1 Jul
2006
1 Jul
'06
4:21 a.m.
Author: ion
Date: Sat Jul 1 08:21:19 2006
New Revision: 22736
URL: http://svn.reactos.org/svn/reactos?rev=22736&view=rev
Log:
- IopGetDevicePointer: Close the handle if we were able to acquire it.
- IoAttachDevice/IoAttachDeviceByPointer: Fail with STATUS_NO_SUCH_DEVICE if we
couldn't attach.
- IoAttachDEviceTodEviceStackSafe: VPBs don't get inherited.
- IoCreateDevice: Only set OBJ_PERMAMENT if the caller requested it.
- IoCreateDevice: Return a NULL Device object if we failed to create it.
- IoCreateDevice: Set alignment requirement to 0, x86 doesn't need it.
Modified:
trunk/reactos/ntoskrnl/io/device.c
Modified: trunk/reactos/ntoskrnl/io/device.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/device.c?rev=2…
==============================================================================
--- trunk/reactos/ntoskrnl/io/device.c (original)
+++ trunk/reactos/ntoskrnl/io/device.c Sat Jul 1 08:21:19 2006
@@ -1,11 +1,11 @@
/*
- * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Kernel
+ * LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/io/device.c
* PURPOSE: Device Object Management, including Notifications and Queues.
- *
- * PROGRAMMERS: Alex Ionescu
- * David Welch (welch(a)cwcom.net)
+ * PROGRAMMERS: Alex Ionescu (alex.ionescu(a)reactos.org)
+ * Filip Navara (navaraf(a)reactos.org)
+ * Hervé Poussineau (hpoussin(a)reactos.org)
*/
/* INCLUDES *******************************************************************/
@@ -184,10 +184,6 @@
HANDLE FileHandle;
NTSTATUS Status;
- DPRINT("IoGetDeviceObjectPointer(ObjectName %wZ, DesiredAccess %x,"
- "FileObject %p DeviceObject %p)\n",
- ObjectName, DesiredAccess, FileObject, DeviceObject);
-
/* Open the Device */
InitializeObjectAttributes(&ObjectAttributes,
ObjectName,
@@ -200,12 +196,7 @@
&StatusBlock,
0,
FILE_NON_DIRECTORY_FILE | AttachFlag);
-
- if (!NT_SUCCESS(Status))
- {
- DPRINT1("NtOpenFile failed, Status: 0x%x\n", Status);
- return Status;
- }
+ if (!NT_SUCCESS(Status)) return Status;
/* Get File Object */
Status = ObReferenceObjectByHandle(FileHandle,
@@ -219,10 +210,10 @@
/* Return the requested data */
*DeviceObject = IoGetRelatedDeviceObject(LocalFileObject);
*FileObject = LocalFileObject;
+ ZwClose(FileHandle);
}
/* Close the handle */
- ZwClose(FileHandle);
return Status;
}
@@ -257,25 +248,22 @@
PDEVICE_OBJECT TargetDevice = NULL;
/* Call the helper routine for an attach operation */
- DPRINT("IoAttachDevice\n");
Status = IopGetDeviceObjectPointer(TargetDeviceName,
FILE_READ_ATTRIBUTES,
&FileObject,
&TargetDevice,
IO_ATTACH_DEVICE_API);
-
- if (!NT_SUCCESS(Status))
- {
- DPRINT1("Failed to get Device Object\n");
- return Status;
- }
+ if (!NT_SUCCESS(Status)) return Status;
/* Attach the device */
- IoAttachDeviceToDeviceStackSafe(SourceDevice, TargetDevice, AttachedDevice);
-
- /* Derference it */
+ Status = IoAttachDeviceToDeviceStackSafe(SourceDevice,
+ TargetDevice,
+ AttachedDevice);
+ if (!*AttachedDevice) Status = STATUS_NO_SUCH_DEVICE;
+
+ /* Dereference it */
ObDereferenceObject(FileObject);
- return STATUS_SUCCESS;
+ return Status;
}
/*
@@ -292,12 +280,9 @@
PDEVICE_OBJECT AttachedDevice;
NTSTATUS Status = STATUS_SUCCESS;
- DPRINT("IoAttachDeviceByPointer(SourceDevice 0x%p, TargetDevice 0x%p)\n",
