- Fixed various problems (hangs/crashes) with connecting, disconnecting and closing named pipes.

svn path=/trunk/; revision=9312
This commit is contained in:
Filip Navara 2004-05-05 18:30:16 +00:00
parent 65093d7a1e
commit 333e6a58cb
4 changed files with 215 additions and 242 deletions

View file

@ -1,4 +1,4 @@
/* $Id: create.c,v 1.18 2004/04/12 14:46:02 navaraf Exp $
/* $Id: create.c,v 1.19 2004/05/05 18:30:16 navaraf Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -19,18 +19,18 @@
/* FUNCTIONS *****************************************************************/
NTSTATUS STDCALL
NpfsCreate(PDEVICE_OBJECT DeviceObject,
PIRP Irp)
NpfsCreate(
PDEVICE_OBJECT DeviceObject,
PIRP Irp)
{
PLIST_ENTRY CurrentEntry;
PNPFS_PIPE Current;
PIO_STACK_LOCATION IoStack;
PFILE_OBJECT FileObject;
PNPFS_PIPE Pipe;
PNPFS_FCB ClientFcb;
PNPFS_FCB ServerFcb;
PNPFS_PIPE current;
PLIST_ENTRY current_entry;
PNPFS_DEVICE_EXTENSION DeviceExt;
KIRQL oldIrql;
ULONG Disposition;
DPRINT("NpfsCreate(DeviceObject %p Irp %p)\n", DeviceObject, Irp);
@ -42,156 +42,154 @@ NpfsCreate(PDEVICE_OBJECT DeviceObject,
DPRINT("FileObject %p\n", FileObject);
DPRINT("FileName %wZ\n", &FileObject->FileName);
Irp->IoStatus.Information = 0;
/*
* Step 1. Find the pipe we're trying to open.
*/
KeLockMutex(&DeviceExt->PipeListLock);
CurrentEntry = DeviceExt->PipeListHead.Flink;
while (CurrentEntry != &DeviceExt->PipeListHead)
{
Current = CONTAINING_RECORD(CurrentEntry, NPFS_PIPE, PipeListEntry);
if (RtlCompareUnicodeString(
&FileObject->FileName,
&Current->PipeName,
TRUE) == 0)
{
break;
}
CurrentEntry = CurrentEntry->Flink;
}
/* Not found, bail out with error. */
if (CurrentEntry == &DeviceExt->PipeListHead)
{
DPRINT("No pipe found!\n");
KeUnlockMutex(&DeviceExt->PipeListLock);
Irp->IoStatus.Status = STATUS_OBJECT_NAME_NOT_FOUND;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_OBJECT_NAME_NOT_FOUND;
}
KeUnlockMutex(&DeviceExt->PipeListLock);
/* Save the pipe we found for later use. */
Pipe = Current;
/*
* Step 2. Search for listening server FCB.
*/
/*
* Acquire the lock for FCB lists. From now on no modifications to the
* FCB lists are allowed, because it can cause various misconsistencies.
*/
KeLockMutex(&Pipe->FcbListLock);
CurrentEntry = Pipe->ServerFcbListHead.Flink;
while (CurrentEntry != &Pipe->ServerFcbListHead)
{
ServerFcb = CONTAINING_RECORD(CurrentEntry, NPFS_FCB, FcbListEntry);
if (ServerFcb->PipeState == FILE_PIPE_LISTENING_STATE)
{
DPRINT("Server found! Fcb %p\n", ServerFcb);
break;
}
CurrentEntry = CurrentEntry->Flink;
}
/* Not found, bail out with error for FILE_OPEN requests. */
if (CurrentEntry == &Pipe->ServerFcbListHead)
{
DPRINT("No server fcb found!\n");
if (Disposition == FILE_OPEN)
{
KeUnlockMutex(&Pipe->FcbListLock);
Irp->IoStatus.Status = STATUS_PIPE_BUSY;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_PIPE_BUSY;
}
ServerFcb = NULL;
}
/*
* Step 3. Create the client FCB.
