-/* $Id: rw.c,v 1.14 2004/05/07 12:13:13 navaraf Exp $
+/* $Id$
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
- * FILE: services/fs/np/rw.c
+ * FILE: drivers/fs/np/rw.c
* PURPOSE: Named pipe filesystem
* PROGRAMMER: David Welch <welch@cwcom.net>
*/
#include <rosrtl/minmax.h>
#include "npfs.h"
-//#define NDEBUG
+#define NDEBUG
#include <debug.h>
/* FUNCTIONS *****************************************************************/
+#ifndef NDEBUG
+VOID HexDump(PUCHAR Buffer, ULONG Length)
+{
+ CHAR Line[65];
+ UCHAR ch;
+ const char Hex[] = "0123456789ABCDEF";
+ int i, j;
+
+ DbgPrint("---------------\n");
+
+ for (i = 0; i < ROUND_UP(Length, 16); i+= 16)
+ {
+ memset(Line, ' ', 64);
+ Line[64] = 0;
+
+ for (j = 0; j < 16 && j + i < Length; j++)
+ {
+ ch = Buffer[i + j];
+ Line[3*j + 0] = Hex[ch >> 4];
+ Line[3*j + 1] = Hex[ch & 0x0f];
+ Line[48 + j] = isprint(ch) ? ch : '.';
+ }
+ DbgPrint("%s\n", Line);
+ }
+ DbgPrint("---------------\n");
+}
+#endif
+
+
NTSTATUS STDCALL
-NpfsRead(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+NpfsRead(PDEVICE_OBJECT DeviceObject,
+ PIRP Irp)
{
PIO_STACK_LOCATION IoStack;
PFILE_OBJECT FileObject;
KIRQL OldIrql;
ULONG Information;
PNPFS_FCB Fcb;
- PNPFS_FCB ReadFcb;
+ PNPFS_FCB WriterFcb;
PNPFS_PIPE Pipe;
ULONG Length;
PVOID Buffer;
ULONG TempLength;
DPRINT("NpfsRead(DeviceObject %p Irp %p)\n", DeviceObject, Irp);
-
+
DeviceExt = (PNPFS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
IoStack = IoGetCurrentIrpStackLocation(Irp);
FileObject = IoStack->FileObject;
Fcb = FileObject->FsContext;
Pipe = Fcb->Pipe;
- ReadFcb = Fcb->OtherSide;
-
- if (ReadFcb == NULL)
- {
- DPRINT("Pipe is NOT connected!\n");
- if (Fcb->PipeState == FILE_PIPE_LISTENING_STATE)
- Status = STATUS_PIPE_LISTENING;
- else if (Fcb->PipeState == FILE_PIPE_DISCONNECTED_STATE)
- Status = STATUS_PIPE_DISCONNECTED;
- else
- Status = STATUS_UNSUCCESSFUL;
- Information = 0;
- goto done;
- }
+ WriterFcb = Fcb->OtherSide;
if (Irp->MdlAddress == NULL)
{
Information = 0;
goto done;
}
-
- if (ReadFcb->Data == NULL)
+
+ if (Fcb->Data == NULL)
{
DPRINT("Pipe is NOT readable!\n");
Status = STATUS_UNSUCCESSFUL;
goto done;
}
-
Status = STATUS_SUCCESS;
Length = IoStack->Parameters.Read.Length;
Information = 0;
Buffer = MmGetSystemAddressForMdl(Irp->MdlAddress);
- KeAcquireSpinLock(&ReadFcb->DataListLock, &OldIrql);
+ KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
while (1)
{
/* FIXME: check if in blocking mode */