- SourceDevice, TargetDevice);
-
/* Do the Attach */
AttachedDevice = IoAttachDeviceToDeviceStack(SourceDevice, TargetDevice);
- if (AttachedDevice == NULL) Status = STATUS_NO_SUCH_DEVICE;
+ if (!AttachedDevice) Status = STATUS_NO_SUCH_DEVICE;
/* Return the status */
return Status;
@@ -318,13 +303,11 @@
PDEVICE_OBJECT LocalAttach;
/* Attach it safely */
- DPRINT("IoAttachDeviceToDeviceStack\n");
Status = IoAttachDeviceToDeviceStackSafe(SourceDevice,
TargetDevice,
&LocalAttach);
/* Return it */
- DPRINT("IoAttachDeviceToDeviceStack DONE: 0x%p\n", LocalAttach);
return LocalAttach;
}
@@ -340,25 +323,27 @@
PDEVICE_OBJECT AttachedDevice;
PEXTENDED_DEVOBJ_EXTENSION SourceDeviceExtension;
- DPRINT("IoAttachDeviceToDeviceStack(SourceDevice 0x%p, TargetDevice
0x%p)\n",
- SourceDevice, TargetDevice);
-
/* Get the Attached Device and source extension */
AttachedDevice = IoGetAttachedDevice(TargetDevice);
- SourceDeviceExtension =
(PEXTENDED_DEVOBJ_EXTENSION)SourceDevice->DeviceObjectExtension;
+ SourceDeviceExtension = (PEXTENDED_DEVOBJ_EXTENSION)SourceDevice->
+ DeviceObjectExtension;
/* Make sure that it's in a correct state */
- if
(!(((PEXTENDED_DEVOBJ_EXTENSION)AttachedDevice->DeviceObjectExtension)->ExtensionFlags
&
- (DOE_UNLOAD_PENDING | DOE_DELETE_PENDING |
- DOE_REMOVE_PENDING | DOE_REMOVE_PROCESSED)))
- {
- /* Update fields */
+ if (!(((PEXTENDED_DEVOBJ_EXTENSION)AttachedDevice->DeviceObjectExtension)->
+ ExtensionFlags & (DOE_UNLOAD_PENDING |
+ DOE_DELETE_PENDING |
+ DOE_REMOVE_PENDING |
+ DOE_REMOVE_PROCESSED)))
+ {
+ /* Update atached device fields */
AttachedDevice->AttachedDevice = SourceDevice;
- SourceDevice->AttachedDevice = NULL;
+ AttachedDevice->Spare1++;
+
+ /* Update the source with the attached data */
SourceDevice->StackSize = AttachedDevice->StackSize + 1;
- SourceDevice->AlignmentRequirement = AttachedDevice->AlignmentRequirement;
+ SourceDevice->AlignmentRequirement = AttachedDevice->
+ AlignmentRequirement;
SourceDevice->SectorSize = AttachedDevice->SectorSize;
- SourceDevice->Vpb = AttachedDevice->Vpb;
/* Set the attachment in the device extension */
SourceDeviceExtension->AttachedTo = AttachedDevice;
@@ -408,13 +393,13 @@
*/
NTSTATUS
STDCALL
-IoCreateDevice(PDRIVER_OBJECT DriverObject,
- ULONG DeviceExtensionSize,
- PUNICODE_STRING DeviceName,
- DEVICE_TYPE DeviceType,
- ULONG DeviceCharacteristics,
- BOOLEAN Exclusive,
- PDEVICE_OBJECT *DeviceObject)
+IoCreateDevice(IN PDRIVER_OBJECT DriverObject,
+ IN ULONG DeviceExtensionSize,
+ IN PUNICODE_STRING DeviceName,
+ IN DEVICE_TYPE DeviceType,
+ IN ULONG DeviceCharacteristics,
+ IN BOOLEAN Exclusive,
+ OUT PDEVICE_OBJECT *DeviceObject)
{
WCHAR AutoNameBuffer[20];
UNICODE_STRING AutoName;
@@ -425,16 +410,17 @@
ULONG AlignedDeviceExtensionSize;
ULONG TotalSize;
HANDLE TempHandle;
-
- ASSERT_IRQL(PASSIVE_LEVEL);
- DPRINT("IoCreateDevice(DriverObject 0x%p)\n", DriverObject);
-
- /* Generate a name if we have to */
+ PAGED_CODE();
+
+ /* Check if we have to generate a name */
if (DeviceCharacteristics & FILE_AUTOGENERATED_DEVICE_NAME)
{
+ /* Generate it */
swprintf(AutoNameBuffer,
L"\\Device\\%08lx",
InterlockedIncrementUL(&IopDeviceObjectNumber));
+
+ /* Initialize the name */
RtlInitUnicodeString(&AutoName, AutoNameBuffer);
DeviceName = &AutoName;
}