*/
ClientFcb = ExAllocatePool(NonPagedPool, sizeof(NPFS_FCB));
if (ClientFcb == NULL)
{
Irp->IoStatus.Status = STATUS_NO_MEMORY;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
DPRINT("No memory!\n");
return(STATUS_NO_MEMORY);
}
KeLockMutex(&DeviceExt->PipeListLock);
current_entry = DeviceExt->PipeListHead.Flink;
while (current_entry != &DeviceExt->PipeListHead)
{
current = CONTAINING_RECORD(current_entry,
NPFS_PIPE,
PipeListEntry);
if (RtlCompareUnicodeString(&FileObject->FileName,
&current->PipeName,
TRUE) == 0)
{
break;
}
current_entry = current_entry->Flink;
}
if (current_entry == &DeviceExt->PipeListHead)
{
ExFreePool(ClientFcb);
KeUnlockMutex(&DeviceExt->PipeListLock);
Irp->IoStatus.Status = STATUS_OBJECT_NAME_NOT_FOUND;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
DPRINT("No pipe found!\n");
return(STATUS_OBJECT_NAME_NOT_FOUND);
}
Pipe = current;
{
DPRINT("No memory!\n");
KeUnlockMutex(&Pipe->FcbListLock);
Irp->IoStatus.Status = STATUS_NO_MEMORY;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_NO_MEMORY;
}
ClientFcb->Pipe = Pipe;
ClientFcb->PipeEnd = FILE_PIPE_CLIENT_END;
ClientFcb->OtherSide = NULL;
ClientFcb->PipeState = FILE_PIPE_DISCONNECTED_STATE;
/* initialize data list */
/* Initialize data list. */
if (Pipe->InboundQuota)
{
ClientFcb->Data = ExAllocatePool(NonPagedPool, Pipe->InboundQuota);
if (ClientFcb->Data == NULL)
{
ExFreePool(ClientFcb);
KeUnlockMutex(&DeviceExt->PipeListLock);
Irp->IoStatus.Status = STATUS_NO_MEMORY;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
DPRINT("No memory!\n");
return(STATUS_NO_MEMORY);
}
}
{
ClientFcb->Data = ExAllocatePool(NonPagedPool, Pipe->InboundQuota);
if (ClientFcb->Data == NULL)
{
DPRINT("No memory!\n");
ExFreePool(ClientFcb);
KeUnlockMutex(&Pipe->FcbListLock);
Irp->IoStatus.Status = STATUS_NO_MEMORY;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_NO_MEMORY;
}
}
else
{
ClientFcb->Data = NULL;
}
{
ClientFcb->Data = NULL;
}
ClientFcb->ReadPtr = ClientFcb->Data;
ClientFcb->WritePtr = ClientFcb->Data;
ClientFcb->ReadDataAvailable = 0;
ClientFcb->WriteQuotaAvailable = Pipe->InboundQuota;
ClientFcb->MaxDataLength = Pipe->InboundQuota;
KeInitializeSpinLock(&ClientFcb->DataListLock);
KeInitializeEvent(&ClientFcb->ConnectEvent,
SynchronizationEvent,
FALSE);
KeInitializeEvent(&ClientFcb->Event,
SynchronizationEvent,
FALSE);
KeAcquireSpinLock(&Pipe->FcbListLock, &oldIrql);
KeInitializeEvent(&ClientFcb->ConnectEvent, SynchronizationEvent, FALSE);
KeInitializeEvent(&ClientFcb->Event, SynchronizationEvent, FALSE);
/*
* Step 4. Add the client FCB to a list and connect it if necessary.