- if (ReadFcb->ReadDataAvailable == 0)
- {
- KeResetEvent(&Fcb->Event);
- KeSetEvent(&ReadFcb->Event, IO_NO_INCREMENT, FALSE);
- KeReleaseSpinLock(&ReadFcb->DataListLock, OldIrql);
+ if (Fcb->ReadDataAvailable == 0)
+ {
+ KeResetEvent(&Fcb->Event);
+ KeSetEvent(&WriterFcb->Event, IO_NO_INCREMENT, FALSE);
+ KeReleaseSpinLock(&Fcb->DataListLock, OldIrql);
if (Information > 0)
{
Status = STATUS_SUCCESS;
goto done;
}
- if (Fcb->PipeState != FILE_PIPE_CONNECTED_STATE)
+
+ if (Fcb->PipeState != FILE_PIPE_CONNECTED_STATE)
{
DPRINT("PipeState: %x\n", Fcb->PipeState);
Status = STATUS_PIPE_BROKEN;
goto done;
}
- /* Wait for ReadEvent to become signaled */
- DPRINT("Waiting for readable data (%S)\n", Pipe->PipeName.Buffer);
- Status = KeWaitForSingleObject(&Fcb->Event,
+
+ /* Wait for ReadEvent to become signaled */
+ DPRINT("Waiting for readable data (%S)\n", Pipe->PipeName.Buffer);
+ Status = KeWaitForSingleObject(&Fcb->Event,
UserRequest,
KernelMode,
FALSE,
NULL);
- DPRINT("Finished waiting (%S)! Status: %x\n", Pipe->PipeName.Buffer, Status);
- /*
- * It's possible that the event was signaled because the
- * other side of pipe was closed.
- */
- if (Fcb->PipeState != FILE_PIPE_CONNECTED_STATE)
+ DPRINT("Finished waiting (%S)! Status: %x\n", Pipe->PipeName.Buffer, Status);
+
+ KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
+ }
+
+ if (Pipe->ReadMode == FILE_PIPE_BYTE_STREAM_MODE)
+ {
+ DPRINT("Byte stream mode\n");
+ /* Byte stream mode */
+ while (Length > 0 && Fcb->ReadDataAvailable > 0)
{
- DPRINT("PipeState: %x\n", Fcb->PipeState);
- Status = STATUS_PIPE_BROKEN;
- goto done;
+ CopyLength = RtlRosMin(Fcb->ReadDataAvailable, Length);
+ if (Fcb->ReadPtr + CopyLength <= Fcb->Data + Fcb->MaxDataLength)
+ {
+ memcpy(Buffer, Fcb->ReadPtr, CopyLength);
+ Fcb->ReadPtr += CopyLength;
+ if (Fcb->ReadPtr == Fcb->Data + Fcb->MaxDataLength)
+ {
+ Fcb->ReadPtr = Fcb->Data;
+ }
+ }
+ else
+ {
+ TempLength = Fcb->Data + Fcb->MaxDataLength - Fcb->ReadPtr;
+ memcpy(Buffer, Fcb->ReadPtr, TempLength);
+ memcpy(Buffer + TempLength, Fcb->Data, CopyLength - TempLength);
+ Fcb->ReadPtr = Fcb->Data + CopyLength - TempLength;
+ }
+
+ Buffer += CopyLength;
+ Length -= CopyLength;
+ Information += CopyLength;
+
+ Fcb->ReadDataAvailable -= CopyLength;
+ Fcb->WriteQuotaAvailable += CopyLength;
+ }
+
+ if (Length == 0)
+ {
+ KeSetEvent(&WriterFcb->Event, IO_NO_INCREMENT, FALSE);
+ break;
}
- KeAcquireSpinLock(&ReadFcb->DataListLock, &OldIrql);
}
