - 75 * Local[2];
+
+ return *(ULONG *)(&Local[0]);
+}
+
+VOID
+ViFillInTrackData(PTRACK_DATA TrackData, UCHAR Control, UCHAR Adr, UCHAR TrackNumber,
ULONG Address)
+{
+ /* Fill in our track data with provided information */
+ TrackData->Reserved = 0;
+ TrackData->Reserved1 = 0;
+ TrackData->Control = Control & 0xF;
+ TrackData->Adr = Adr;
+ TrackData->TrackNumber = TrackNumber;
+ *(ULONG *)(&TrackData->Address[0]) = ViComputeAddress(Address);
+}
+
+NTSTATUS
+ViReadToc(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ PCDROM_TOC Toc;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* No image mounted, no TOC */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject == NULL)
+ {
+ return ViSetIoStatus(STATUS_NO_MEDIA_IN_DEVICE, 0, Irp);
+ }
+
+ /* No TOC if we have to verify */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (BooleanFlagOn(DeviceObject->Flags, DO_VERIFY_VOLUME) &&
+ !BooleanFlagOn(Stack->Flags, SL_OVERRIDE_VERIFY_VOLUME))
+ {
+ return ViVerifyVolume(DeviceObject, Irp);
+ }
+
+ /* Check we have enough room for TOC */
+ if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(CDROM_TOC))
+ {
+ return ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, sizeof(CDROM_TOC), Irp);
+ }
+
+ /* Start filling the TOC */
+ Toc = Irp->AssociatedIrp.SystemBuffer;
+ Toc->Length[0] = 0;
+ Toc->Length[1] = 8;
+ Toc->FirstTrack = 1;
+ Toc->LastTrack = 1;
+ /* And fill our single (an ISO file always have a single track) track with 2sec gap
*/
+ ViFillInTrackData(Toc->TrackData, TOC_DATA_TRACK, ADR_NO_MODE_INFORMATION, 1,
150);
+ /* And add last track termination */
+ ViFillInTrackData(&Toc->TrackData[1], TOC_DATA_TRACK, ADR_NO_MODE_INFORMATION,
TOC_LAST_TRACK, (DeviceExtension->VolumeSize.QuadPart >>
DeviceExtension->SectorShift) + 150);
+
+ return ViSetIoStatus(STATUS_SUCCESS, sizeof(CDROM_TOC), Irp);
+}
+
+NTSTATUS
+ViReadTocEx(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ PCDROM_TOC Toc;
+ PIO_STACK_LOCATION Stack;
+ PCDROM_READ_TOC_EX TocEx;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* No image mounted, no TOC */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject == NULL)
+ {
+ return ViSetIoStatus(STATUS_NO_MEDIA_IN_DEVICE, 0, Irp);
+ }
+
+ /* No TOC if we have to verify */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (BooleanFlagOn(DeviceObject->Flags, DO_VERIFY_VOLUME) &&
+ !BooleanFlagOn(Stack->Flags, SL_OVERRIDE_VERIFY_VOLUME))
+ {
+ return ViVerifyVolume(DeviceObject, Irp);
+ }
+
+ /* We need an input buffer */
+ if (Stack->Parameters.DeviceIoControl.InputBufferLength <
sizeof(CDROM_READ_TOC_EX))
+ {
+ return ViSetIoStatus(STATUS_INFO_LENGTH_MISMATCH, sizeof(CDROM_READ_TOC_EX),
Irp);
+ }
+
+ /* Validate output buffer is big enough */
+ if (Stack->Parameters.DeviceIoControl.OutputBufferLength < MAXIMUM_CDROM_SIZE)
+ {
+ return ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, MAXIMUM_CDROM_SIZE, Irp);
+ }
+
+ /* Validate the input buffer - see cdrom_new */
+ TocEx = Irp->AssociatedIrp.SystemBuffer;
+ if ((TocEx->Reserved1 != 0) || (TocEx->Reserved2 != 0) ||
+ (TocEx->Reserved3 != 0))
+ {
