-/*
+/* $Id: object.c,v 1.46 2002/03/05 00:19:28 ekohl Exp $
+ *
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/ob/object.c
/* INCLUDES *****************************************************************/
#include <ddk/ntddk.h>
+#include <roscfg.h>
#include <internal/ob.h>
-#include <wstring.h>
-#include <string.h>
+#include <internal/ps.h>
+#include <internal/id.h>
+#include <internal/ke.h>
#define NDEBUG
#include <internal/debug.h>
/* FUNCTIONS ************************************************************/
+PVOID HEADER_TO_BODY(POBJECT_HEADER obj)
+{
+ return(((void *)obj)+sizeof(OBJECT_HEADER)-sizeof(COMMON_BODY_HEADER));
+}
+
+POBJECT_HEADER BODY_TO_HEADER(PVOID body)
+{
+ PCOMMON_BODY_HEADER chdr = (PCOMMON_BODY_HEADER)body;
+ return(CONTAINING_RECORD((&(chdr->Type)),OBJECT_HEADER,Type));
+}
+
+
+/**********************************************************************
+ * NAME PRIVATE
+ * ObInitializeObject
+ *
+ * DESCRIPTION
+ *
+ * ARGUMENTS
+ *
+ * RETURN VALUE
+ */
VOID ObInitializeObject(POBJECT_HEADER ObjectHeader,
PHANDLE Handle,
ACCESS_MASK DesiredAccess,
POBJECT_TYPE Type,
POBJECT_ATTRIBUTES ObjectAttributes)
{
- ObjectHeader->HandleCount = 1;
+ ObjectHeader->HandleCount = 0;
ObjectHeader->RefCount = 1;
ObjectHeader->ObjectType = Type;
- ObjectHeader->Permanent = FALSE;
+ if (ObjectAttributes != NULL &&
+ ObjectAttributes->Attributes & OBJ_PERMANENT)
+ {
+ ObjectHeader->Permanent = TRUE;
+ }
+ else
+ {
+ ObjectHeader->Permanent = FALSE;
+ }
RtlInitUnicodeString(&(ObjectHeader->Name),NULL);
if (Handle != NULL)
{
}
}
+
+/**********************************************************************
+ * NAME PRIVATE
+ * ObFindObject@16
+ *
+ * DESCRIPTION
+ *
+ * ARGUMENTS
+ * ObjectAttributes
+ *
+ * ReturnedObject
+ *
+ * RemainigPath
+ * Pointer to a unicode string that will contain the
+ * remaining path if the function returns successfully.
+ * The caller must free the buffer after use by calling
+ * RtlFreeUnicodeString ().
+ *
+ * ObjectType
+ * Optional pointer to an object type. This is used to
+ * descide if a symbolic link object will be parsed or not.
+ *
+ * RETURN VALUE
+ */
NTSTATUS ObFindObject(POBJECT_ATTRIBUTES ObjectAttributes,
PVOID* ReturnedObject,
- PWSTR* RemainingPath)
+ PUNICODE_STRING RemainingPath,
+ POBJECT_TYPE ObjectType)
{
PVOID NextObject;
PVOID CurrentObject;
+ PVOID RootObject;
POBJECT_HEADER CurrentHeader;
NTSTATUS Status;
PWSTR Path;
PWSTR current;
+ UNICODE_STRING PathString;
DPRINT("ObFindObject(ObjectAttributes %x, ReturnedObject %x, "
"RemainingPath %x)\n",ObjectAttributes,ReturnedObject,RemainingPath);
- DPRINT("ObjectAttributes->ObjectName->Buffer %x\n",
- ObjectAttributes->ObjectName->Buffer);
-
+ DPRINT("ObjectAttributes->ObjectName %wZ\n",
+ ObjectAttributes->ObjectName);
+
+ RtlInitUnicodeString (RemainingPath, NULL);
+
if (ObjectAttributes->RootDirectory == NULL)
{
ObReferenceObjectByPointer(NameSpaceRoot,
return(STATUS_SUCCESS);
}
- if (Path[0] != '\\')
+ if ((ObjectAttributes->RootDirectory == NULL) && (Path[0] != '\\'))
{
+ ObDereferenceObject(CurrentObject);
return(STATUS_UNSUCCESSFUL);
}
- current = Path;
+ if (Path)
+ {
+ RtlCreateUnicodeString (&PathString, Path);
+ current = PathString.Buffer;
+ }
+ else
+ {
+ RtlInitUnicodeString (&PathString, NULL);
+ current = NULL;
+ }
+
+ RootObject = CurrentObject;
while (TRUE)
{
- DPRINT("current %w\n",current);
+ DPRINT("current %S\n",current);
CurrentHeader = BODY_TO_HEADER(CurrentObject);
+
+ DPRINT("Current ObjectType %wZ\n",
+ &CurrentHeader->ObjectType->TypeName);
+
if (CurrentHeader->ObjectType->Parse == NULL)
{
+ DPRINT("Current object can't parse\n");
break;
}
- NextObject = CurrentHeader->ObjectType->Parse(CurrentObject,
- ¤t);
+ Status = CurrentHeader->ObjectType->Parse(CurrentObject,
+ &NextObject,
+ &PathString,
+ ¤t,
+ ObjectType,
+ ObjectAttributes->Attributes);
+ if (Status == STATUS_REPARSE)
+ {
+ /* reparse the object path */
+ NextObject = RootObject;
+ current = PathString.Buffer;
+
+ ObReferenceObjectByPointer(NextObject,
+ DIRECTORY_TRAVERSE,
+ NULL,
+ UserMode);
+ }
+
if (NextObject == NULL)
{
break;
CurrentObject = NextObject;
}
- *RemainingPath = current;
+ if (current)
+ RtlCreateUnicodeString (RemainingPath, current);
+ RtlFreeUnicodeString (&PathString);
*ReturnedObject = CurrentObject;
return(STATUS_SUCCESS);
}
-PVOID ObCreateObject(PHANDLE Handle,
- ACCESS_MASK DesiredAccess,
- POBJECT_ATTRIBUTES ObjectAttributes,
- POBJECT_TYPE Type)
+
+/**********************************************************************
+ * NAME EXPORTED
+ * ObCreateObject@36
+ *
+ * DESCRIPTION
+ *
+ * ARGUMENTS
+ *
+ * RETURN VALUE
+ */
+NTSTATUS STDCALL
+ObCreateObject(OUT PHANDLE Handle,
+ IN ACCESS_MASK DesiredAccess,
+ IN POBJECT_ATTRIBUTES ObjectAttributes,
+ IN POBJECT_TYPE Type,
+ OUT PVOID *Object)
{
- PVOID Parent = NULL;
- PWSTR RemainingPath = NULL;
- POBJECT_HEADER Header;
- NTSTATUS Status;
-
- DPRINT("ObCreateObject(Handle %x, ObjectAttributes %x, Type %x)\n");
- if (ObjectAttributes != NULL &&
- ObjectAttributes->ObjectName != NULL)
- {
- DPRINT("ObjectAttributes->ObjectName->Buffer %w\n",
- ObjectAttributes->ObjectName->Buffer);
- }
-
- if (ObjectAttributes != NULL &&
- ObjectAttributes->ObjectName != NULL)
- {
- ObFindObject(ObjectAttributes,
- &Parent,
- &RemainingPath);
- }
-
- Header = (POBJECT_HEADER)ExAllocatePool(NonPagedPool,
- OBJECT_ALLOC_SIZE(Type));
- ObInitializeObject(Header,
- Handle,
- DesiredAccess,
- Type,
- ObjectAttributes);
- if (Header->ObjectType != NULL &&
- Header->ObjectType->Create != NULL)
- {
- Status = Header->ObjectType->Create(HEADER_TO_BODY(Header),
- Parent,
- RemainingPath,
- ObjectAttributes);
- if (!NT_SUCCESS(Status))
- {
- return(NULL);
- }
- }
- return(HEADER_TO_BODY(Header));
+ PVOID Parent = NULL;
+ UNICODE_STRING RemainingPath;
+ POBJECT_HEADER Header;
+ POBJECT_HEADER ParentHeader = NULL;
+ NTSTATUS Status;
+ BOOLEAN ObjectAttached = FALSE;
+
+ assert_irql(APC_LEVEL);
+
+ DPRINT("ObCreateObject(Handle %x, ObjectAttributes %x, Type %x)\n",
+ Handle, ObjectAttributes, Type);
+ if (ObjectAttributes != NULL &&
+ ObjectAttributes->ObjectName != NULL)
+ {
+ DPRINT("ObjectAttributes->ObjectName->Buffer %S\n",
+ ObjectAttributes->ObjectName->Buffer);
+ }
+
+ if (ObjectAttributes != NULL &&
+ ObjectAttributes->ObjectName != NULL)
+ {
+ Status = ObFindObject(ObjectAttributes,
+ &Parent,
+ &RemainingPath,
+ NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("ObFindObject() failed! (Status 0x%x)\n", Status);
+ return(Status);
+ }
+ }
+ else
+ {
+ RtlInitUnicodeString(&RemainingPath, NULL);
+ }
+
+ RtlMapGenericMask(&DesiredAccess,
+ Type->Mapping);
+
+ Header = (POBJECT_HEADER)ExAllocatePoolWithTag(NonPagedPool,
+ OBJECT_ALLOC_SIZE(Type),
+ Type->Tag);
+ ObInitializeObject(Header,
+ Handle,
+ DesiredAccess,
+ Type,
+ ObjectAttributes);
+
+ if (Parent != NULL)
+ {
+ ParentHeader = BODY_TO_HEADER(Parent);
+ }
+
+ if (ParentHeader != NULL &&
+ ParentHeader->ObjectType == ObDirectoryType &&
+ RemainingPath.Buffer != NULL)
+ {
+ ObpAddEntryDirectory(Parent,
+ Header,
+ RemainingPath.Buffer+1);
+ ObjectAttached = TRUE;
+ }
+
+ if ((Header->ObjectType != NULL) &&
+ (Header->ObjectType->Create != NULL))
+ {
+ DPRINT("Calling %x\n", Header->ObjectType->Create);
+ Status = Header->ObjectType->Create(HEADER_TO_BODY(Header),
+ Parent,
+ RemainingPath.Buffer,
+ ObjectAttributes);
+ if (!NT_SUCCESS(Status))
+ {
+ if (ObjectAttached == TRUE)
+ {
+ ObpRemoveEntryDirectory(Header);
+ }
+ if (Parent)
+ {
+ ObDereferenceObject(Parent);
+ }
+ RtlFreeUnicodeString(&Header->Name);
+ RtlFreeUnicodeString(&RemainingPath);
+ ExFreePool(Header);
+ return(Status);
+ }
+ }
+ RtlFreeUnicodeString( &RemainingPath );
+
+ *Object = HEADER_TO_BODY(Header);
+
+ return(STATUS_SUCCESS);
}
-NTSTATUS ObReferenceObjectByPointer(PVOID ObjectBody,
- ACCESS_MASK DesiredAccess,
- POBJECT_TYPE ObjectType,
- KPROCESSOR_MODE AccessMode)
+
+NTSTATUS STDCALL
+ObReferenceObjectByPointer(IN PVOID Object,
+ IN ACCESS_MASK DesiredAccess,
+ IN POBJECT_TYPE ObjectType,
+ IN KPROCESSOR_MODE AccessMode)
/*
* FUNCTION: Increments the pointer reference count for a given object
* ARGUMENTS:
* RETURNS: Status
*/
{
- POBJECT_HEADER ObjectHeader;
+ POBJECT_HEADER Header;
- DPRINT("ObReferenceObjectByPointer(ObjectBody %x, ObjectType %x)\n",
- ObjectBody,ObjectType);
+// DPRINT("ObReferenceObjectByPointer(Object %x, ObjectType %x)\n",
+// Object,ObjectType);
- ObjectHeader = BODY_TO_HEADER(ObjectBody);
+ Header = BODY_TO_HEADER(Object);
- if (ObjectType != NULL && ObjectHeader->ObjectType != ObjectType)
+ if (ObjectType != NULL && Header->ObjectType != ObjectType)
{
- DPRINT("Failed (type was %x %w)\n",ObjectHeader->ObjectType,
- ObjectHeader->ObjectType->TypeName.Buffer);
+ DPRINT("Failed %x (type was %x %S) should be %x %S\n",
+ Header,
+ Header->ObjectType,
+ Header->ObjectType->TypeName.Buffer,
+ ObjectType,
+ ObjectType->TypeName.Buffer);
return(STATUS_UNSUCCESSFUL);
}
+ if (Header->ObjectType == PsProcessType)
+ {
+ DPRINT("Ref p 0x%x refcount %d type %x ",
