reactos/drivers/filesystems/npfs/fsctrl.c

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/*
* PROJECT: ReactOS Named Pipe FileSystem
* LICENSE: BSD - See COPYING.ARM in the top level directory
* FILE: drivers/filesystems/npfs/fsctrl.c
* PURPOSE: Named Pipe FileSystem I/O Controls
* PROGRAMMERS: ReactOS Portable Systems Group
*/
/* INCLUDES *******************************************************************/
#include "npfs.h"
// File ID number for NPFS bugchecking support
#define NPFS_BUGCHECK_FILE_ID (NPFS_BUGCHECK_FSCTRL)
/* GLOBALS ********************************************************************/
IO_STATUS_BLOCK NpUserIoStatusBlock;
/* FUNCTIONS ******************************************************************/
NTSTATUS
NTAPI
NpInternalTransceive(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PLIST_ENTRY List)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
NTAPI
NpInternalRead(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN BOOLEAN Overflow,
IN PLIST_ENTRY List)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
NTAPI
NpInternalWrite(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PLIST_ENTRY List)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
NTAPI
NpQueryClientProcess(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
PIO_STACK_LOCATION IoStackLocation;
NODE_TYPE_CODE NodeTypeCode;
PNP_CCB Ccb;
PNP_CLIENT_PROCESS ClientSession, QueryBuffer;
ULONG Length;
PAGED_CODE();
/* Get the current stack location */
IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
/* Decode the file object and check the node type */
NodeTypeCode = NpDecodeFileObject(IoStackLocation->FileObject, 0, &Ccb, 0);
if (NodeTypeCode != NPFS_NTC_CCB)
{
return STATUS_PIPE_DISCONNECTED;
}
/* Get the length of the query buffer */
Length = IoStackLocation->Parameters.QueryFile.Length;
if (Length < 8)
{
return STATUS_INVALID_PARAMETER;
}
QueryBuffer = Irp->AssociatedIrp.SystemBuffer;
/* Lock the Ccb */
ExAcquireResourceExclusiveLite(&Ccb->NonPagedCcb->Lock, TRUE);
/* Get the CCBs client session and check if it's set */
ClientSession = Ccb->ClientSession;
if (ClientSession != NULL)
{
/* Copy first 2 fields */
QueryBuffer->Unknown = ClientSession->Unknown;
QueryBuffer->Process = ClientSession->Process;
}
else
{
/* Copy the process from the CCB */
QueryBuffer->Unknown = NULL;
QueryBuffer->Process = Ccb->Process;
}
/* Does the caller provide a large enough buffer for the full data? */
if (Length >= sizeof(NP_CLIENT_PROCESS))
{
Irp->IoStatus.Information = sizeof(NP_CLIENT_PROCESS);
/* Do we have a ClientSession structure? */
if (ClientSession != NULL)
{
/* Copy length and the data */
QueryBuffer->DataLength = ClientSession->DataLength;
RtlCopyMemory(QueryBuffer->Buffer,
ClientSession->Buffer,
ClientSession->DataLength);
/* NULL terminate the buffer */
NT_ASSERT(QueryBuffer->DataLength <= 30);
QueryBuffer->Buffer[QueryBuffer->DataLength / sizeof(WCHAR)] = 0;
}
else
{
/* No data */
QueryBuffer->DataLength = 0;
QueryBuffer->Buffer[0] = 0;
}
}
else
{
Irp->IoStatus.Information = FIELD_OFFSET(NP_CLIENT_PROCESS, DataLength);
}
/* Unlock the Ccb */
ExReleaseResourceLite(&Ccb->NonPagedCcb->Lock);
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
