/* $Id$
 *
 * COPYRIGHT:        See COPYING in the top level directory
 * PROJECT:          ReactOS kernel
 * FILE:             drivers/fs/vfat/flush.c
 * PURPOSE:          VFAT Filesystem
 * PROGRAMMER:       Hartmut Birr
 */

/* INCLUDES *****************************************************************/

#include <ddk/ntddk.h>
#include "vfat.h"

#define NDEBUG
#include <debug.h>

/* FUNCTIONS ****************************************************************/

NTSTATUS VfatFlushFile(PDEVICE_EXTENSION DeviceExt, PVFATFCB Fcb)
{
   IO_STATUS_BLOCK IoStatus;

   DPRINT("VfatFlushFile(DeviceExt %x, Fcb %x) for '%S'\n", DeviceExt, Fcb, Fcb->PathName);

   CcFlushCache(&Fcb->SectionObjectPointers, NULL, 0, &IoStatus);
   if (IoStatus.Status == STATUS_INVALID_PARAMETER)
   {
      /* FIXME: Caching was possible not initialized */
      IoStatus.Status = STATUS_SUCCESS;
   }
   return IoStatus.Status;
}

NTSTATUS VfatFlushVolume(PDEVICE_EXTENSION DeviceExt, PVFATFCB VolumeFcb)
{
   PLIST_ENTRY ListEntry;
   PVFATFCB Fcb;
   NTSTATUS Status, ReturnStatus = STATUS_SUCCESS;

   DPRINT("VfatFlushVolume(DeviceExt %x, FatFcb %x)\n", DeviceExt, VolumeFcb);

   ListEntry = DeviceExt->FcbListHead.Flink;
   while (ListEntry != &DeviceExt->FcbListHead)
   {
      Fcb = CONTAINING_RECORD(ListEntry, VFATFCB, FcbListEntry);
      ListEntry = ListEntry->Flink;
      ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
      Status = VfatFlushFile(DeviceExt, Fcb);
      ExReleaseResourceLite (&Fcb->MainResource);
      if (!NT_SUCCESS(Status))
      {
         DPRINT1("VfatFlushFile failed, status = %x\n", Status);
	 ReturnStatus = Status;
      }
      /* FIXME: Stop flushing if this is a removable media and the media was removed */
   }

   Fcb = (PVFATFCB) DeviceExt->FATFileObject->FsContext;
  
   ExAcquireResourceExclusiveLite(&DeviceExt->FatResource, TRUE);
   Status = VfatFlushFile(DeviceExt, Fcb);
   ExReleaseResourceLite(&DeviceExt->FatResource);

   /* FIXME: Flush the buffers from storage device */

   if (!NT_SUCCESS(Status))
   {
      DPRINT1("VfatFlushFile failed, status = %x\n", Status);
      ReturnStatus = Status;
   }

   return ReturnStatus;
}

NTSTATUS VfatFlush(PVFAT_IRP_CONTEXT IrpContext)
{
  NTSTATUS Status;
  PVFATFCB Fcb;
  /*
   * This request is not allowed on the main device object.
   */
  if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
  {
     Status = STATUS_INVALID_DEVICE_REQUEST;
     goto ByeBye;
  }

  Fcb = (PVFATFCB)IrpContext->FileObject->FsContext;
  assert(Fcb);

  if (Fcb->Flags & FCB_IS_VOLUME)
  {
     ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, TRUE);
     Status = VfatFlushVolume(IrpContext->DeviceExt, Fcb);
     ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
  }
  else
  {
     ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
     Status = VfatFlushFile(IrpContext->DeviceExt, Fcb);
     ExReleaseResourceLite (&Fcb->MainResource);
  }

ByeBye:
  IrpContext->Irp->IoStatus.Status = Status;
  IrpContext->Irp->IoStatus.Information = 0;
  IoCompleteRequest (IrpContext->Irp, IO_NO_INCREMENT);
  VfatFreeIrpContext(IrpContext);

  return (Status);
}

/* EOF */