*/
/* Add the client FCB to the pipe FCB list. */
InsertTailList(&Pipe->ClientFcbListHead, &ClientFcb->FcbListEntry);
KeReleaseSpinLock(&Pipe->FcbListLock, oldIrql);
Pipe->ReferenceCount++;
KeUnlockMutex(&DeviceExt->PipeListLock);
/* search for listening server fcb */
current_entry = Pipe->ServerFcbListHead.Flink;
while (current_entry != &Pipe->ServerFcbListHead)
{
ServerFcb = CONTAINING_RECORD(current_entry,
NPFS_FCB,
FcbListEntry);
if (ServerFcb->PipeState == FILE_PIPE_LISTENING_STATE)
{
DPRINT("Server found! Fcb %p\n", ServerFcb);
break;
}
current_entry = current_entry->Flink;
}
if (current_entry == &Pipe->ServerFcbListHead)
{
DPRINT("No server fcb found!\n");
if (ServerFcb)
{
ClientFcb->OtherSide = ServerFcb;
ServerFcb->OtherSide = ClientFcb;
ClientFcb->PipeState = FILE_PIPE_CONNECTED_STATE;
ServerFcb->PipeState = FILE_PIPE_CONNECTED_STATE;
FileObject->FsContext = ClientFcb;
/* Wake server thread */
DPRINT("Setting the ConnectEvent for %x\n", ServerFcb);
KeSetEvent(&ServerFcb->ConnectEvent, 0, FALSE);
}
KeUnlockMutex(&Pipe->FcbListLock);
if (Disposition == FILE_OPEN)
{
Irp->IoStatus.Status = STATUS_PIPE_BUSY;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_PIPE_BUSY;
}
else
{
Irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
}
ClientFcb->OtherSide = ServerFcb;
ServerFcb->OtherSide = ClientFcb;
ClientFcb->PipeState = FILE_PIPE_CONNECTED_STATE;
ServerFcb->PipeState = FILE_PIPE_CONNECTED_STATE;
/* FIXME: create data queue(s) */
/* wake server thread */
KeSetEvent(&ServerFcb->ConnectEvent, 0, FALSE);
FileObject->FsContext = ClientFcb;
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
DPRINT("Success!\n");
return(STATUS_SUCCESS);
return STATUS_SUCCESS;
}
@ -204,7 +202,6 @@ NpfsCreateNamedPipe(PDEVICE_OBJECT DeviceObject,
PNPFS_DEVICE_EXTENSION DeviceExt;
PNPFS_PIPE Pipe;
PNPFS_FCB Fcb;
KIRQL oldIrql;
PLIST_ENTRY current_entry;
PNPFS_PIPE current;
PIO_PIPE_CREATE_BUFFER Buffer;
@ -262,6 +259,7 @@ NpfsCreateNamedPipe(PDEVICE_OBJECT DeviceObject,
if (Pipe->CurrentInstances >= Pipe->MaximumInstances)
{
DPRINT("Out of instances.\n");
ExFreePool(Fcb);
Irp->IoStatus.Status = STATUS_PIPE_BUSY;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
@ -272,6 +270,7 @@ NpfsCreateNamedPipe(PDEVICE_OBJECT DeviceObject,
if (Pipe->MaximumInstances != Buffer->MaxInstances ||
Pipe->TimeOut.QuadPart != Buffer->TimeOut.QuadPart)
{
DPRINT("Asked for invalid pipe mode.\n");
ExFreePool(Fcb);
Irp->IoStatus.Status = STATUS_ACCESS_DENIED;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
@ -301,10 +300,9 @@ NpfsCreateNamedPipe(PDEVICE_OBJECT DeviceObject,
return(STATUS_NO_MEMORY);
}
Pipe->ReferenceCount = 0;
InitializeListHead(&Pipe->ServerFcbListHead);
InitializeListHead(&Pipe->ClientFcbListHead);
KeInitializeSpinLock(&Pipe->FcbListLock);
KeInitializeMutex(&Pipe->FcbListLock, 0);