NpSetClientProcess(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
PIO_STACK_LOCATION IoStackLocation;
NODE_TYPE_CODE NodeTypeCode;
PNP_CCB Ccb;
ULONG Length;
PNP_CLIENT_PROCESS InputBuffer, ClientSession, OldClientSession;
PAGED_CODE();
/* Get the current stack location */
IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
/* Only kernel calls are allowed! */
if (IoStackLocation->MinorFunction != IRP_MN_KERNEL_CALL)
{
return STATUS_ACCESS_DENIED;
}
/* Decode the file object and check the node type */
NodeTypeCode = NpDecodeFileObject(IoStackLocation->FileObject, 0, &Ccb, 0);
if (NodeTypeCode != NPFS_NTC_CCB)
{
return STATUS_PIPE_DISCONNECTED;
}
/* Get the length of the query buffer and check if it's valid */
Length = IoStackLocation->Parameters.QueryFile.Length;
if (Length != sizeof(NP_CLIENT_PROCESS))
{
return STATUS_INVALID_PARAMETER;
}
/* Get the buffer and check if the data Length is valid */
InputBuffer = Irp->AssociatedIrp.SystemBuffer;
if (InputBuffer->DataLength > 30)
{
return STATUS_INVALID_PARAMETER;
}
/* Allocate a new structure */
ClientSession = ExAllocatePoolWithQuotaTag(PagedPool,
sizeof(NP_CLIENT_PROCESS),
'iFpN');
/* Copy the full input buffer */
RtlCopyMemory(ClientSession, InputBuffer, sizeof(NP_CLIENT_PROCESS));
/* Lock the Ccb */
ExAcquireResourceExclusiveLite(&Ccb->NonPagedCcb->Lock, TRUE);
/* Get the old ClientSession and set the new */
OldClientSession = Ccb->ClientSession;
Ccb->ClientSession = ClientSession;
/* Copy the process to the CCB */
Ccb->Process = ClientSession->Process;
/* Unlock the Ccb */
ExReleaseResourceLite(&Ccb->NonPagedCcb->Lock);
/* Check if there was already a ClientSession */
if (OldClientSession != NULL)
{
/* Free it */
ExFreePoolWithTag(OldClientSession, 'iFpN');
}
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
NpAssignEvent(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
NTAPI
NpQueryEvent(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
}
NTSTATUS
NTAPI
NpImpersonate(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
ULONG NamedPipeEnd;
PNP_CCB Ccb;
NTSTATUS Status;
NODE_TYPE_CODE NodeTypeCode;
PIO_STACK_LOCATION IoStack;
PAGED_CODE();
IoStack = IoGetCurrentIrpStackLocation(Irp);
NodeTypeCode = NpDecodeFileObject(IoStack->FileObject, NULL, &Ccb, &NamedPipeEnd);
if (NodeTypeCode == NPFS_NTC_CCB && NamedPipeEnd == FILE_PIPE_SERVER_END)
{
Status = NpImpersonateClientContext(Ccb);
}
else
{
Status = STATUS_ILLEGAL_FUNCTION;
}
return Status;
}
NTSTATUS
NTAPI
NpDisconnect(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PLIST_ENTRY List)
{
ULONG NamedPipeEnd;
PNP_CCB Ccb;
NTSTATUS Status;
NODE_TYPE_CODE NodeTypeCode;
PIO_STACK_LOCATION IoStack;
PAGED_CODE();
IoStack = IoGetCurrentIrpStackLocation(Irp);
NodeTypeCode = NpDecodeFileObject(IoStack->FileObject, NULL, &Ccb, &NamedPipeEnd);
if (NodeTypeCode == NPFS_NTC_CCB)
{
if (NamedPipeEnd == FILE_PIPE_SERVER_END)
{
ExAcquireResourceExclusiveLite(&Ccb->NonPagedCcb->Lock, TRUE);
Status = NpSetDisconnectedPipeState(Ccb, List);
NpUninitializeSecurity(Ccb);
ExReleaseResourceLite(&Ccb->NonPagedCcb->Lock);
}
else
{
Status = STATUS_ILLEGAL_FUNCTION;
}
}
else
{
Status = STATUS_PIPE_DISCONNECTED;
}
return Status;
}
NTSTATUS
NTAPI