+ return ViSetIoStatus(STATUS_INVALID_PARAMETER, 0, Irp);
+ }
+
+ if (((TocEx->Format == CDROM_READ_TOC_EX_FORMAT_SESSION) ||
+ (TocEx->Format == CDROM_READ_TOC_EX_FORMAT_PMA) ||
+ (TocEx->Format == CDROM_READ_TOC_EX_FORMAT_ATIP)) &&
+ TocEx->SessionTrack != 0)
+ {
+ return ViSetIoStatus(STATUS_INVALID_PARAMETER, 0, Irp);
+ }
+
+ if ((TocEx->Format != CDROM_READ_TOC_EX_FORMAT_TOC) &&
+ (TocEx->Format != CDROM_READ_TOC_EX_FORMAT_FULL_TOC) &&
+ (TocEx->Format != CDROM_READ_TOC_EX_FORMAT_CDTEXT) &&
+ (TocEx->Format != CDROM_READ_TOC_EX_FORMAT_SESSION) &&
+ (TocEx->Format != CDROM_READ_TOC_EX_FORMAT_PMA) &&
+ (TocEx->Format == CDROM_READ_TOC_EX_FORMAT_ATIP))
+ {
+ return ViSetIoStatus(STATUS_INVALID_PARAMETER, 0, Irp);
+ }
+
+ /* Start filling the TOC */
+ Toc = Irp->AssociatedIrp.SystemBuffer;
+ Toc->Length[0] = 0;
+ Toc->Length[1] = 8;
+ Toc->FirstTrack = 1;
+ Toc->LastTrack = 1;
+ /* And fill our single (an ISO file always have a single track) track with 2sec gap
*/
+ ViFillInTrackData(Toc->TrackData, TOC_DATA_TRACK, ADR_NO_MODE_INFORMATION, 1,
150);
+ /* And add last track termination */
+ ViFillInTrackData(&Toc->TrackData[1], TOC_DATA_TRACK, ADR_NO_MODE_INFORMATION,
TOC_LAST_TRACK, (DeviceExtension->VolumeSize.QuadPart >>
DeviceExtension->SectorShift) + 150);
+
+ return ViSetIoStatus(STATUS_SUCCESS, MAXIMUM_CDROM_SIZE, Irp);
+}
+
+NTSTATUS
+ViGetLastSession(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+
+ PIO_STACK_LOCATION Stack;
+ PCDROM_TOC_SESSION_DATA Toc;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* No image, no last session */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject == NULL)
+ {
+ return ViSetIoStatus(STATUS_NO_MEDIA_IN_DEVICE, 0, Irp);
+ }
+
+ /* No last session if we have to verify */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (BooleanFlagOn(DeviceObject->Flags, DO_VERIFY_VOLUME) &&
+ !BooleanFlagOn(Stack->Flags, SL_OVERRIDE_VERIFY_VOLUME))
+ {
+ return ViVerifyVolume(DeviceObject, Irp);
+ }
+
+ /* Check we have enough room for last session data */
+ if (Stack->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(CDROM_TOC_SESSION_DATA))
+ {
+ return ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, sizeof(CDROM_TOC_SESSION_DATA),
Irp);
+ }
+
+ /* Fill in data */
+ Toc = Irp->AssociatedIrp.SystemBuffer;
+ Toc->Length[0] = 0;
+ Toc->Length[1] = 8;
+ Toc->FirstCompleteSession = 1;
+ Toc->LastCompleteSession = 1;
+ /* And return our track with 2sec gap (cf TOC function) */
+ ViFillInTrackData(Toc->TrackData, TOC_DATA_TRACK, ADR_NO_MODE_INFORMATION, 1,
150);
+
+ return ViSetIoStatus(STATUS_SUCCESS, sizeof(CDROM_TOC_SESSION_DATA), Irp);
+}
+
+NTSTATUS
+ViEnumerateDrives(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ PDRIVES_LIST DrivesList;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_OBJECT CurrentDO;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* Check we have enough room for output */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (Stack->Parameters.DeviceIoControl.OutputBufferLength <
sizeof(DRIVES_LIST))
+ {
+ return ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, sizeof(DRIVES_LIST), Irp);
