reactos/ntoskrnl/io/iomgr.c

   1 /*
   2  * COPYRIGHT:            See COPYING in the top level directory
   3  * PROJECT:              ReactOS kernel
   4  * FILE:                 ntoskrnl/io/iomgr.c
   5  * PURPOSE:              Initializes the io manager
   6  * PROGRAMMER:           David Welch (welch@mcmail.com)
   7  * REVISION HISTORY:
   8  *             29/07/98: Created
   9  */
  10
  11 /* INCLUDES ****************************************************************/
  12
  13 #include <windows.h>
  14 #include <ddk/ntddk.h>
  15 #include <internal/ob.h>
  16 #include <internal/io.h>
  17
  18 #define NDEBUG
  19 #include <internal/debug.h>
  20
  21 /* GLOBALS *******************************************************************/
  22
  23 POBJECT_TYPE IoDeviceType = NULL;
  24 POBJECT_TYPE IoFileType = NULL;
  25
  26
  27 /* FUNCTIONS ****************************************************************/
  28
  29 VOID IopCloseFile(PVOID ObjectBody)
  30 {
  31    PFILE_OBJECT FileObject = (PFILE_OBJECT)ObjectBody;
  32
  33    if (FileObject->FileName.Buffer != NULL)
  34      {
  35         ExFreePool(FileObject->FileName.Buffer);
  36      }
  37 }
  38
  39 VOID IoInit(VOID)
  40 {
  41    OBJECT_ATTRIBUTES attr;
  42    HANDLE handle;
  43    UNICODE_STRING UnicodeString;
  44    ANSI_STRING AnsiString;
  45
  46    /*
  47     * Register iomgr types
  48     */
  49    IoDeviceType = ExAllocatePool(NonPagedPool,sizeof(OBJECT_TYPE));
  50
  51    IoDeviceType->TotalObjects = 0;
  52    IoDeviceType->TotalHandles = 0;
  53    IoDeviceType->MaxObjects = ULONG_MAX;
  54    IoDeviceType->MaxHandles = ULONG_MAX;
  55    IoDeviceType->PagedPoolCharge = 0;
  56    IoDeviceType->NonpagedPoolCharge = sizeof(DEVICE_OBJECT);
  57    IoDeviceType->Dump = NULL;
  58    IoDeviceType->Open = NULL;
  59    IoDeviceType->Close = NULL;
  60    IoDeviceType->Delete = NULL;
  61    IoDeviceType->Parse = NULL;
  62    IoDeviceType->Security = NULL;
  63    IoDeviceType->QueryName = NULL;
  64    IoDeviceType->OkayToClose = NULL;
  65
  66    RtlInitAnsiString(&AnsiString,"Device");
  67    RtlAnsiStringToUnicodeString(&IoDeviceType->TypeName,&AnsiString,TRUE);
  68
  69    IoFileType = ExAllocatePool(NonPagedPool,sizeof(OBJECT_TYPE));
  70
  71    IoFileType->TotalObjects = 0;
  72    IoFileType->TotalHandles = 0;
  73    IoFileType->MaxObjects = ULONG_MAX;
  74    IoFileType->MaxHandles = ULONG_MAX;
  75    IoFileType->PagedPoolCharge = 0;
  76    IoFileType->NonpagedPoolCharge = sizeof(FILE_OBJECT);
  77    IoFileType->Dump = NULL;
  78    IoFileType->Open = NULL;
  79    IoFileType->Close = IopCloseFile;
  80    IoFileType->Delete = NULL;
  81    IoFileType->Parse = NULL;
  82    IoFileType->Security = NULL;
  83    IoFileType->QueryName = NULL;
  84    IoFileType->OkayToClose = NULL;
  85
  86    RtlInitAnsiString(&AnsiString,"File");
  87    RtlAnsiStringToUnicodeString(&IoFileType->TypeName,&AnsiString,TRUE);
  88
  89    /*
  90     * Create the device directory
  91     */
  92    RtlInitAnsiString(&AnsiString,"\\Device");
  93    RtlAnsiStringToUnicodeString(&UnicodeString,&AnsiString,TRUE);
  94    InitializeObjectAttributes(&attr,&UnicodeString,0,NULL,NULL);
  95    ZwCreateDirectoryObject(&handle,0,&attr);
  96
  97    RtlInitAnsiString(&AnsiString,"\\??");
  98    RtlAnsiStringToUnicodeString(&UnicodeString,&AnsiString,TRUE);
  99    InitializeObjectAttributes(&attr,&UnicodeString,0,NULL,NULL);
 100    ZwCreateDirectoryObject(&handle,0,&attr);
 101
 102    IoInitCancelHandling();
 103    IoInitSymbolicLinkImplementation();
 104    IoInitFileSystemImplementation();
 105 }