Pipe->PipeType = Buffer->WriteModeMessage ? FILE_PIPE_MESSAGE_TYPE : FILE_PIPE_BYTE_STREAM_TYPE;
Pipe->PipeWriteMode = Buffer->WriteModeMessage ? FILE_PIPE_MESSAGE_MODE : FILE_PIPE_BYTE_STREAM_MODE;
@ -396,12 +394,11 @@ NpfsCreateNamedPipe(PDEVICE_OBJECT DeviceObject,
Fcb->MaxDataLength = Pipe->OutboundQuota;
KeInitializeSpinLock(&Fcb->DataListLock);
Pipe->ReferenceCount++;
Pipe->CurrentInstances++;
KeAcquireSpinLock(&Pipe->FcbListLock, &oldIrql);
KeLockMutex(&Pipe->FcbListLock);
InsertTailList(&Pipe->ServerFcbListHead, &Fcb->FcbListEntry);
KeReleaseSpinLock(&Pipe->FcbListLock, oldIrql);
KeUnlockMutex(&Pipe->FcbListLock);
Fcb->Pipe = Pipe;
Fcb->PipeEnd = FILE_PIPE_SERVER_END;
@ -426,122 +423,88 @@ NpfsCreateNamedPipe(PDEVICE_OBJECT DeviceObject,
NTSTATUS STDCALL
NpfsClose(PDEVICE_OBJECT DeviceObject,
PIRP Irp)
NpfsClose(
PDEVICE_OBJECT DeviceObject,
PIRP Irp)
{
PNPFS_DEVICE_EXTENSION DeviceExt;
PIO_STACK_LOCATION IoStack;
PFILE_OBJECT FileObject;
PNPFS_FCB Fcb;
PNPFS_PIPE Pipe;
KIRQL oldIrql;
PNPFS_DEVICE_EXTENSION DeviceExt;
PIO_STACK_LOCATION IoStack;
PFILE_OBJECT FileObject;
PNPFS_FCB Fcb;
PNPFS_PIPE Pipe;
BOOL Server;
DPRINT("NpfsClose(DeviceObject %p Irp %p)\n", DeviceObject, Irp);
DPRINT("NpfsClose(DeviceObject %p Irp %p)\n", DeviceObject, Irp);
IoStack = IoGetCurrentIrpStackLocation(Irp);
DeviceExt = (PNPFS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
FileObject = IoStack->FileObject;
Fcb = FileObject->FsContext;
IoStack = IoGetCurrentIrpStackLocation(Irp);
DeviceExt = (PNPFS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
FileObject = IoStack->FileObject;
Fcb = FileObject->FsContext;
if (Fcb == NULL)
{
if (Fcb == NULL)
{
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
return(STATUS_SUCCESS);
}
DPRINT("Fcb %x\n", Fcb);
Pipe = Fcb->Pipe;
DPRINT("Fcb %x\n", Fcb);
Pipe = Fcb->Pipe;
DPRINT("Closing pipe %wZ\n", &Pipe->PipeName);
DPRINT("Closing pipe %wZ\n", &Pipe->PipeName);
KeLockMutex(&Pipe->FcbListLock);
KeLockMutex(&DeviceExt->PipeListLock);
Server = (Fcb->PipeEnd == FILE_PIPE_SERVER_END);
if (Fcb->PipeEnd == FILE_PIPE_SERVER_END)
{
if (Server)
{
/* FIXME: Clean up existing connections here ?? */
DPRINT("Server\n");
Pipe->CurrentInstances--;
if (Fcb->PipeState == FILE_PIPE_CONNECTED_STATE)
{
if (Fcb->OtherSide)
{
Fcb->OtherSide->PipeState = FILE_PIPE_CLOSING_STATE;
/* Signaling the write event. If is possible that an other
* thread waits of an empty buffer.
*/
KeSetEvent(&Fcb->OtherSide->Event, IO_NO_INCREMENT, FALSE);
}
Fcb->PipeState = 0;
}
}
Pipe->ReferenceCount--;
if (Fcb->PipeEnd == FILE_PIPE_CLIENT_END)
{
} else
{
DPRINT("Client\n");
if (Fcb->PipeState == FILE_PIPE_CONNECTED_STATE)
{
if (Fcb->OtherSide)
{
Fcb->OtherSide->PipeState = FILE_PIPE_CLOSING_STATE;
/* Signaling the read event. If is possible that an other
* thread waits of read data.