NpListen(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PLIST_ENTRY List)
{
ULONG NamedPipeEnd;
PNP_CCB Ccb;
NTSTATUS Status;
NODE_TYPE_CODE NodeTypeCode;
PIO_STACK_LOCATION IoStack;
PAGED_CODE();
IoStack = IoGetCurrentIrpStackLocation(Irp);
NodeTypeCode = NpDecodeFileObject(IoStack->FileObject, NULL, &Ccb, &NamedPipeEnd);
if (NodeTypeCode == NPFS_NTC_CCB)
{
if (NamedPipeEnd == FILE_PIPE_SERVER_END)
{
ExAcquireResourceExclusiveLite(&Ccb->NonPagedCcb->Lock, TRUE);
Status = NpSetListeningPipeState(Ccb, Irp, List);
NpUninitializeSecurity(Ccb);
ExReleaseResourceLite(&Ccb->NonPagedCcb->Lock);
}
else
{
Status = STATUS_ILLEGAL_FUNCTION;
}
}
else
{
Status = STATUS_ILLEGAL_FUNCTION;
}
return Status;
}
NTSTATUS
NTAPI
NpPeek(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PLIST_ENTRY List)
{
PIO_STACK_LOCATION IoStack;
NODE_TYPE_CODE Type;
ULONG OutputLength;
ULONG NamedPipeEnd;
PNP_CCB Ccb;
PFILE_PIPE_PEEK_BUFFER PeekBuffer;
PNP_DATA_QUEUE DataQueue;
ULONG_PTR BytesPeeked;
IO_STATUS_BLOCK IoStatus;
NTSTATUS Status;
PNP_DATA_QUEUE_ENTRY DataEntry;
PAGED_CODE();
IoStack = IoGetCurrentIrpStackLocation(Irp);
OutputLength = IoStack->Parameters.FileSystemControl.OutputBufferLength;
Type = NpDecodeFileObject(IoStack->FileObject, NULL, &Ccb, &NamedPipeEnd);
if (!Type)
{
return STATUS_PIPE_DISCONNECTED;
}
if ((Type != NPFS_NTC_CCB) &&
(OutputLength < FIELD_OFFSET(FILE_PIPE_PEEK_BUFFER, Data)))
{
return STATUS_INVALID_PARAMETER;
}
PeekBuffer = Irp->AssociatedIrp.SystemBuffer;
if (NamedPipeEnd != FILE_PIPE_CLIENT_END)
{
if (NamedPipeEnd != FILE_PIPE_SERVER_END)
{
NpBugCheck(NamedPipeEnd, 0, 0);
}
DataQueue = &Ccb->DataQueue[FILE_PIPE_INBOUND];
}
else
{
DataQueue = &Ccb->DataQueue[FILE_PIPE_OUTBOUND];
}
if (Ccb->NamedPipeState != FILE_PIPE_CONNECTED_STATE)
{
if (Ccb->NamedPipeState != FILE_PIPE_CLOSING_STATE)
{
return STATUS_INVALID_PIPE_STATE;
}
if (DataQueue->QueueState != WriteEntries)
{
return STATUS_PIPE_BROKEN;
}
}
PeekBuffer->NamedPipeState = 0;
PeekBuffer->ReadDataAvailable = 0;
PeekBuffer->NumberOfMessages = 0;
PeekBuffer->MessageLength = 0;
PeekBuffer->NamedPipeState = Ccb->NamedPipeState;
BytesPeeked = FIELD_OFFSET(FILE_PIPE_PEEK_BUFFER, Data);
if (DataQueue->QueueState == WriteEntries)
{
DataEntry = CONTAINING_RECORD(DataQueue->Queue.Flink,
NP_DATA_QUEUE_ENTRY,
QueueEntry);
ASSERT((DataEntry->DataEntryType == Buffered) || (DataEntry->DataEntryType == Unbuffered));
PeekBuffer->ReadDataAvailable = DataQueue->BytesInQueue - DataQueue->ByteOffset;
if (Ccb->Fcb->NamedPipeType == FILE_PIPE_MESSAGE_TYPE)
{
PeekBuffer->NumberOfMessages = DataQueue->EntriesInQueue;
PeekBuffer->MessageLength = DataEntry->DataSize - DataQueue->ByteOffset;
}
if (OutputLength == FIELD_OFFSET(FILE_PIPE_PEEK_BUFFER, Data))
{
Status = PeekBuffer->ReadDataAvailable ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS;
}
else
{
IoStatus = NpReadDataQueue(DataQueue,
TRUE,
FALSE,
PeekBuffer->Data,
OutputLength - FIELD_OFFSET(FILE_PIPE_PEEK_BUFFER, Data),
Ccb->Fcb->NamedPipeType == FILE_PIPE_MESSAGE_TYPE,
Ccb,
List);
Status = IoStatus.Status;
BytesPeeked += IoStatus.Information;
}
}
else
{
Status = STATUS_SUCCESS;
}
Irp->IoStatus.Information = BytesPeeked;
return Status;
}
NTSTATUS
NTAPI