+ }
+
+ /* Get the output buffer */
+ DrivesList = Irp->AssociatedIrp.SystemBuffer;
+ DrivesList->Count = 0;
+
+ /* And now, starting from our main DO, start browsing all the DO we created */
+ for (CurrentDO = DeviceObject->DriverObject->DeviceObject; CurrentDO != NULL;
+ CurrentDO = CurrentDO->NextDevice)
+ {
+ /* Check we won't output our main DO */
+ DeviceExtension = CurrentDO->DeviceExtension;
+ if (DeviceExtension->GlobalName.Length !=
+ RtlCompareMemory(DeviceExtension->GlobalName.Buffer,
+ L"\\??\\VirtualCdRom",
+ DeviceExtension->GlobalName.Length))
+ {
+ /* When we return, we extract the drive letter
+ * See ViCreateDriveLetter(), it's \??\Z:
+ */
+ DrivesList->Drives[DrivesList->Count++] =
DeviceExtension->GlobalName.Buffer[4];
+ }
+ }
+
+ return ViSetIoStatus(STATUS_SUCCESS, sizeof(DRIVES_LIST), Irp);
+}
+
+NTSTATUS
+ViGetImagePath(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ PIMAGE_PATH ImagePath;
+ PIO_STACK_LOCATION Stack;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* Check we have enough room for output */
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+ if (Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(IMAGE_PATH))
+ {
+ return ViSetIoStatus(STATUS_BUFFER_TOO_SMALL, sizeof(IMAGE_PATH), Irp);
+ }
+
+ /* Get our image path from DO */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ ImagePath = Irp->AssociatedIrp.SystemBuffer;
+ ImagePath->Mounted = (DeviceExtension->VolumeObject != NULL);
+ ImagePath->Length = DeviceExtension->ImageName.Length;
+ /* And if it's set, copy it back to the caller */
+ if (DeviceExtension->ImageName.Length != 0)
+ {
+ RtlCopyMemory(ImagePath->Path, DeviceExtension->ImageName.Buffer,
DeviceExtension->ImageName.Length);
+ }
+
+ return ViSetIoStatus(STATUS_SUCCESS, sizeof(IMAGE_PATH), Irp);
+}
+
+NTSTATUS
+ViEjectMedia(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* Eject will force a verify */
+ SetFlag(DeviceObject->Flags, DO_VERIFY_VOLUME);
+
+ /* If we have an image mounted, unmount it
+ * But don't free anything related, so that
+ * we can perform quick remount.
+ * See: IOCTL_STORAGE_LOAD_MEDIA
+ */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ if (DeviceExtension->VolumeObject != NULL)
+ {
+ ObDereferenceObject(DeviceExtension->VolumeObject);
+ /* Device changed, so mandatory increment */
+ ++DeviceExtension->ChangeCount;
+ DeviceExtension->VolumeObject = NULL;
+ }
+
+ return ViSetIoStatus(STATUS_SUCCESS, 0, Irp);
+}
+
+NTSTATUS
+ViRemountMedia(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ NTSTATUS Status;
+ UNICODE_STRING Image;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* Get the device extension */
+ DeviceExtension = DeviceObject->DeviceExtension;
+ /* Allocate a new string as mount parameter */
+ Status = ViAllocateUnicodeString(DeviceExtension->ImageName.MaximumLength,
&Image);
+ if (!NT_SUCCESS(Status))
+ {
+ return ViSetIoStatus(Status, 0, Irp);
+ }
+
+ /* To allow cleanup in case of troubles */
+ _SEH2_TRY
+ {
+ /* Copy our current image name and mount */
+ RtlCopyUnicodeString(&Image, &DeviceExtension->ImageName);
