-/* $Id: rw.c,v 1.5 2001/11/20 20:34:29 ekohl 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>
*/
/* INCLUDES ******************************************************************/
#include <ddk/ntddk.h>
+#include <rosrtl/minmax.h>
#include "npfs.h"
#define NDEBUG
#include <debug.h>
-
/* FUNCTIONS *****************************************************************/
-static inline VOID
-NpfsFreePipeData(PNPFS_PIPE_DATA PipeData)
+#ifndef NDEBUG
+VOID HexDump(PUCHAR Buffer, ULONG Length)
{
- if (PipeData->Data)
- {
- ExFreePool(PipeData->Data);
- }
-
- ExFreeToNPagedLookasideList(&NpfsPipeDataLookasideList, PipeData);
-}
+ CHAR Line[65];
+ UCHAR ch;
+ const char Hex[] = "0123456789ABCDEF";
+ int i, j;
+ DbgPrint("---------------\n");
-static inline PNPFS_PIPE_DATA
-NpfsAllocatePipeData(PVOID Data,
- ULONG Size)
-{
- PNPFS_PIPE_DATA PipeData;
-
- PipeData = ExAllocateFromNPagedLookasideList(&NpfsPipeDataLookasideList);
- if (!PipeData)
+ for (i = 0; i < ROUND_UP(Length, 16); i+= 16)
{
- return NULL;
+ 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);
}
-
- PipeData->Data = Data;
- PipeData->Size = Size;
- PipeData->Offset = 0;
-
- return PipeData;
-}
-
-
-static inline PNPFS_PIPE_DATA
-NpfsInitializePipeData(
- PVOID Data,
- ULONG Size)
-{
- PNPFS_PIPE_DATA PipeData;
- PVOID Buffer;
-
- Buffer = ExAllocatePool(NonPagedPool, Size);
- if (!Buffer)
- {
- return NULL;
- }
-
- RtlMoveMemory(Buffer, Data, Size);
-
- PipeData = NpfsAllocatePipeData(Buffer, Size);
- if (!PipeData)
- {
- ExFreePool(Buffer);
- }
-
- return PipeData;
+ DbgPrint("---------------\n");
}
+#endif
NTSTATUS STDCALL
-NpfsRead(PDEVICE_OBJECT DeviceObject, PIRP Irp)
+NpfsRead(PDEVICE_OBJECT DeviceObject,
+ PIRP Irp)
{
PIO_STACK_LOCATION IoStack;
PFILE_OBJECT FileObject;
NTSTATUS Status;
PNPFS_DEVICE_EXTENSION DeviceExt;
- PWSTR PipeName;
KIRQL OldIrql;
- PLIST_ENTRY CurrentEntry;
- PNPFS_PIPE_DATA Current;
ULONG Information;
PNPFS_FCB Fcb;
- PNPFS_FCB ReadFcb;
+ PNPFS_FCB WriterFcb;
PNPFS_PIPE Pipe;
ULONG Length;
PVOID Buffer;
ULONG CopyLength;
- BOOLEAN DataListEmpty;
+ 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;
+ WriterFcb = Fcb->OtherSide;
- if (ReadFcb == NULL)
+ if (Irp->MdlAddress == NULL)
{
- DPRINT("Pipe is NOT connected!\n");
+ DPRINT("Irp->MdlAddress == NULL\n");
Status = STATUS_UNSUCCESSFUL;
- Length = 0;
+ Information = 0;
goto done;
}
- if (Irp->MdlAddress == NULL)
+ if (Fcb->Data == NULL)
{
- DPRINT("Irp->MdlAddress == NULL\n");
+ DPRINT("Pipe is NOT readable!\n");
Status = STATUS_UNSUCCESSFUL;
- Length = 0;
+ Information = 0;
goto done;
}
Status = STATUS_SUCCESS;
Length = IoStack->Parameters.Read.Length;
+ Information = 0;
Buffer = MmGetSystemAddressForMdl(Irp->MdlAddress);
- DPRINT("Length %d Buffer %x\n",Length,Buffer);
-
- KeAcquireSpinLock(&ReadFcb->DataListLock, &OldIrql);
- DataListEmpty = IsListEmpty(&ReadFcb->DataListHead);
- KeReleaseSpinLock(&ReadFcb->DataListLock, OldIrql);
-
- /* FIXME: check if in blocking mode */
- if (DataListEmpty == TRUE)
- {
- /* Wait for ReadEvent to become signaled */
- DPRINT("Waiting for readable data\n");
- Status = KeWaitForSingleObject(&Fcb->ReadEvent,
- UserRequest,
- KernelMode,
- FALSE,
- NULL);
- DPRINT("Finished waiting! Status: %x\n", Status);
- }
-
- KeAcquireSpinLock(&ReadFcb->DataListLock, &OldIrql);
-
- if (Pipe->PipeReadMode & FILE_PIPE_BYTE_STREAM_MODE)
+ KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
+ while (1)
{
- DPRINT("Byte stream mode\n");
-
- /* Byte stream mode */
- Information = 0;
- CurrentEntry = ReadFcb->DataListHead.Flink;
- while ((Length > 0) && (CurrentEntry = RemoveHeadList(&ReadFcb->DataListHead)))
+ /* FIXME: check if in blocking mode */
+ if (Fcb->ReadDataAvailable == 0)
{
- Current = CONTAINING_RECORD(CurrentEntry, NPFS_PIPE_DATA, ListEntry);
-
- DPRINT("Took pipe data at %p off the queue\n", Current);
-
- CopyLength = RtlMin(Current->Size, Length);
- RtlCopyMemory(Buffer,
- ((PVOID)((ULONG_PTR)Current->Data + Current->Offset)),
- CopyLength);
- Buffer += CopyLength;
- Length -= CopyLength;
- Information += CopyLength;
-
- /* Update the data buffer */
- Current->Offset += CopyLength;
- Current->Size -= CopyLength;
-
- CurrentEntry = CurrentEntry->Flink;
+ 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)
+ {
+ 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,
+ UserRequest,
+ KernelMode,
+ FALSE,
+ NULL);
+ DPRINT("Finished waiting (%S)! Status: %x\n", Pipe->PipeName.Buffer, Status);
+
+ KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
}
- if ((CurrentEntry != &ReadFcb->DataListHead) && (Current->Offset != Current->Size))
+ if (Pipe->ReadMode == FILE_PIPE_BYTE_STREAM_MODE)
{
- DPRINT("Putting pipe data at %p back in queue\n", Current);
-
- /* The caller's buffer could not contain the complete message,
- so put it back on the queue */
- InsertHeadList(&ReadFcb->DataListHead, &Current->ListEntry);
+ DPRINT("Byte stream mode\n");
+ /* Byte stream mode */
+ while (Length > 0 && Fcb->ReadDataAvailable > 0)
+ {
+ 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;
+ }
}
- }
- else
- {
- DPRINT("Message mode\n");
-
- /* Message mode */
- CurrentEntry = ReadFcb->DataListHead.Flink;
- if (CurrentEntry = RemoveHeadList(&ReadFcb->DataListHead))
+ else
{
- Current = CONTAINING_RECORD(CurrentEntry, NPFS_PIPE_DATA, ListEntry);
-
- DPRINT("Took pipe data at %p off the queue\n", Current);
-
- /* Truncate the message if the receive buffer is too small */
- CopyLength = RtlMin(Current->Size, Length);
- RtlCopyMemory(Buffer, Current->Data, CopyLength);
- Information = CopyLength;
-
- Current->Offset += CopyLength;
-
- CurrentEntry = CurrentEntry->Flink;
+ DPRINT("Message mode\n");
+
+ /* 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);
+ HexDump((PUCHAR)Buffer, CopyLength);
+#endif
+
+ Information = CopyLength;
+ Fcb->ReadDataAvailable = 0;
+ Fcb->WriteQuotaAvailable = Fcb->MaxDataLength;
+ }
+
+ if (Information > 0)
+ {
+ KeSetEvent(&WriterFcb->Event, IO_NO_INCREMENT, FALSE);
+ break;
+ }
}
}
- KeReleaseSpinLock(&ReadFcb->DataListLock, OldIrql);
-
- /* reset ReaderEvent */