*/
KeSetEvent(&Fcb->OtherSide->Event, IO_NO_INCREMENT, FALSE);
}
Fcb->PipeState = 0;
}
}
}
FileObject->FsContext = NULL;
if (Fcb->PipeState == FILE_PIPE_CONNECTED_STATE)
{
if (Fcb->OtherSide)
{
Fcb->OtherSide->PipeState = FILE_PIPE_CLOSING_STATE;
/*
* Signaling the write event. If is possible that an other
* thread waits of an empty buffer.
*/
KeSetEvent(&Fcb->OtherSide->Event, IO_NO_INCREMENT, FALSE);
}
Fcb->PipeState = 0;
}
#if 0
DPRINT("%x\n", Pipe->ReferenceCount);
if (Pipe->ReferenceCount == 0)
#else
if (Fcb->PipeEnd == FILE_PIPE_SERVER_END &&
Fcb->Pipe->CurrentInstances == 0)
#endif
{
KeAcquireSpinLock(&Pipe->FcbListLock, &oldIrql);
if (Fcb->OtherSide)
{
RemoveEntryList(&Fcb->OtherSide->FcbListEntry);
}
RemoveEntryList(&Fcb->FcbListEntry);
KeReleaseSpinLock(&Pipe->FcbListLock, oldIrql);
if (Fcb->OtherSide)
{
if (Fcb->OtherSide->Data)
{
ExFreePool(Fcb->OtherSide->Data);
}
ExFreePool(Fcb->OtherSide);
}
if (Fcb->Data)
{
ExFreePool(Fcb->Data);
}
ExFreePool(Fcb);
FileObject->FsContext = NULL;
RemoveEntryList(&Fcb->FcbListEntry);
if (Fcb->Data)
ExFreePool(Fcb->Data);
ExFreePool(Fcb);
KeUnlockMutex(&Pipe->FcbListLock);
if (Server && Pipe->CurrentInstances == 0)
{
RtlFreeUnicodeString(&Pipe->PipeName);
KeLockMutex(&DeviceExt->PipeListLock);
RemoveEntryList(&Pipe->PipeListEntry);
KeUnlockMutex(&DeviceExt->PipeListLock);
ExFreePool(Pipe);
}
}
KeUnlockMutex(&DeviceExt->PipeListLock);
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return(STATUS_SUCCESS);
return STATUS_SUCCESS;
}
/* EOF */

View file

@ -1,4 +1,4 @@
/* $Id: fsctrl.c,v 1.14 2004/04/12 13:03:29 navaraf Exp $
/* $Id: fsctrl.c,v 1.15 2004/05/05 18:30:16 navaraf Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -25,12 +25,14 @@ NpfsConnectPipe(PNPFS_FCB Fcb)
PLIST_ENTRY current_entry;
PNPFS_FCB ClientFcb;
NTSTATUS Status;
KIRQL oldIrql;
DPRINT("NpfsConnectPipe()\n");
if (Fcb->PipeState == FILE_PIPE_CONNECTED_STATE)
{
KeResetEvent(&Fcb->ConnectEvent);
return STATUS_PIPE_CONNECTED;
}
if (Fcb->PipeState == FILE_PIPE_CLOSING_STATE)
return STATUS_PIPE_CLOSING;
@ -41,7 +43,7 @@ NpfsConnectPipe(PNPFS_FCB Fcb)
/* search for a listening client fcb */
KeAcquireSpinLock(&Pipe->FcbListLock, &oldIrql);
KeLockMutex(&Pipe->FcbListLock);
current_entry = Pipe->ClientFcbListHead.Flink;
while (current_entry != &Pipe->ClientFcbListHead)
{
@ -70,20 +72,22 @@ NpfsConnectPipe(PNPFS_FCB Fcb)
Fcb->PipeState = FILE_PIPE_CONNECTED_STATE;