@@ -443,24 +429,21 @@
InitializeObjectAttributes(&ObjectAttributes, DeviceName, 0, NULL, NULL);
/* Honor exclusive flag */
- ObjectAttributes.Attributes |= OBJ_EXCLUSIVE;
+ if (Exclusive) ObjectAttributes.Attributes |= OBJ_EXCLUSIVE;
/* Create a permanent object for named devices */
- if (DeviceName != NULL)
- {
- ObjectAttributes.Attributes |= OBJ_PERMANENT;
- }
+ if (DeviceName) ObjectAttributes.Attributes |= OBJ_PERMANENT;
/* Align the Extension Size to 8-bytes */
AlignedDeviceExtensionSize = (DeviceExtensionSize + 7) &~ 7;
- DPRINT("AlignedDeviceExtensionSize %x\n", AlignedDeviceExtensionSize);
/* Total Size */
TotalSize = AlignedDeviceExtensionSize +
- sizeof(DEVICE_OBJECT) + sizeof(EXTENDED_DEVOBJ_EXTENSION);
- DPRINT("TotalSize %x\n", TotalSize);
+ sizeof(DEVICE_OBJECT) +
+ sizeof(EXTENDED_DEVOBJ_EXTENSION);
/* Create the Device Object */
+ *DeviceObject = NULL;
Status = ObCreateObject(KernelMode,
IoDeviceObjectType,
&ObjectAttributes,
@@ -470,16 +453,10 @@
0,
0,
(PVOID*)&CreatedDeviceObject);
-
- if (!NT_SUCCESS(Status))
- {
- DPRINT1("IoCreateDevice() ObCreateObject failed, status: 0x%08X\n",
Status);
- return Status;
- }
+ if (!NT_SUCCESS(Status)) return Status;
/* Clear the whole Object and extension so we don't null stuff manually */
RtlZeroMemory(CreatedDeviceObject, TotalSize);
- DPRINT("CreatedDeviceObject 0x%p\n", CreatedDeviceObject);
/*
* Setup the Type and Size. Note that we don't use the aligned size,
@@ -494,7 +471,6 @@
AlignedDeviceExtensionSize);
/* Set the Type and Size. Question: why is Size 0 on Windows? */
- DPRINT("DeviceObjectExtension 0x%p\n", DeviceObjectExtension);
DeviceObjectExtension->Type = IO_TYPE_DEVICE_OBJECT_EXTENSION;
DeviceObjectExtension->Size = 0;
@@ -509,10 +485,9 @@
CreatedDeviceObject + 1 :
NULL;
CreatedDeviceObject->StackSize = 1;
- CreatedDeviceObject->AlignmentRequirement = 1; /* FIXME */
+ CreatedDeviceObject->AlignmentRequirement = 0;
/* Set the Flags */
- /* FIXME: After the Driver is Loaded, the flag below should be removed */
CreatedDeviceObject->Flags = DO_DEVICE_INITIALIZING;
if (Exclusive) CreatedDeviceObject->Flags |= DO_EXCLUSIVE;
if (DeviceName) CreatedDeviceObject->Flags |= DO_DEVICE_HAS_NAME;
@@ -535,15 +510,20 @@
/* Set the right Sector Size */
switch (DeviceType)
{
+ /* All disk systems */
case FILE_DEVICE_DISK_FILE_SYSTEM:
case FILE_DEVICE_DISK:
case FILE_DEVICE_VIRTUAL_DISK:
+
+ /* The default is 512 bytes */
CreatedDeviceObject->SectorSize = 512;
break;
+ /* CD-ROM file systems */
case FILE_DEVICE_CD_ROM_FILE_SYSTEM:
+
+ /* The default is 2048 bytes */
CreatedDeviceObject->SectorSize = 2048;
- break;
}
/* Create the Device Queue */
@@ -569,11 +549,9 @@
1,
(PVOID*)&CreatedDeviceObject,
&TempHandle);
-
if (!NT_SUCCESS(Status))
{
- DPRINT1("Cannot insert Device Object '%wZ' into Handle Table (status
0x%08lx)\n",
- DeviceName, Status);
+ /* Clear the device object and fail */
*DeviceObject = NULL;
return Status;
}
@@ -583,9 +561,9 @@
CreatedDeviceObject->DriverObject = DriverObject;
CreatedDeviceObject->NextDevice = DriverObject->DeviceObject;
DriverObject->DeviceObject = CreatedDeviceObject;
+
+ /* Close the temporary handle and return to caller */
NtClose(TempHandle);
-
- /* Return to caller */
*DeviceObject = CreatedDeviceObject;
return STATUS_SUCCESS;
}