ReactOS 0.4.15-dev-7942-gd23573b
filter.cpp File Reference
#include "udffs.h"
Include dependency graph for filter.cpp:

Go to the source code of this file.

Macros

#define UDF_BUG_CHECK_ID   UDF_FILE_FILTER
 

Functions

VOID UDFCheckOtherFS (PDEVICE_OBJECT deviceObject)
 
VOID UDFCheckOtherFSByName (PCWSTR DeviceObjectName)
 

Macro Definition Documentation

◆ UDF_BUG_CHECK_ID

#define UDF_BUG_CHECK_ID   UDF_FILE_FILTER

Definition at line 24 of file filter.cpp.

Function Documentation

◆ UDFCheckOtherFS()

VOID UDFCheckOtherFS ( PDEVICE_OBJECT  deviceObject)

Definition at line 27 of file filter.cpp.

27 {
28 PFILTER_DEV_EXTENSION FilterDevExt;
29 PDEVICE_OBJECT filterDeviceObject;
30 NTSTATUS RC;
31
32// BrutePoint();
33
34 // Acquire GlobalDataResource
35 UDFAcquireResourceExclusive(&(UDFGlobalData.GlobalDataResource), TRUE);
36
37 if (!NT_SUCCESS(RC = IoCreateDevice(
38 UDFGlobalData.DriverObject, // our driver object
39 sizeof(FILTER_DEV_EXTENSION), // don't need an extension
40 // for this object
41 NULL, // name - can be used to
42 // "open" the driver
43 // see the R.Nagar's book
44 // for alternate choices
46 0, // no special characteristics
47 // do not want this as an
48 // exclusive device, though
49 // we might
50 FALSE,
51 &filterDeviceObject))) {
52 // failed to create a filter device object, leave ...
53 // Release the global resource.
54 UDFReleaseResource( &(UDFGlobalData.GlobalDataResource) );
55 return;
56 }
57 FilterDevExt = (PFILTER_DEV_EXTENSION)filterDeviceObject->DeviceExtension;
58 // Zero it out (typically this has already been done by the I/O
59 // Manager but it does not hurt to do it again)!
60 RtlZeroMemory(FilterDevExt, sizeof(FILTER_DEV_EXTENSION));
61
62 // Initialize the signature fields
64 FilterDevExt->NodeIdentifier.NodeSize = sizeof(FILTER_DEV_EXTENSION);
65
66 UDFPrint(("UDFCheckOtherFS: Attaching filter devobj %x to FS devobj %x \n",filterDeviceObject,deviceObject));
68 UDFPrint(("UDFCheckOtherFS: top devobj is %x \n",deviceObject));
69 FilterDevExt->lowerFSDeviceObject = deviceObject;
70
71 RC = IoAttachDeviceByPointer( filterDeviceObject, deviceObject );
72 if (!NT_SUCCESS(RC)) {
73 IoDeleteDevice( filterDeviceObject );
74 } else {
75 filterDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
76 }
77 // Release the global resource.
78 UDFReleaseResource( &(UDFGlobalData.GlobalDataResource) );
79}
LONG NTSTATUS
Definition: precomp.h:26
#define NULL
Definition: types.h:112
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
#define NT_SUCCESS(StatCode)
Definition: apphelp.c:32
#define UDFReleaseResource(Resource)
Definition: env_spec_w32.h:661
#define UDFAcquireResourceExclusive(Resource, CanWait)
Definition: env_spec_w32.h:656
MxDeviceObject deviceObject
NTSTATUS NTAPI 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)
Definition: device.c:1031
VOID NTAPI IoDeleteDevice(IN PDEVICE_OBJECT DeviceObject)
Definition: device.c:1251
PDEVICE_OBJECT NTAPI IoGetAttachedDevice(PDEVICE_OBJECT DeviceObject)
Definition: device.c:1385
NTSTATUS NTAPI IoAttachDeviceByPointer(IN PDEVICE_OBJECT SourceDevice, IN PDEVICE_OBJECT TargetDevice)
Definition: device.c:947
#define FILE_DEVICE_CD_ROM_FILE_SYSTEM
Definition: winioctl.h:109
#define UDF_NODE_TYPE_FILTER_DEVOBJ
Definition: struct.h:64
struct _FILTER_DEV_EXTENSION * PFILTER_DEV_EXTENSION
struct _FILTER_DEV_EXTENSION FILTER_DEV_EXTENSION
PVOID DeviceExtension
Definition: env_spec_w32.h:418
PDEVICE_OBJECT lowerFSDeviceObject
Definition: struct.h:350
UDFIdentifier NodeIdentifier
Definition: struct.h:348
uint32 NodeType
Definition: struct.h:75
uint32 NodeSize
Definition: struct.h:76
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
UDFData UDFGlobalData
Definition: udfinit.cpp:25
#define UDFPrint(Args)
Definition: udffs.h:223

Referenced by UDFCheckOtherFSByName().

◆ UDFCheckOtherFSByName()

VOID UDFCheckOtherFSByName ( PCWSTR  DeviceObjectName)

Definition at line 82 of file filter.cpp.

82 {
83 PFILE_OBJECT fileObject;
85 UNICODE_STRING nameString;
86 NTSTATUS RC;
87
88 UDFPrint(("UDFCheckOtherFSByName: trying %s \n",DeviceObjectName));
89
90 RtlInitUnicodeString( &nameString, DeviceObjectName );
92 &nameString,
94 &fileObject,
96 );
97
98 if (!NT_SUCCESS(RC)) {
99 UDFPrint(("UDFCheckOtherFSByName: error %x while calling IoGetDeviceObjectPointer \n",RC));
100 return;
101 }
102
104
105 ObDereferenceObject( fileObject );
106}
VOID UDFCheckOtherFS(PDEVICE_OBJECT deviceObject)
Definition: filter.cpp:27
#define FILE_READ_ATTRIBUTES
Definition: nt_native.h:647
NTSYSAPI VOID NTAPI RtlInitUnicodeString(PUNICODE_STRING DestinationString, PCWSTR SourceString)
NTSTATUS NTAPI IoGetDeviceObjectPointer(IN PUNICODE_STRING ObjectName, IN ACCESS_MASK DesiredAccess, OUT PFILE_OBJECT *FileObject, OUT PDEVICE_OBJECT *DeviceObject)
Definition: device.c:1435
* PFILE_OBJECT
Definition: iotypes.h:1998
#define ObDereferenceObject
Definition: obfuncs.h:203