ClientFcb->PipeState = FILE_PIPE_CONNECTED_STATE;
KeReleaseSpinLock(&Pipe->FcbListLock, oldIrql);
KeUnlockMutex(&Pipe->FcbListLock);
/* FIXME: create and initialize data queues */
/* signal client's connect event */
DPRINT("Setting the ConnectEvent for %x\n", ClientFcb);
KeSetEvent(&ClientFcb->ConnectEvent, IO_NO_INCREMENT, FALSE);
Status = STATUS_PIPE_CONNECTED;
}
else
{
/* no listening client fcb found */
DPRINT("No listening client fcb found -- waiting for client\n");
KeReleaseSpinLock(&Pipe->FcbListLock, oldIrql);
KeUnlockMutex(&Pipe->FcbListLock);
Fcb->PipeState = FILE_PIPE_LISTENING_STATE;
@ -93,13 +97,18 @@ NpfsConnectPipe(PNPFS_FCB Fcb)
FALSE,
NULL);
if (NT_SUCCESS(Status))
{
Status = STATUS_PIPE_CONNECTED;
Fcb->PipeState = FILE_PIPE_CONNECTED_STATE;
}
DPRINT("Finished waiting! Status: %x\n", Status);
}
DPRINT("Client Fcb: %p\n", Fcb->OtherSide);
return STATUS_PIPE_CONNECTED;
return Status;
}
@ -114,6 +123,7 @@ NpfsDisconnectPipe(PNPFS_FCB Fcb)
if (Fcb->PipeState == FILE_PIPE_CONNECTED_STATE)
{
Fcb->PipeState = FILE_PIPE_DISCONNECTED_STATE;
/* FIXME: Shouldn't this be FILE_PIPE_CLOSING_STATE? */
Fcb->OtherSide->PipeState = FILE_PIPE_DISCONNECTED_STATE;
/* FIXME: remove data queue(s) */
@ -128,6 +138,7 @@ NpfsDisconnectPipe(PNPFS_FCB Fcb)
if (Fcb->PipeState == FILE_PIPE_CLOSING_STATE)
{
Fcb->PipeState = FILE_PIPE_DISCONNECTED_STATE;
Fcb->OtherSide = NULL;
/* FIXME: remove data queue(s) */

View file

@ -1,4 +1,4 @@
/* $Id: npfs.h,v 1.15 2004/04/12 13:03:29 navaraf Exp $ */
/* $Id: npfs.h,v 1.16 2004/05/05 18:30:16 navaraf Exp $ */
#ifndef __SERVICES_FS_NP_NPFS_H
#define __SERVICES_FS_NP_NPFS_H
@ -17,10 +17,9 @@ typedef struct
{
UNICODE_STRING PipeName;
LIST_ENTRY PipeListEntry;
KSPIN_LOCK FcbListLock;
KMUTEX FcbListLock;
LIST_ENTRY ServerFcbListHead;
LIST_ENTRY ClientFcbListHead;
ULONG ReferenceCount;
ULONG PipeType;
ULONG PipeReadMode;
ULONG PipeWriteMode;

View file

@ -1,4 +1,4 @@
/* $Id: rw.c,v 1.12 2004/04/12 13:03:29 navaraf Exp $
/* $Id: rw.c,v 1.13 2004/05/05 18:30:16 navaraf Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -290,7 +290,7 @@ NpfsWrite(PDEVICE_OBJECT DeviceObject,
DPRINT("Finished waiting (%S)! Status: %x\n", Pipe->PipeName.Buffer, Status);
KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
}
if (Pipe->PipeReadMode == FILE_PIPE_BYTE_STREAM_MODE)
if (Pipe->PipeWriteMode == FILE_PIPE_BYTE_STREAM_MODE)
{
DPRINT("Byte stream mode\n");
while (Length > 0 && Fcb->WriteQuotaAvailable > 0)