+ Object, Header->RefCount, PsProcessType);
+ DPRINT("eip %x\n", ((PULONG)&Object)[-1]);
+ }
+ if (Header->ObjectType == PsThreadType)
+ {
+ DPRINT("Deref t 0x%x with refcount %d type %x ",
+ Object, Header->RefCount, PsThreadType);
+ DPRINT("eip %x\n", ((PULONG)&Object)[-1]);
+ }
+
+ Header->RefCount++;
- ObjectHeader->RefCount++;
return(STATUS_SUCCESS);
}
-NTSTATUS ObPerformRetentionChecks(POBJECT_HEADER Header)
+
+NTSTATUS STDCALL
+ObOpenObjectByPointer(IN POBJECT Object,
+ IN ULONG HandleAttributes,
+ IN PACCESS_STATE PassedAccessState,
+ IN ACCESS_MASK DesiredAccess,
+ IN POBJECT_TYPE ObjectType,
+ IN KPROCESSOR_MODE AccessMode,
+ OUT PHANDLE Handle)
{
- DPRINT("ObPerformRetentionChecks(Header %x), RefCount %d, HandleCount %d\n",
- Header,Header->RefCount,Header->HandleCount);
+ NTSTATUS Status;
- if (Header->RefCount < 0 || Header->HandleCount < 0)
- {
- KeBugCheck(0);
- }
+ DPRINT("ObOpenObjectByPointer()\n");
- if (Header->RefCount == 0 && Header->HandleCount == 0 &&
- !Header->Permanent)
+ Status = ObReferenceObjectByPointer(Object,
+ 0,
+ ObjectType,
+ AccessMode);
+ if (!NT_SUCCESS(Status))
{
- if (Header->ObjectType != NULL &&
- Header->ObjectType->Delete != NULL)
- {
- Header->ObjectType->Delete(HEADER_TO_BODY(Header));
- }
- if (Header->Name.Buffer != NULL)
- {
- ObRemoveEntry(Header);
- }
- DPRINT("ObPerformRetentionChecks() = Freeing object\n");
- ExFreePool(Header);
+ return Status;
}
- return(STATUS_SUCCESS);
+
+ Status = ObCreateHandle(PsGetCurrentProcess(),
+ Object,
+ DesiredAccess,
+ FALSE,
+ Handle);
+
+ ObDereferenceObject(Object);
+
+ return STATUS_SUCCESS;
}
-VOID ObDereferenceObject(PVOID ObjectBody)
-/*
- * FUNCTION: Decrements a given object's reference count and performs
- * retention checks
- * ARGUMENTS:
- * ObjectBody = Body of the object
+
+static NTSTATUS
+ObpPerformRetentionChecks(POBJECT_HEADER Header)
+{
+// DPRINT("ObPerformRetentionChecks(Header %x), RefCount %d, HandleCount %d\n",
+// Header,Header->RefCount,Header->HandleCount);
+
+ if (Header->RefCount < 0)
+ {
+ CPRINT("Object %x/%x has invalid reference count (%d)\n",
+ Header, HEADER_TO_BODY(Header), Header->RefCount);
+ KeBugCheck(0);
+ }
+ if (Header->HandleCount < 0)
+ {
+ CPRINT("Object %x/%x has invalid handle count (%d)\n",
+ Header, HEADER_TO_BODY(Header), Header->HandleCount);
+ KeBugCheck(0);
+ }
+
+ if (Header->RefCount == 0 &&
+ Header->HandleCount == 0 &&
+ Header->Permanent == FALSE)
+ {
+ if (Header->ObjectType != NULL &&
+ Header->ObjectType->Delete != NULL)
+ {
+ Header->ObjectType->Delete(HEADER_TO_BODY(Header));
+ }
+ if (Header->Name.Buffer != NULL)
+ {
+ ObpRemoveEntryDirectory(Header);
+ RtlFreeUnicodeString(&Header->Name);
+ }
+ DPRINT("ObPerformRetentionChecks() = Freeing object\n");
+ ExFreePool(Header);
+ }
+ return(STATUS_SUCCESS);
+}
+
+
+/**********************************************************************
+ * NAME EXPORTED
+ * ObfReferenceObject@4
+ *
+ * DESCRIPTION
+ * Increments a given object's reference count and performs
+ * retention checks.