+ else
+ {
+ DPRINT("Message mode\n");
- if (Pipe->PipeReadMode == FILE_PIPE_BYTE_STREAM_MODE)
- {
- DPRINT("Byte stream mode\n");
- /* Byte stream mode */
- while (Length > 0 && ReadFcb->ReadDataAvailable > 0)
- {
- CopyLength = RtlRosMin(ReadFcb->ReadDataAvailable, Length);
- if (ReadFcb->ReadPtr + CopyLength <= ReadFcb->Data + ReadFcb->MaxDataLength)
- {
- memcpy(Buffer, ReadFcb->ReadPtr, CopyLength);
- ReadFcb->ReadPtr += CopyLength;
- if (ReadFcb->ReadPtr == ReadFcb->Data + ReadFcb->MaxDataLength)
- {
- ReadFcb->ReadPtr = ReadFcb->Data;
- }
- }
- else
- {
- TempLength = ReadFcb->Data + ReadFcb->MaxDataLength - ReadFcb->ReadPtr;
- memcpy(Buffer, ReadFcb->ReadPtr, TempLength);
- memcpy(Buffer + TempLength, ReadFcb->Data, CopyLength - TempLength);
- ReadFcb->ReadPtr = ReadFcb->Data + CopyLength - TempLength;
- }
-
- Buffer += CopyLength;
- Length -= CopyLength;
- Information += CopyLength;
-
- ReadFcb->ReadDataAvailable -= CopyLength;
- ReadFcb->WriteQuotaAvailable += CopyLength;
- }
-
- if (Length == 0)
- {
- KeSetEvent(&ReadFcb->Event, IO_NO_INCREMENT, FALSE);
- break;
- }
- }
- else
- {
- DPRINT("Message mode\n");
-
- /* Message mode */
- if (ReadFcb->ReadDataAvailable)
- {
- /* Truncate the message if the receive buffer is too small */
- CopyLength = RtlRosMin(ReadFcb->ReadDataAvailable, Length);
- memcpy(Buffer, ReadFcb->Data, CopyLength);
+ /* Message mode */
+ if (Fcb->ReadDataAvailable)
+ {
+ /* Truncate the message if the receive buffer is too small */
+ CopyLength = RtlRosMin(Fcb->ReadDataAvailable, Length);
+ memcpy(Buffer, Fcb->Data, CopyLength);
#ifndef NDEBUG
- DPRINT("Length %d Buffer %x\n",CopyLength,Buffer);
- {
- DbgPrint("------\n");
- ULONG X;
- for (X = 0; X < CopyLength; X++)
- DbgPrint("%02x ", ((PUCHAR)Buffer)[X]);
- DbgPrint("\n");
- DbgPrint("------\n");
- }
+ DPRINT("Length %d Buffer %x\n",CopyLength,Buffer);
+ HexDump((PUCHAR)Buffer, CopyLength);
#endif
- Information = CopyLength;
- ReadFcb->ReadDataAvailable = 0;
- ReadFcb->WriteQuotaAvailable = ReadFcb->MaxDataLength;
- }
- if (Information > 0)
- {
- KeSetEvent(&ReadFcb->Event, IO_NO_INCREMENT, FALSE);
- break;
- }
- }
+ Information = CopyLength;
+ Fcb->ReadDataAvailable = 0;
+ Fcb->WriteQuotaAvailable = Fcb->MaxDataLength;
+ }
+
+ if (Information > 0)
+ {
+ KeSetEvent(&WriterFcb->Event, IO_NO_INCREMENT, FALSE);
+ break;
+ }
+ }
}
- KeReleaseSpinLock(&ReadFcb->DataListLock, OldIrql);
+
+ KeReleaseSpinLock(&Fcb->DataListLock, OldIrql);