NpCompleteTransceiveIrp(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context)
{
PAGED_CODE();
if (Irp->AssociatedIrp.SystemBuffer)
{
ExFreePool(Irp->AssociatedIrp.SystemBuffer);
}
IoFreeIrp(Irp);
return STATUS_MORE_PROCESSING_REQUIRED;
}
NTSTATUS
NTAPI
NpTransceive(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PLIST_ENTRY List)
{
PIO_STACK_LOCATION IoStack;
PVOID InBuffer, OutBuffer;
ULONG InLength, OutLength, BytesWritten;
NODE_TYPE_CODE NodeTypeCode;
PNP_CCB Ccb;
ULONG NamedPipeEnd;
PNP_NONPAGED_CCB NonPagedCcb;
PNP_DATA_QUEUE ReadQueue, WriteQueue;
PNP_EVENT_BUFFER EventBuffer;
NTSTATUS Status;
PIRP NewIrp;
PAGED_CODE();
IoStack = IoGetCurrentIrpStackLocation(Irp);
InLength = IoStack->Parameters.FileSystemControl.InputBufferLength;
InBuffer = IoStack->Parameters.FileSystemControl.Type3InputBuffer;
OutLength = IoStack->Parameters.FileSystemControl.OutputBufferLength;
OutBuffer = Irp->UserBuffer;
if (Irp->RequestorMode == UserMode)
{
_SEH2_TRY
{
ProbeForRead(InBuffer, InLength, sizeof(CHAR));
ProbeForWrite(OutBuffer, OutLength, sizeof(CHAR));
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
}
NodeTypeCode = NpDecodeFileObject(IoStack->FileObject, NULL, &Ccb, &NamedPipeEnd);
if (NodeTypeCode != NPFS_NTC_CCB)
{
return STATUS_PIPE_DISCONNECTED;
}
NonPagedCcb = Ccb->NonPagedCcb;
ExAcquireResourceExclusiveLite(&NonPagedCcb->Lock, TRUE);
if (Ccb->NamedPipeState != FILE_PIPE_CONNECTED_STATE)
{
Status = STATUS_INVALID_PIPE_STATE;
goto Quickie;
}
if (NamedPipeEnd != FILE_PIPE_CLIENT_END)
{
if (NamedPipeEnd != FILE_PIPE_SERVER_END)
{
NpBugCheck(NamedPipeEnd, 0, 0);
}
ReadQueue = &Ccb->DataQueue[FILE_PIPE_INBOUND];
WriteQueue = &Ccb->DataQueue[FILE_PIPE_OUTBOUND];
}
else
{
ReadQueue = &Ccb->DataQueue[FILE_PIPE_OUTBOUND];
WriteQueue = &Ccb->DataQueue[FILE_PIPE_INBOUND];
}
EventBuffer = NonPagedCcb->EventBuffer[NamedPipeEnd];
if (Ccb->Fcb->NamedPipeConfiguration != FILE_PIPE_FULL_DUPLEX ||
Ccb->ReadMode[NamedPipeEnd] != FILE_PIPE_MESSAGE_MODE)
{
Status = STATUS_INVALID_PIPE_STATE;
goto Quickie;
}
if (ReadQueue->QueueState != Empty)
{
Status = STATUS_PIPE_BUSY;
goto Quickie;
}
Status = NpWriteDataQueue(WriteQueue,
FILE_PIPE_MESSAGE_MODE,
InBuffer,
InLength,
Ccb->Fcb->NamedPipeType,
&BytesWritten,
Ccb,
NamedPipeEnd,
Irp->Tail.Overlay.Thread,
List);
if (Status == STATUS_MORE_PROCESSING_REQUIRED)
{
ASSERT(WriteQueue->QueueState != ReadEntries);
NewIrp = IoAllocateIrp(DeviceObject->StackSize, TRUE);
if (!NewIrp)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
goto Quickie;
}
IoSetCompletionRoutine(NewIrp, NpCompleteTransceiveIrp, NULL, TRUE, TRUE, TRUE);
if (BytesWritten)
{
NewIrp->AssociatedIrp.SystemBuffer = ExAllocatePoolWithQuotaTag(PagedPool | POOL_QUOTA_FAIL_INSTEAD_OF_RAISE,
BytesWritten,
NPFS_WRITE_BLOCK_TAG);
if (!NewIrp->AssociatedIrp.SystemBuffer)
{
IoFreeIrp(NewIrp);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto Quickie;
}
_SEH2_TRY
{
RtlCopyMemory(NewIrp->AssociatedIrp.SystemBuffer,
(PVOID)((ULONG_PTR)InBuffer + InLength - BytesWritten),
BytesWritten);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Status = _SEH2_GetExceptionCode();
_SEH2_YIELD(goto Quickie);
}
_SEH2_END;
}
else
{
NewIrp->AssociatedIrp.SystemBuffer = NULL;
}
