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- Use IoBuildAsynchronousFsdRequest instead IoBuildSynchronousFsdRequest in NtRead/WriteFile.

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- Guard the calls to IoBuildAsynchronousFsdRequest with an exception frame.

svn path=/trunk/; revision=14421
This commit is contained in:
Hartmut Birr 2005-04-01 18:22:17 +00:00
parent de83dfa5b8
commit 7bf6af0dce
1 changed files with 79 additions and 23 deletions
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102
reactos/ntoskrnl/io/rw.c
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@ -44,7 +44,7 @@ NtReadFile (IN HANDLE FileHandle,
{
NTSTATUS Status;
PFILE_OBJECT FileObject;
PIRP Irp;
PIRP Irp = NULL;
PIO_STACK_LOCATION StackPtr;
KPROCESSOR_MODE PreviousMode;
PKEVENT EventObject = NULL;
@ -92,24 +92,52 @@ NtReadFile (IN HANDLE FileHandle,
PreviousMode,
(PVOID*)&EventObject,
NULL);
if (!NT_SUCCESS(Status))
{
ObDereferenceObject(FileObject);
return Status;
}
if (!NT_SUCCESS(Status))
{
ObDereferenceObject(FileObject);
return Status;
}
KeClearEvent(EventObject);
}
KeClearEvent(&FileObject->Event);
_SEH_TRY
{
Irp = IoBuildAsynchronousFsdRequest(IRP_MJ_READ,
FileObject->DeviceObject,
Buffer,
Length,
ByteOffset,
IoStatusBlock);
}
_SEH_HANDLE
{
Status = _SEH_GetExceptionCode();
}
_SEH_END;
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
FileObject->DeviceObject,
Buffer,
Length,
ByteOffset,
EventObject,
IoStatusBlock);
if (!NT_SUCCESS(Status) || Irp == NULL)
{
if (Event)
{
ObDereferenceObject(&EventObject);
}
ObDereferenceObject(FileObject);
if (Irp)
{
IoFreeIrp(Irp);
}
return NT_SUCCESS(Status) ? STATUS_INSUFFICIENT_RESOURCES : Status;
}
Irp->UserEvent = Event;
if (FileObject->Flags & FO_SYNCHRONOUS_IO)
{
/* synchronous irp's are queued to requestor thread's irp cancel/cleanup list */
IoQueueThreadIrp(Irp);
}
KeClearEvent(&FileObject->Event);
/* Trigger FileObject/Event dereferencing */
Irp->Tail.Overlay.OriginalFileObject = FileObject;
@ -172,7 +200,7 @@ NtWriteFile (IN HANDLE FileHandle,
OBJECT_HANDLE_INFORMATION HandleInformation;
NTSTATUS Status;
PFILE_OBJECT FileObject;
PIRP Irp;
PIRP Irp = NULL;
PIO_STACK_LOCATION StackPtr;
KPROCESSOR_MODE PreviousMode;
PKEVENT EventObject = NULL;
@ -253,15 +281,43 @@ NtWriteFile (IN HANDLE FileHandle,
KeClearEvent(EventObject);
}
KeClearEvent(&FileObject->Event);
_SEH_TRY
{
Irp = IoBuildAsynchronousFsdRequest(IRP_MJ_WRITE,
FileObject->DeviceObject,
Buffer,
Length,
ByteOffset,
IoStatusBlock);
}
_SEH_HANDLE
{
Status = _SEH_GetExceptionCode();
}
_SEH_END;
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
FileObject->DeviceObject,
Buffer,
Length,
ByteOffset,
EventObject,
IoStatusBlock);
if (!NT_SUCCESS(Status) || Irp == NULL)
{
if (Event)
{
ObDereferenceObject(&EventObject);
}
ObDereferenceObject(FileObject);
if (Irp)
{
IoFreeIrp(Irp);
}
return NT_SUCCESS(Status) ? STATUS_INSUFFICIENT_RESOURCES : Status;
}
Irp->UserEvent = Event;
if (FileObject->Flags & FO_SYNCHRONOUS_IO)
{
/* synchronous irp's are queued to requestor thread's irp cancel/cleanup list */
IoQueueThreadIrp(Irp);
}
KeClearEvent(&FileObject->Event);
/* Trigger FileObject/Event dereferencing */
Irp->Tail.Overlay.OriginalFileObject = FileObject;