+ Status = ViIssueMountImage(DeviceObject, &Image, Irp);
+ }
+ _SEH2_FINALLY
+ {
+ ViFreeUnicodeString(&Image);
+ }
+ _SEH2_END;
+
+ return ViSetIoStatus(Status, 0, Irp);
+}
+
+NTSTATUS
+NTAPI
+VcdDeviceControl(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+{
+ NTSTATUS Status;
+ UNICODE_STRING Image;
+ PIO_STACK_LOCATION Stack;
+ PMOUNT_PARAMETERS MountParameters;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ DeviceExtension = DeviceObject->DeviceExtension;
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+
+ _SEH2_TRY
+ {
+ switch (Stack->Parameters.DeviceIoControl.IoControlCode)
+ {
+ /* First of all, our private IOCTLs */
+ case IOCTL_VCDROM_CREATE_DRIVE:
+ Status = ViCreateDevice(DeviceObject->DriverObject, Irp);
+ break;
+
+ case IOCTL_VCDROM_DELETE_DRIVE:
+ Status = ViDeleteDevice(DeviceObject, Irp);
+ break;
+
+ case IOCTL_VCDROM_MOUNT_IMAGE:
+ MountParameters = Irp->AssociatedIrp.SystemBuffer;
+ Image.MaximumLength = 255 * sizeof(WCHAR);
+ Image.Length = MountParameters->Length;
+ Image.Buffer = MountParameters->Path;
+ DeviceExtension->Flags = MountParameters->Flags;
+ Status = ViIssueMountImage(DeviceObject, &Image, Irp);
+ break;
+
+ case IOCTL_VCDROM_ENUMERATE_DRIVES:
+ Status = ViEnumerateDrives(DeviceObject, Irp);
+ break;
+
+ case IOCTL_VCDROM_GET_IMAGE_PATH:
+ Status = ViGetImagePath(DeviceObject, Irp);
+ break;
+
+ /* Now, IOCTLs we have to handle as class driver */
+ case IOCTL_DISK_GET_DRIVE_GEOMETRY:
+ case IOCTL_CDROM_GET_DRIVE_GEOMETRY:
+ Status = ViGetDriveGeometry(DeviceObject, Irp);
+ break;
+
+ case IOCTL_DISK_CHECK_VERIFY:
+ case IOCTL_CDROM_CHECK_VERIFY:
+ Status = ViCheckVerify(DeviceObject, Irp);
+ break;
+
+ case IOCTL_CDROM_READ_TOC:
+ Status = ViReadToc(DeviceObject, Irp);
+ break;
+
+ case IOCTL_CDROM_READ_TOC_EX:
+ Status = ViReadTocEx(DeviceObject, Irp);
+ break;
+
+ case IOCTL_CDROM_GET_LAST_SESSION:
+ Status = ViGetLastSession(DeviceObject, Irp);
+ break;
+
+ case IOCTL_STORAGE_EJECT_MEDIA:
+ case IOCTL_CDROM_EJECT_MEDIA:
+ Status = ViEjectMedia(DeviceObject, Irp);
+ break;
+
+ /* That one is a bit specific
+ * It gets unmounted image mounted again
+ */
+ case IOCTL_STORAGE_LOAD_MEDIA:
+ /* That means it can only be performed if:
+ * - We had an image previously
+ * - It's no longer mounted
+ * Otherwise, we just return success
+ */
+ if (DeviceExtension->ImageName.Buffer == NULL ||
DeviceExtension->VolumeObject != NULL)
+ {
+ Status = ViSetIoStatus(STATUS_SUCCESS, 0, Irp);
+ }
+ else
+ {
+ Status = ViRemountMedia(DeviceObject, Irp);
+ }
+ break;
+
+ default:
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ DPRINT1("IOCTL: %x not supported\n",
Stack->Parameters.DeviceIoControl.IoControlCode);
+ break;
+ }
+ } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ Status = _SEH2_GetExceptionCode();
+ } _SEH2_END;
+
+ /* Depending on the failure code, we may force a verify */
+ if (!NT_SUCCESS(Status))
+ {
+ if (Status == STATUS_DEVICE_NOT_READY || Status == STATUS_IO_TIMEOUT ||
+ Status == STATUS_MEDIA_WRITE_PROTECTED || Status == STATUS_NO_MEDIA_IN_DEVICE
||
+ Status == STATUS_VERIFY_REQUIRED || Status == STATUS_UNRECOGNIZED_MEDIA ||