IoStack = IoGetNextIrpStackLocation(NewIrp);
IoSetNextIrpStackLocation(NewIrp);
NewIrp->Tail.Overlay.Thread = Irp->Tail.Overlay.Thread;
NewIrp->IoStatus.Information = BytesWritten;
IoStack->Parameters.Write.Length = BytesWritten;
IoStack->MajorFunction = IRP_MJ_WRITE;
if (BytesWritten > 0) NewIrp->Flags = IRP_DEALLOCATE_BUFFER | IRP_BUFFERED_IO;
NewIrp->UserIosb = &NpUserIoStatusBlock;
Status = NpAddDataQueueEntry(NamedPipeEnd,
Ccb,
WriteQueue,
WriteEntries,
Unbuffered,
BytesWritten,
NewIrp,
NULL,
0);
if (Status != STATUS_PENDING)
{
NewIrp->IoStatus.Status = Status;
InsertTailList(List, &NewIrp->Tail.Overlay.ListEntry);
}
}
if (!NT_SUCCESS(Status)) goto Quickie;
if (EventBuffer) KeSetEvent(EventBuffer->Event, IO_NO_INCREMENT, FALSE);
ASSERT(ReadQueue->QueueState == Empty);
Status = NpAddDataQueueEntry(NamedPipeEnd,
Ccb,
ReadQueue,
ReadEntries,
Buffered,
OutLength,
Irp,
NULL,
0);
if (NT_SUCCESS(Status))
{
if (EventBuffer) KeSetEvent(EventBuffer->Event, IO_NO_INCREMENT, FALSE);
}
Quickie:
ExReleaseResourceLite(&Ccb->NonPagedCcb->Lock);
return Status;
}
NTSTATUS
NTAPI
NpWaitForNamedPipe(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
PIO_STACK_LOCATION IoStack;
ULONG InLength, NameLength;
UNICODE_STRING SourceString, Prefix;
ULONG NamedPipeEnd;
PNP_CCB Ccb;
PFILE_PIPE_WAIT_FOR_BUFFER Buffer;
NTSTATUS Status;
NODE_TYPE_CODE NodeTypeCode;
PLIST_ENTRY NextEntry;
PNP_FCB Fcb;
PWCHAR OriginalBuffer;
PAGED_CODE();
IoStack = IoGetCurrentIrpStackLocation(Irp);
InLength = IoStack->Parameters.FileSystemControl.InputBufferLength;
SourceString.Buffer = NULL;
if (NpDecodeFileObject(IoStack->FileObject,
NULL,
&Ccb,
&NamedPipeEnd) != NPFS_NTC_ROOT_DCB)
{
Status = STATUS_ILLEGAL_FUNCTION;
goto Quickie;
}
Buffer = (PFILE_PIPE_WAIT_FOR_BUFFER)Irp->AssociatedIrp.SystemBuffer;
if (InLength < sizeof(*Buffer))
{
Status = STATUS_INVALID_PARAMETER;
goto Quickie;
}
NameLength = Buffer->NameLength;
if ((NameLength > (0xFFFF - sizeof(UNICODE_NULL))) ||
((NameLength + FIELD_OFFSET(FILE_PIPE_WAIT_FOR_BUFFER, Name)) > InLength))
{
Status = STATUS_INVALID_PARAMETER;
goto Quickie;
}
SourceString.Length = (USHORT)NameLength + sizeof(OBJ_NAME_PATH_SEPARATOR);
SourceString.Buffer = ExAllocatePoolWithTag(PagedPool,
SourceString.Length,
NPFS_WRITE_BLOCK_TAG);
if (!SourceString.Buffer)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
goto Quickie;
}
SourceString.Buffer[0] = OBJ_NAME_PATH_SEPARATOR;
RtlCopyMemory(&SourceString.Buffer[1], Buffer->Name, Buffer->NameLength);
Status = STATUS_SUCCESS;
OriginalBuffer = SourceString.Buffer;
//Status = NpTranslateAlias(&SourceString);
if (!NT_SUCCESS(Status)) goto Quickie;
Fcb = NpFindPrefix(&SourceString, 1, &Prefix);
Fcb = (PNP_FCB)((ULONG_PTR)Fcb & ~1);
NodeTypeCode = Fcb ? Fcb->NodeType : 0;
if (NodeTypeCode != NPFS_NTC_FCB)
{
Status = STATUS_OBJECT_NAME_NOT_FOUND;
goto Quickie;
}
for (NextEntry = Fcb->CcbList.Flink;
NextEntry != &Fcb->CcbList;
NextEntry = NextEntry->Flink)
{
Ccb = CONTAINING_RECORD(NextEntry, NP_CCB, CcbEntry);
if (Ccb->NamedPipeState == FILE_PIPE_LISTENING_STATE) break;
}
if (NextEntry != &Fcb->CcbList)
{
Status = STATUS_SUCCESS;
}
else
{
Status = NpAddWaiter(&NpVcb->WaitQueue,
Fcb->Timeout,
Irp,
OriginalBuffer == SourceString.Buffer ?