done:
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
- return(Status);
+ DPRINT("NpfsRead done (Status %lx)\n", Status);
+
+ return Status;
}
PIO_STACK_LOCATION IoStack;
PFILE_OBJECT FileObject;
PNPFS_FCB Fcb = NULL;
+ PNPFS_FCB ReaderFcb;
PNPFS_PIPE Pipe = NULL;
PUCHAR Buffer;
NTSTATUS Status = STATUS_SUCCESS;
DPRINT("Pipe name %wZ\n", &FileObject->FileName);
Fcb = FileObject->FsContext;
+ ReaderFcb = Fcb->OtherSide;
Pipe = Fcb->Pipe;
Length = IoStack->Parameters.Write.Length;
goto done;
}
- if (Fcb->OtherSide == NULL)
+ if (ReaderFcb == NULL)
{
DPRINT("Pipe is NOT connected!\n");
if (Fcb->PipeState == FILE_PIPE_LISTENING_STATE)
Length = 0;
goto done;
}
-
- if (Fcb->Data == NULL)
+
+ if (ReaderFcb->Data == NULL)
{
DPRINT("Pipe is NOT writable!\n");
Status = STATUS_UNSUCCESSFUL;
Status = STATUS_SUCCESS;
Buffer = MmGetSystemAddressForMdl (Irp->MdlAddress);
+
+ KeAcquireSpinLock(&ReaderFcb->DataListLock, &OldIrql);
#ifndef NDEBUG
DPRINT("Length %d Buffer %x Offset %x\n",Length,Buffer,Offset);
- {
- DbgPrint("------\n");
- ULONG X;
- for (X = 0; X < Length; X++)
- DbgPrint("%02x ", Buffer[X]);
- DbgPrint("\n");
- DbgPrint("------\n");
- }
+ HexDump(Buffer, Length);
#endif
- KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
while(1)
{
- if (Fcb->WriteQuotaAvailable == 0)
- {
- KeResetEvent(&Fcb->Event);
- KeSetEvent(&Fcb->OtherSide->Event, IO_NO_INCREMENT, FALSE);
- KeReleaseSpinLock(&Fcb->DataListLock, OldIrql);
- if (Fcb->PipeState != FILE_PIPE_CONNECTED_STATE)
+ if (ReaderFcb->WriteQuotaAvailable == 0)
+ {
+ KeResetEvent(&Fcb->Event);
+ KeSetEvent(&ReaderFcb->Event, IO_NO_INCREMENT, FALSE);
+ KeReleaseSpinLock(&ReaderFcb->DataListLock, OldIrql);
+ if (Fcb->PipeState != FILE_PIPE_CONNECTED_STATE)
{
Status = STATUS_PIPE_BROKEN;
goto done;
}
- DPRINT("Waiting for buffer space (%S)\n", Pipe->PipeName.Buffer);
- Status = KeWaitForSingleObject(&Fcb->Event,
+
+ DPRINT("Waiting for buffer space (%S)\n", Pipe->PipeName.Buffer);
+ Status = KeWaitForSingleObject(&Fcb->Event,
UserRequest,
KernelMode,
FALSE,
NULL);
- DPRINT("Finished waiting (%S)! Status: %x\n", Pipe->PipeName.Buffer, Status);
- /*
- * It's possible that the event was signaled because the
- * other side of pipe was closed.
- */
- if (Fcb->PipeState != FILE_PIPE_CONNECTED_STATE)
+ DPRINT("Finished waiting (%S)! Status: %x\n", Pipe->PipeName.Buffer, Status);
+
+ /*
+ * It's possible that the event was signaled because the
+ * other side of pipe was closed.