+ Status == STATUS_WRONG_VOLUME)
+ {
+ IoSetHardErrorOrVerifyDevice(Irp, DeviceObject);
+ }
+ }
+
+ IoCompleteRequest(Irp, IO_DISK_INCREMENT);
+
+ return Status;
+}
+
+NTSTATUS
+NTAPI
+DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
+{
+ NTSTATUS Status;
+ UNICODE_STRING DeviceName;
+ PDEVICE_OBJECT DeviceObject;
+ PDEVICE_EXTENSION DeviceExtension;
+
+ /* Set our entry points (rather limited :-)) */
+ DriverObject->DriverUnload = VcdUnload;
+ DriverObject->MajorFunction[IRP_MJ_CREATE] = VcdHandle;
+ DriverObject->MajorFunction[IRP_MJ_CLOSE] = VcdHandle;
+ DriverObject->MajorFunction[IRP_MJ_CLEANUP] = VcdHandle;
+ DriverObject->MajorFunction[IRP_MJ_READ] = VcdRead;
+ DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = VcdDeviceControl;
+
+ /* Create our main device to receive private IOCTLs */
+ RtlInitUnicodeString(&DeviceName, L"\\Device\\VirtualCdRom");
+ Status = IoCreateDevice(DriverObject, sizeof(DEVICE_EXTENSION), &DeviceName,
+ FILE_DEVICE_CD_ROM, FILE_READ_ONLY_DEVICE |
FILE_FLOPPY_DISKETTE,
+ FALSE, &DeviceObject);
+ if (!NT_SUCCESS(Status))
+ {
+ return Status;
+ }
+
+ /* Initialize our device extension */
+ ViInitializeDeviceExtension(DeviceObject);
+ DeviceExtension = DeviceObject->DeviceExtension;
+
+ /* And create our accessible name from umode */
+ ViAllocateUnicodeString(DEFAULT_STRING_SIZE, &DeviceExtension->GlobalName);
+ RtlAppendUnicodeToString(&DeviceExtension->GlobalName,
L"\\??\\VirtualCdRom");
+ Status = IoCreateSymbolicLink(&DeviceExtension->GlobalName, &DeviceName);
+ if (!NT_SUCCESS(Status))
+ {
+ IoDeleteDevice(DeviceObject);
+ return Status;
+ }
+
+ /* Initialize our mutex for device count */
+ ExInitializeFastMutex(&ViMutex);
+
+ /* And try to load images that would have been stored in registry */
+ ViLoadImagesFromRegistry(DriverObject, RegistryPath->Buffer);
+
+ return STATUS_SUCCESS;
+}
diff --git a/modules/rosapps/drivers/vcdrom/vcdrom.rc
b/modules/rosapps/drivers/vcdrom/vcdrom.rc
new file mode 100644
index 0000000000..d6bcc7a45d
--- /dev/null
+++ b/modules/rosapps/drivers/vcdrom/vcdrom.rc
@@ -0,0 +1,5 @@
+#define REACTOS_VERSION_DLL
+#define REACTOS_STR_FILE_DESCRIPTION "Virtual CD-ROM Class Driver"
+#define REACTOS_STR_INTERNAL_NAME "vcdrom"
+#define REACTOS_STR_ORIGINAL_FILENAME "vcdrom.sys"
+#include <reactos/version.rc>
diff --git a/modules/rosapps/drivers/vcdrom/vcdrom_reg.inf
b/modules/rosapps/drivers/vcdrom/vcdrom_reg.inf
new file mode 100644
index 0000000000..3eaf361c7c
--- /dev/null
+++ b/modules/rosapps/drivers/vcdrom/vcdrom_reg.inf
@@ -0,0 +1,7 @@
+; Vcdrom class driver
+[AddReg]
+HKLM,"SYSTEM\CurrentControlSet\Services\Vcdrom","ErrorControl",0x00010001,0x00000000
+HKLM,"SYSTEM\CurrentControlSet\Services\Vcdrom","Group",0x00000000,"SCSI
Class"
+HKLM,"SYSTEM\CurrentControlSet\Services\Vcdrom","ImagePath",0x00020000,"system32\drivers\vcdrom.sys"
+HKLM,"SYSTEM\CurrentControlSet\Services\Vcdrom","Start",0x00010001,0x00000003
+HKLM,"SYSTEM\CurrentControlSet\Services\Vcdrom","Type",0x00010001,0x00000001
2483
days inactive
2483
days old
0 comments
1 participants
participants (1)
-
Pierre Schweitzer