reactos/drivers/filesystems/ntfs/dispatch.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 2008 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
  18  *
  19  * COPYRIGHT:        See COPYING in the top level directory
  20  * PROJECT:          ReactOS kernel
  21  * FILE:             drivers/filesystem/ntfs/dispatch.c
  22  * PURPOSE:          NTFS filesystem driver
  23  * PROGRAMMER:       Pierre Schweitzer
  24  * UPDATE HISTORY:
  25  */
  26
  27 /* INCLUDES *****************************************************************/
  28
  29 #include "ntfs.h"
  30
  31 #define NDEBUG
  32 #include <debug.h>
  33
  34 /* FUNCTIONS ****************************************************************/
  35
  36 static
  37 NTSTATUS
  38 NtfsDispatch(PNTFS_IRP_CONTEXT IrpContext)
  39 {
  40     PIRP Irp = IrpContext->Irp;
  41     NTSTATUS Status = STATUS_UNSUCCESSFUL;
  42
  43     TRACE_(NTFS, "NtfsDispatch()\n");
  44
  45     FsRtlEnterFileSystem();
  46
  47     NtfsIsIrpTopLevel(Irp);
  48
  49     switch (IrpContext->MajorFunction)
  50     {
  51         case IRP_MJ_QUERY_VOLUME_INFORMATION:
  52             Status = NtfsQueryVolumeInformation(IrpContext);
  53             break;
  54
  55         case IRP_MJ_SET_VOLUME_INFORMATION:
  56             Status = NtfsSetVolumeInformation(IrpContext);
  57             break;
  58
  59         case IRP_MJ_QUERY_INFORMATION:
  60             Status = NtfsQueryInformation(IrpContext);
  61             break;
  62
  63         case IRP_MJ_DIRECTORY_CONTROL:
  64             Status = NtfsDirectoryControl(IrpContext);
  65             break;
  66
  67         case IRP_MJ_READ:
  68             Status = NtfsRead(IrpContext);
  69             break;
  70
  71         case IRP_MJ_DEVICE_CONTROL:
  72             Status = NtfsDeviceControl(IrpContext);
  73              break;
  74
  75         case IRP_MJ_WRITE:
  76             Status = NtfsWrite(IrpContext);
  77             break;
  78     }
  79
  80     ASSERT((!(IrpContext->Flags & IRPCONTEXT_COMPLETE) && !(IrpContext->Flags & IRPCONTEXT_QUEUE)) ||
  81            ((IrpContext->Flags & IRPCONTEXT_COMPLETE) && !(IrpContext->Flags & IRPCONTEXT_QUEUE)) ||
  82            (!(IrpContext->Flags & IRPCONTEXT_COMPLETE) && (IrpContext->Flags & IRPCONTEXT_QUEUE)));
  83
  84     if (IrpContext->Flags & IRPCONTEXT_COMPLETE)
  85     {
  86         Irp->IoStatus.Status = Status;
  87         IoCompleteRequest(Irp, IrpContext->PriorityBoost);
  88     }
  89
  90     if (IrpContext)
  91         ExFreePoolWithTag(IrpContext, 'PRIN');
  92
  93     IoSetTopLevelIrp(NULL);
  94     FsRtlExitFileSystem();
  95
  96     return Status;
  97 }
  98
  99 /*
 100  * FUNCTION: This function manages IRP for various major functions
 101  * ARGUMENTS:
 102  *           DriverObject = object describing this driver
 103  *           Irp = IRP to be passed to internal functions
 104  * RETURNS: Status of I/O Request
 105  */
 106 NTSTATUS
 107 NTAPI
 108 NtfsFsdDispatch(PDEVICE_OBJECT DeviceObject,
 109                 PIRP Irp)
 110 {
 111     PNTFS_IRP_CONTEXT IrpContext = NULL;
 112     NTSTATUS Status;
 113
 114     TRACE_(NTFS, "NtfsFsdDispatch()\n");
 115
 116     IrpContext = NtfsAllocateIrpContext(DeviceObject, Irp);
 117     if (IrpContext == NULL)
 118     {
 119         Status = STATUS_INSUFFICIENT_RESOURCES;
 120         Irp->IoStatus.Status = Status;
 121         IoCompleteRequest(Irp, IO_NO_INCREMENT);
 122     }
 123     else
 124     {
 125         Status = NtfsDispatch(IrpContext);
 126     }
 127
 128      return Status;
 129 }