- KeResetEvent(&Fcb->ReadEvent);
+ 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;
ULONG Length;
ULONG Offset;
KIRQL OldIrql;
- PNPFS_PIPE_DATA PipeData;
+ ULONG Information;
+ ULONG CopyLength;
+ ULONG TempLength;
DPRINT("NpfsWrite()\n");
DPRINT("Pipe name %wZ\n", &FileObject->FileName);
Fcb = FileObject->FsContext;
+ ReaderFcb = Fcb->OtherSide;
Pipe = Fcb->Pipe;
Length = IoStack->Parameters.Write.Length;
Offset = IoStack->Parameters.Write.ByteOffset.u.LowPart;
+ Information = 0;
if (Irp->MdlAddress == NULL)
{
- DbgPrint ("Irp->MdlAddress == NULL\n");
+ DPRINT("Irp->MdlAddress == NULL\n");
Status = STATUS_UNSUCCESSFUL;
Length = 0;
goto done;
}
- if (Fcb->OtherSide == NULL)
+ if (ReaderFcb == 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;
+ Length = 0;
+ goto done;
+ }
+
+ if (ReaderFcb->Data == NULL)
+ {
+ DPRINT("Pipe is NOT writable!\n");
Status = STATUS_UNSUCCESSFUL;
Length = 0;
goto done;
}
+ Status = STATUS_SUCCESS;
Buffer = MmGetSystemAddressForMdl (Irp->MdlAddress);
+
+ KeAcquireSpinLock(&ReaderFcb->DataListLock, &OldIrql);
+#ifndef NDEBUG
DPRINT("Length %d Buffer %x Offset %x\n",Length,Buffer,Offset);
+ HexDump(Buffer, Length);
+#endif
- PipeData = NpfsInitializePipeData(Buffer, Length);
- if (PipeData)
+ while(1)
{
- DPRINT("Attaching pipe data at %p (%d bytes)\n", PipeData, Length);
-
- KeAcquireSpinLock(&Fcb->DataListLock, &OldIrql);
- InsertTailList(&Fcb->DataListHead, &PipeData->ListEntry);
- KeReleaseSpinLock(&Fcb->DataListLock, OldIrql);
+ 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,
+ 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("PipeState: %x\n", Fcb->PipeState);
+ Status = STATUS_PIPE_BROKEN;
+ goto done;
+ }
+ KeAcquireSpinLock(&ReaderFcb->DataListLock, &OldIrql);
+ }
- /* signal the readers ReadEvent */
- KeSetEvent(&Fcb->OtherSide->ConnectEvent, IO_NO_INCREMENT, FALSE);
- }
- else
- {
- Length = 0;
- Status = STATUS_INSUFFICIENT_RESOURCES;
+ if (Pipe->WriteMode == FILE_PIPE_BYTE_STREAM_MODE)
+ {
+ DPRINT("Byte stream mode\n");
+ while (Length > 0 && ReaderFcb->WriteQuotaAvailable > 0)
+ {
+ 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)
+ {
+ ReaderFcb->WritePtr = ReaderFcb->Data;
+ }
+ }
+ else
+ {
+ 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;
+
+ ReaderFcb->ReadDataAvailable += CopyLength;
+ ReaderFcb->WriteQuotaAvailable -= CopyLength;
+ }
+
+ if (Length == 0)
+ {
+ KeSetEvent(&ReaderFcb->Event, IO_NO_INCREMENT, FALSE);
+ break;
+ }
+ }
+ else
+ {
+ DPRINT("Message mode\n");
+ if (Length > 0)
+ {
+ CopyLength = RtlRosMin(Length, ReaderFcb->WriteQuotaAvailable);
+ memcpy(ReaderFcb->Data, Buffer, CopyLength);
+
+ Information = CopyLength;
+ ReaderFcb->ReadDataAvailable = CopyLength;
+ ReaderFcb->WriteQuotaAvailable = 0;
+ }
+
+ if (Information > 0)
+ {
+ KeSetEvent(&ReaderFcb->Event, IO_NO_INCREMENT, FALSE);
+ break;
+ }
+ }
}
+ KeReleaseSpinLock(&ReaderFcb->DataListLock, OldIrql);
+
done:
Irp->IoStatus.Status = Status;
- Irp->IoStatus.Information = Length;
-
+ 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