+ *
+ * ARGUMENTS
+ * ObjectBody = Body of the object.
+ *
+ * RETURN VALUE
+ * None.
*/
+VOID FASTCALL
+ObfReferenceObject(IN PVOID Object)
{
- POBJECT_HEADER Header = BODY_TO_HEADER(ObjectBody);
-
- DPRINT("ObDeferenceObject(ObjectBody %x) RefCount %d\n",ObjectBody,
- Header->RefCount);
-
- Header->RefCount--;
- ObPerformRetentionChecks(Header);
+ POBJECT_HEADER Header;
+
+ assert(Object);
+
+ Header = BODY_TO_HEADER(Object);
+
+ Header->RefCount++;
+
+ ObpPerformRetentionChecks(Header);
+}
+
+
+/**********************************************************************
+ * NAME EXPORTED
+ * ObfDereferenceObject@4
+ *
+ * DESCRIPTION
+ * Decrements a given object's reference count and performs
+ * retention checks.
+ *
+ * ARGUMENTS
+ * ObjectBody = Body of the object.
+ *
+ * RETURN VALUE
+ * None.
+ */
+VOID FASTCALL
+ObfDereferenceObject(IN PVOID Object)
+{
+ POBJECT_HEADER Header;
+ extern POBJECT_TYPE PsProcessType;
+
+ assert(Object);
+
+ Header = BODY_TO_HEADER(Object);
+
+ if (Header->ObjectType == PsProcessType)
+ {
+ DPRINT("Deref p 0x%x with refcount %d type %x ",
+ Object, Header->RefCount, PsProcessType);
+ DPRINT("eip %x\n", ((PULONG)&Object)[-1]);
+ }
+ if (Header->ObjectType == PsThreadType)
+ {
+ DPRINT("Deref t 0x%x with refcount %d type %x ",
+ Object, Header->RefCount, PsThreadType);
+ DPRINT("eip %x\n", ((PULONG)&Object)[-1]);
+ }
+
+ Header->RefCount--;
+
+ ObpPerformRetentionChecks(Header);
+}
+
+
+/**********************************************************************
+ * NAME EXPORTED
+ * ObGetObjectPointerCount@4
+ *
+ * DESCRIPTION
+ * Retrieves the pointer(reference) count of the given object.
+ *
+ * ARGUMENTS
+ * ObjectBody = Body of the object.
+ *
+ * RETURN VALUE
+ * Reference count.
+ */
+ULONG STDCALL
+ObGetObjectPointerCount(PVOID Object)
+{
+ POBJECT_HEADER Header;
+
+ assert(Object);
+ Header = BODY_TO_HEADER(Object);
+
+ return(Header->RefCount);
+}
+
+
+/**********************************************************************
+ * NAME INTERNAL
+ * ObGetObjectHandleCount@4
+ *
+ * DESCRIPTION
+ * Retrieves the handle count of the given object.
+ *
+ * ARGUMENTS
+ * ObjectBody = Body of the object.
+ *
+ * RETURN VALUE
+ * Reference count.
+ */
+ULONG
+ObGetObjectHandleCount(PVOID Object)
+{
+ POBJECT_HEADER Header;
+
+ assert(Object);
+ Header = BODY_TO_HEADER(Object);
+
+ return(Header->HandleCount);
}
+
+/* EOF */
projects / reactos.git / blobdiff