+ */
+ if (Fcb->PipeState != FILE_PIPE_CONNECTED_STATE)
{
DPRINT("PipeState: %x\n", Fcb->PipeState);
Status = STATUS_PIPE_BROKEN;
goto done;
}
- KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
- }
- if (Pipe->PipeWriteMode == FILE_PIPE_BYTE_STREAM_MODE)
- {
- DPRINT("Byte stream mode\n");
- while (Length > 0 && Fcb->WriteQuotaAvailable > 0)
+ KeAcquireSpinLock(&ReaderFcb->DataListLock, &OldIrql);
+ }
+
+ if (Pipe->WriteMode == FILE_PIPE_BYTE_STREAM_MODE)
+ {
+ DPRINT("Byte stream mode\n");
+ while (Length > 0 && ReaderFcb->WriteQuotaAvailable > 0)
{
- CopyLength = RtlRosMin(Length, Fcb->WriteQuotaAvailable);
- if (Fcb->WritePtr + CopyLength <= Fcb->Data + Fcb->MaxDataLength)
- {
- memcpy(Fcb->WritePtr, Buffer, CopyLength);
- Fcb->WritePtr += CopyLength;
- if (Fcb->WritePtr == Fcb->Data + Fcb->MaxDataLength)
+ CopyLength = RtlRosMin(Length, ReaderFcb->WriteQuotaAvailable);
+ if (ReaderFcb->WritePtr + CopyLength <= ReaderFcb->Data + ReaderFcb->MaxDataLength)
+ {
+ memcpy(ReaderFcb->WritePtr, Buffer, CopyLength);
+ ReaderFcb->WritePtr += CopyLength;
+ if (ReaderFcb->WritePtr == ReaderFcb->Data + ReaderFcb->MaxDataLength)
{
- Fcb->WritePtr = Fcb->Data;
+ ReaderFcb->WritePtr = ReaderFcb->Data;
}
}
else
- {
- TempLength = Fcb->Data + Fcb->MaxDataLength - Fcb->WritePtr;
- memcpy(Fcb->WritePtr, Buffer, TempLength);
- memcpy(Fcb->Data, Buffer + TempLength, CopyLength - TempLength);
- Fcb->WritePtr = Fcb->Data + CopyLength - TempLength;
+ {
+ TempLength = ReaderFcb->Data + ReaderFcb->MaxDataLength - ReaderFcb->WritePtr;
+ memcpy(ReaderFcb->WritePtr, Buffer, TempLength);
+ memcpy(ReaderFcb->Data, Buffer + TempLength, CopyLength - TempLength);
+ ReaderFcb->WritePtr = ReaderFcb->Data + CopyLength - TempLength;
}
-
+
Buffer += CopyLength;
Length -= CopyLength;
- Information += CopyLength;
+ Information += CopyLength;
- Fcb->ReadDataAvailable += CopyLength;
- Fcb->WriteQuotaAvailable -= CopyLength;
+ ReaderFcb->ReadDataAvailable += CopyLength;
+ ReaderFcb->WriteQuotaAvailable -= CopyLength;
}
if (Length == 0)
{
- KeSetEvent(&Fcb->OtherSide->Event, IO_NO_INCREMENT, FALSE);
+ KeSetEvent(&ReaderFcb->Event, IO_NO_INCREMENT, FALSE);
break;
}
}
else
- {
- if (Length > 0)
+ {
+ DPRINT("Message mode\n");
+ if (Length > 0)
{
- CopyLength = RtlRosMin(Length, Fcb->WriteQuotaAvailable);
- memcpy(Fcb->Data, Buffer, CopyLength);
+ CopyLength = RtlRosMin(Length, ReaderFcb->WriteQuotaAvailable);
+ memcpy(ReaderFcb->Data, Buffer, CopyLength);
Information = CopyLength;
- Fcb->ReadDataAvailable = CopyLength;
- Fcb->WriteQuotaAvailable = 0;
+ ReaderFcb->ReadDataAvailable = CopyLength;
+ ReaderFcb->WriteQuotaAvailable = 0;
}
+
if (Information > 0)
{
- KeSetEvent(&Fcb->OtherSide->Event, IO_NO_INCREMENT, FALSE);
+ KeSetEvent(&ReaderFcb->Event, IO_NO_INCREMENT, FALSE);
break;
}
}
}
- KeReleaseSpinLock(&Fcb->DataListLock, OldIrql);
+
+ KeReleaseSpinLock(&ReaderFcb->DataListLock, OldIrql);
done:
Irp->IoStatus.Status = Status;
Irp->IoStatus.Information = Information;
-
+
IoCompleteRequest(Irp, IO_NO_INCREMENT);
- return(Status);
+ DPRINT("NpfsWrite done (Status %lx)\n", Status);
+
+ return Status;
}
/* EOF */
projects / reactos.git / blobdiff