NULL : &SourceString);
}
Quickie:
if (SourceString.Buffer) ExFreePool(SourceString.Buffer);
return Status;
}
NTSTATUS
NTAPI
NpCommonFileSystemControl(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
ULONG Fsctl;
BOOLEAN Overflow = FALSE;
LIST_ENTRY DeferredList;
NTSTATUS Status;
PAGED_CODE();
InitializeListHead(&DeferredList);
Fsctl = IoGetCurrentIrpStackLocation(Irp)->Parameters.FileSystemControl.FsControlCode;
switch (Fsctl)
{
case FSCTL_PIPE_PEEK:
NpAcquireExclusiveVcb();
Status = NpPeek(DeviceObject, Irp, &DeferredList);
break;
case FSCTL_PIPE_INTERNAL_WRITE:
NpAcquireSharedVcb();
Status = NpInternalWrite(DeviceObject, Irp, &DeferredList);
break;
case FSCTL_PIPE_TRANSCEIVE:
NpAcquireSharedVcb();
Status = NpTransceive(DeviceObject, Irp, &DeferredList);
break;
case FSCTL_PIPE_INTERNAL_TRANSCEIVE:
NpAcquireSharedVcb();
Status = NpInternalTransceive(DeviceObject, Irp, &DeferredList);
break;
case FSCTL_PIPE_INTERNAL_READ_OVFLOW:
Overflow = TRUE;
// on purpose
case FSCTL_PIPE_INTERNAL_READ:
NpAcquireSharedVcb();
Status = NpInternalRead(DeviceObject, Irp, Overflow, &DeferredList);
break;
case FSCTL_PIPE_QUERY_CLIENT_PROCESS:
NpAcquireSharedVcb();
Status = NpQueryClientProcess(DeviceObject, Irp);
break;
case FSCTL_PIPE_ASSIGN_EVENT:
NpAcquireExclusiveVcb();
Status = NpAssignEvent(DeviceObject, Irp);
break;
case FSCTL_PIPE_DISCONNECT:
NpAcquireExclusiveVcb();
Status = NpDisconnect(DeviceObject, Irp, &DeferredList);
break;
case FSCTL_PIPE_LISTEN:
NpAcquireSharedVcb();
Status = NpListen(DeviceObject, Irp, &DeferredList);
break;
case FSCTL_PIPE_QUERY_EVENT:
NpAcquireExclusiveVcb();
Status = NpQueryEvent(DeviceObject, Irp);
break;
case FSCTL_PIPE_WAIT:
NpAcquireExclusiveVcb();
Status = NpWaitForNamedPipe(DeviceObject, Irp);
break;
case FSCTL_PIPE_IMPERSONATE:
NpAcquireExclusiveVcb();
Status = NpImpersonate(DeviceObject, Irp);
break;
case FSCTL_PIPE_SET_CLIENT_PROCESS:
NpAcquireExclusiveVcb();
Status = NpSetClientProcess(DeviceObject, Irp);
break;
default:
return STATUS_NOT_SUPPORTED;
}
NpReleaseVcb();
NpCompleteDeferredIrps(&DeferredList);
return Status;
}
NTSTATUS
NTAPI
NpFsdFileSystemControl(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
NTSTATUS Status;
PAGED_CODE();
FsRtlEnterFileSystem();
Status = NpCommonFileSystemControl(DeviceObject, Irp);
FsRtlExitFileSystem();
if (Status != STATUS_PENDING)
{
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_NAMED_PIPE_INCREMENT);
}
return Status;
}
/* EOF */