RawQueryVolumeInformation

NTSTATUS __stdcall RawQueryVolumeInformation(_VCB *Vcb, _IRP *Irp, _IO_STACK_LOCATION *IrpSp){
  unsigned int SecurityContext; 
  union {_IRP *MasterIrp;int IrpCount;void *SystemBuffer;} v5; 
  _IRP *v6; 
  NTSTATUS FsVolumeInfo; 
  int SectorSizeInformation; 
  unsigned int v9; 
  UINT64 Length; 

  SecurityContext = (unsigned int)IrpSp->Parameters.SecurityContext;
  v5.MasterIrp = (_IRP *)Irp->AssociatedIrp;
  v6 = Irp;
  LODWORD(Length) = SecurityContext;
  switch( IrpSp->Parameters.Options )
  {
    case 1u:
      FsVolumeInfo = RawQueryFsVolumeInfo(Vcb, IrpSp->FileObject);
LABEL_3:
      SecurityContext = Length;
      SectorSizeInformation = FsVolumeInfo;
      break;
    case 3u:
      FsVolumeInfo = RawQueryFsSizeInfo(Vcb, IrpSp->FileObject, (_FILE_FS_SIZE_INFORMATION *)v5.MasterIrp, &Length);
      goto LABEL_3;
    case 4u:
      FsVolumeInfo = RawQueryFsDeviceInfo(Vcb, IrpSp->FileObject, (_FILE_FS_DEVICE_INFORMATION *)v5.MasterIrp, &Length);
      goto LABEL_3;
    case 5u:
      if( SecurityContext < 0x12 )
      {
        SectorSizeInformation = -2147483643;
      }
      else
      {
        *(_DWORD *)&v5.MasterIrp->Type = 0;
        SecurityContext -= 18;
        *(_DWORD *)&v5.MasterIrp->AllocationProcessorNumber = 0;
        LODWORD(v5.MasterIrp->MdlAddress) = 6;
        SectorSizeInformation = 0;
        HIDWORD(v5.MasterIrp->MdlAddress) = *(_DWORD *)L"RAW";
        LOWORD(v5.MasterIrp->Flags) = aRaw[2];
      }
      break;
    case 0xBu:
      SectorSizeInformation = FsRtlGetSectorSizeInformation(
                                *(_DEVICE_OBJECT **)(*((_QWORD *)Vcb + 23) + 16i64),
                                (_FILE_FS_SECTOR_SIZE_INFORMATION *)v5.MasterIrp);
      if( SectorSizeInformation >= 0 )
        SecurityContext -= 28;
      break;
    default:
      SectorSizeInformation = -1073741811;
      break;
  }
  LOBYTE(Irp) = 1;
  v9 = LODWORD(IrpSp->Parameters.SecurityContext) - SecurityContext;
  v6->IoStatus.Status = SectorSizeInformation;
  v6->IoStatus.Information = v9;
  IofCompleteRequest(v6, (_CCHAR)Irp);
  return SectorSizeInformation;
}

Referenced by: