reactos/drivers/network/afd/afd/main.c

   1 /* $Id$
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * FILE:             drivers/net/afd/afd/main.c
   5  * PURPOSE:          Ancillary functions driver
   6  * PROGRAMMER:       Art Yerkes (ayerkes@speakeasy.net)
   7  * UPDATE HISTORY:
   8  * 20040630 Created
   9  *
  10  * Suggestions: Uniform naming (AfdXxx)
  11  */
  12
  13 /* INCLUDES */
  14
  15 #include "afd.h"
  16 #include "tdi_proto.h"
  17 #include "tdiconn.h"
  18 #include "debug.h"
  19
  20 #ifdef DBG
  21
  22 /* See debug.h for debug/trace constants */
  23 //DWORD DebugTraceLevel = DEBUG_ULTRA;
  24 DWORD DebugTraceLevel = 0;
  25
  26 #endif /* DBG */
  27
  28 void OskitDumpBuffer( PCHAR Data, UINT Len ) {
  29     unsigned int i;
  30
  31     for( i = 0; i < Len; i++ ) {
  32         if( i && !(i & 0xf) ) DbgPrint( "\n" );
  33         if( !(i & 0xf) ) DbgPrint( "%08x: ", (UINT)(Data + i) );
  34         DbgPrint( " %02x", Data[i] & 0xff );
  35     }
  36     DbgPrint("\n");
  37 }
  38
  39 /* FUNCTIONS */
  40
  41 NTSTATUS STDCALL
  42 DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath);
  43
  44 static NTSTATUS STDCALL
  45 AfdCreateSocket(PDEVICE_OBJECT DeviceObject, PIRP Irp,
  46                 PIO_STACK_LOCATION IrpSp) {
  47     PAFD_FCB FCB;
  48     PFILE_OBJECT FileObject;
  49     PAFD_DEVICE_EXTENSION DeviceExt;
  50     PFILE_FULL_EA_INFORMATION EaInfo;
  51     PAFD_CREATE_PACKET ConnectInfo = NULL;
  52     ULONG EaLength;
  53     PWCHAR EaInfoValue = NULL;
  54     UINT Disposition, i;
  55
  56     AFD_DbgPrint(MID_TRACE,
  57                  ("AfdCreate(DeviceObject %p Irp %p)\n", DeviceObject, Irp));
  58
  59     DeviceExt = DeviceObject->DeviceExtension;
  60     FileObject = IrpSp->FileObject;
  61     Disposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
  62
  63     Irp->IoStatus.Information = 0;
  64
  65     EaInfo = Irp->AssociatedIrp.SystemBuffer;
  66
  67     if( EaInfo ) {
  68         ConnectInfo = (PAFD_CREATE_PACKET)(EaInfo->EaName + EaInfo->EaNameLength + 1);
  69         EaInfoValue = (PWCHAR)(((PCHAR)ConnectInfo) + sizeof(AFD_CREATE_PACKET));
  70
  71         EaLength = sizeof(FILE_FULL_EA_INFORMATION) +
  72             EaInfo->EaNameLength +
  73             EaInfo->EaValueLength;
  74
  75         AFD_DbgPrint(MID_TRACE,("EaInfo: %x, EaInfoValue: %x\n",
  76                                 EaInfo, EaInfoValue));
  77     }
  78
  79     AFD_DbgPrint(MID_TRACE,("About to allocate the new FCB\n"));
  80
  81     FCB = ExAllocatePool(NonPagedPool, sizeof(AFD_FCB));
  82     if( FCB == NULL ) {
  83         Irp->IoStatus.Status = STATUS_NO_MEMORY;
  84         IoCompleteRequest(Irp, IO_NO_INCREMENT);
  85         return STATUS_NO_MEMORY;
  86     }
  87
  88     AFD_DbgPrint(MID_TRACE,("Initializing the new FCB @ %x (FileObject %x Flags %x)\n", FCB, FileObject, ConnectInfo ? ConnectInfo->EndpointFlags : 0));
  89
  90     RtlZeroMemory( FCB, sizeof( *FCB ) );
  91
  92     FCB->Flags = ConnectInfo ? ConnectInfo->EndpointFlags : 0;
  93     FCB->State = SOCKET_STATE_CREATED;
  94     FCB->FileObject = FileObject;
  95     FCB->DeviceExt = DeviceExt;
  96     FCB->Recv.Size = DEFAULT_RECEIVE_WINDOW_SIZE;
  97     FCB->Send.Size = DEFAULT_SEND_WINDOW_SIZE;
  98
  99     KeInitializeSpinLock( &FCB->SpinLock );
 100     ExInitializeFastMutex( &FCB->Mutex );
 101     KeInitializeEvent( &FCB->StateLockedEvent, NotificationEvent, FALSE );
 102
 103     for( i = 0; i < MAX_FUNCTIONS; i++ ) {
 104         InitializeListHead( &FCB->PendingIrpList[i] );
 105     }
 106
 107     InitializeListHead( &FCB->DatagramList );
 108     InitializeListHead( &FCB->PendingConnections );
 109
 110     AFD_DbgPrint(MID_TRACE,("%x: Checking command channel\n", FCB));
 111
 112     if( ConnectInfo ) {
 113         FCB->TdiDeviceName.Length = ConnectInfo->SizeOfTransportName;
 114         FCB->TdiDeviceName.MaximumLength = FCB->TdiDeviceName.Length;
 115         FCB->TdiDeviceName.Buffer =
 116             ExAllocatePool( NonPagedPool, FCB->TdiDeviceName.Length );
 117         RtlCopyMemory( FCB->TdiDeviceName.Buffer,
 118                        ConnectInfo->TransportName,
 119                        FCB->TdiDeviceName.Length );
 120
 121         if( !FCB->TdiDeviceName.Buffer ) {
 122             ExFreePool(FCB);
 123             AFD_DbgPrint(MID_TRACE,("Could not copy target string\n"));
 124             Irp->IoStatus.Status = STATUS_NO_MEMORY;
 125             IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
 126             return STATUS_NO_MEMORY;
 127         }
 128
 129         AFD_DbgPrint(MID_TRACE,("Success: %s %wZ\n",
 130                                 EaInfo->EaName, &FCB->TdiDeviceName));
 131     } else {
 132         AFD_DbgPrint(MID_TRACE,("Success: Control connection\n"));
 133     }
 134
 135     FileObject->FsContext = FCB;
 136
 137     /* It seems that UDP sockets are writable from inception */
 138     if( FCB->Flags & SGID_CONNECTIONLESS ) {
 139         AFD_DbgPrint(MID_TRACE,("Packet oriented socket\n"));
 140         /* Allocate our backup buffer */
 141         FCB->Recv.Window = ExAllocatePool( NonPagedPool, FCB->Recv.Size );
 142         FCB->Send.Window = ExAllocatePool( NonPagedPool, FCB->Send.Size );
 143         /* A datagram socket is always sendable */
 144         FCB->PollState |= AFD_EVENT_SEND;
 145         PollReeval( FCB->DeviceExt, FCB->FileObject );
 146     }
 147
 148     Irp->IoStatus.Status = STATUS_SUCCESS;
 149     IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
 150
 151     return STATUS_SUCCESS;
 152 }
 153
 154 VOID DestroySocket( PAFD_FCB FCB ) {
 155     UINT i;
 156     BOOLEAN ReturnEarly = FALSE;
 157     PAFD_IN_FLIGHT_REQUEST InFlightRequest[IN_FLIGHT_REQUESTS];
 158
 159     AFD_DbgPrint(MIN_TRACE,("Called (%x)\n", FCB));
 160
 161     if( !SocketAcquireStateLock( FCB ) ) return;
 162
 163     FCB->State = SOCKET_STATE_CLOSED;
 164
 165     InFlightRequest[0] = &FCB->ListenIrp;
 166     InFlightRequest[1] = &FCB->ReceiveIrp;
 167     InFlightRequest[2] = &FCB->SendIrp;
 168     InFlightRequest[3] = &FCB->ConnectIrp;
 169
 170     /* Return early here because we might be called in the mean time. */
 171     if( FCB->Critical ||
 172         FCB->ListenIrp.InFlightRequest ||
 173         FCB->ReceiveIrp.InFlightRequest ||
 174         FCB->SendIrp.InFlightRequest ||
 175         FCB->ConnectIrp.InFlightRequest ) {
 176         AFD_DbgPrint(MIN_TRACE,("Leaving socket alive (%x %x %x %x)\n",
 177                                 FCB->ListenIrp.InFlightRequest,
 178                                 FCB->ReceiveIrp.InFlightRequest,
 179                                 FCB->SendIrp.InFlightRequest,
 180                                 FCB->ConnectIrp.InFlightRequest));
 181         ReturnEarly = TRUE;
 182     }
 183
 184     /* After PoolReeval, this FCB should not be involved in any outstanding
 185      * poll requests */
 186
 187     /* Cancel our pending requests */
 188     for( i = 0; i < IN_FLIGHT_REQUESTS; i++ ) {
 189         if( InFlightRequest[i]->InFlightRequest ) {
 190             AFD_DbgPrint(MID_TRACE,("Cancelling in flight irp %d (%x)\n",
 191                                     i, InFlightRequest[i]->InFlightRequest));
 192             InFlightRequest[i]->InFlightRequest->IoStatus.Status = STATUS_CANCELLED;
 193             InFlightRequest[i]->InFlightRequest->IoStatus.Information = 0;
 194             IoCancelIrp( InFlightRequest[i]->InFlightRequest );
 195         }
 196     }
 197
 198     SocketStateUnlock( FCB );
 199
 200     if( ReturnEarly ) return;
 201
 202     if( FCB->Recv.Window )
 203         ExFreePool( FCB->Recv.Window );
 204     if( FCB->Send.Window )
 205         ExFreePool( FCB->Send.Window );
 206     if( FCB->AddressFrom )
 207         ExFreePool( FCB->AddressFrom );
 208     if( FCB->LocalAddress )
 209         ExFreePool( FCB->LocalAddress );
 210
 211     ExFreePool(FCB->TdiDeviceName.Buffer);
 212
 213     ExFreePool(FCB);
 214     AFD_DbgPrint(MIN_TRACE,("Deleted (%x)\n", FCB));
 215
 216     AFD_DbgPrint(MIN_TRACE,("Leaving\n"));
 217 }
 218
 219 static NTSTATUS STDCALL
 220 AfdCloseSocket(PDEVICE_OBJECT DeviceObject, PIRP Irp,
 221                PIO_STACK_LOCATION IrpSp)
 222 {
 223     PFILE_OBJECT FileObject = IrpSp->FileObject;
 224     PAFD_FCB FCB = FileObject->FsContext;
 225
 226     AFD_DbgPrint(MID_TRACE,
 227                  ("AfdClose(DeviceObject %p Irp %p)\n", DeviceObject, Irp));
 228
 229     AFD_DbgPrint(MID_TRACE,("FCB %x\n", FCB));
 230
 231     FCB->PollState |= AFD_EVENT_CLOSE;
 232     PollReeval( FCB->DeviceExt, FileObject );
 233     KillSelectsForFCB( FCB->DeviceExt, FileObject, FALSE );
 234
 235     if( FCB->EventSelect ) ObDereferenceObject( FCB->EventSelect );
 236
 237     FileObject->FsContext = NULL;
 238     DestroySocket( FCB );
 239
 240     Irp->IoStatus.Status = STATUS_SUCCESS;
 241     Irp->IoStatus.Information = 0;
 242     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 243
 244     AFD_DbgPrint(MID_TRACE, ("Returning success.\n"));
 245
 246     return STATUS_SUCCESS;
 247 }
 248
 249 static NTSTATUS STDCALL
 250 AfdDisconnect(PDEVICE_OBJECT DeviceObject, PIRP Irp,
 251               PIO_STACK_LOCATION IrpSp) {
 252     PFILE_OBJECT FileObject = IrpSp->FileObject;
 253     PAFD_FCB FCB = FileObject->FsContext;
 254     PAFD_DISCONNECT_INFO DisReq;
 255     IO_STATUS_BLOCK Iosb;
 256     PTDI_CONNECTION_INFORMATION ConnInfo;
 257     NTSTATUS Status;
 258     USHORT Flags = 0;
 259
 260     if( !SocketAcquireStateLock( FCB ) ) return LostSocket( Irp );
 261
 262     if( !(DisReq = LockRequest( Irp, IrpSp )) )
 263         return UnlockAndMaybeComplete( FCB, STATUS_NO_MEMORY,
 264                                        Irp, 0, NULL );
 265
 266     if (NULL == FCB->RemoteAddress)
 267       {
 268         ConnInfo = NULL;
 269       }
 270     else
 271       {
 272         Status = TdiBuildNullConnectionInfo
 273             ( &ConnInfo, FCB->RemoteAddress->Address[0].AddressType );
 274
 275         if( !NT_SUCCESS(Status) || !ConnInfo )
 276             return UnlockAndMaybeComplete( FCB, STATUS_NO_MEMORY,
 277                                            Irp, 0, NULL );
 278       }
 279
 280     if( DisReq->DisconnectType & AFD_DISCONNECT_SEND )
 281         Flags |= TDI_DISCONNECT_RELEASE;
 282     if( DisReq->DisconnectType & AFD_DISCONNECT_RECV ||
 283         DisReq->DisconnectType & AFD_DISCONNECT_ABORT )
 284         Flags |= TDI_DISCONNECT_ABORT;
 285
 286     Status = TdiDisconnect( FCB->Connection.Object,
 287                             &DisReq->Timeout,
 288                             Flags,
 289                             &Iosb,
 290                             NULL,
 291                             NULL,
 292                             FCB->AddressFrom,
 293                             ConnInfo);
 294
 295     if (ConnInfo) ExFreePool( ConnInfo );
 296
 297     return UnlockAndMaybeComplete( FCB, Status, Irp, 0, NULL );
 298 }
 299
 300 static NTSTATUS STDCALL
 301 AfdDispatch(PDEVICE_OBJECT DeviceObject, PIRP Irp)
 302 {
 303     PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
 304     NTSTATUS Status = STATUS_SUCCESS;
 305 #ifdef DBG
 306     PFILE_OBJECT FileObject = IrpSp->FileObject;
 307 #endif
 308
 309     AFD_DbgPrint(MID_TRACE,("AfdDispatch: %d\n", IrpSp->MajorFunction));
 310     if( IrpSp->MajorFunction != IRP_MJ_CREATE) {
 311         AFD_DbgPrint(MID_TRACE,("FO %x, IrpSp->FO %x\n",
 312                                 FileObject, IrpSp->FileObject));
 313         ASSERT(FileObject == IrpSp->FileObject);
 314     }
 315
 316     switch(IrpSp->MajorFunction)
 317     {
 318         /* opening and closing handles to the device */
 319     case IRP_MJ_CREATE:
 320         /* Mostly borrowed from the named pipe file system */
 321         return AfdCreateSocket(DeviceObject, Irp, IrpSp);
 322
 323     case IRP_MJ_CLOSE:
 324         /* Ditto the borrowing */
 325         return AfdCloseSocket(DeviceObject, Irp, IrpSp);
 326
 327     /* write data */
 328     case IRP_MJ_WRITE:
 329         return AfdConnectedSocketWriteData( DeviceObject, Irp, IrpSp, TRUE );
 330
 331     /* read data */
 332     case IRP_MJ_READ:
 333         return AfdConnectedSocketReadData( DeviceObject, Irp, IrpSp, TRUE );
 334
 335     case IRP_MJ_DEVICE_CONTROL:
 336     {
 337         switch( IrpSp->Parameters.DeviceIoControl.IoControlCode ) {
 338         case IOCTL_AFD_BIND:
 339             return AfdBindSocket( DeviceObject, Irp, IrpSp );
 340
 341         case IOCTL_AFD_CONNECT:
 342             return AfdStreamSocketConnect( DeviceObject, Irp, IrpSp );
 343
 344         case IOCTL_AFD_START_LISTEN:
 345             return AfdListenSocket( DeviceObject, Irp, IrpSp );
 346
 347         case IOCTL_AFD_RECV:
 348             return AfdConnectedSocketReadData( DeviceObject, Irp, IrpSp,
 349                                                FALSE );
 350
 351         case IOCTL_AFD_SELECT:
 352             return AfdSelect( DeviceObject, Irp, IrpSp );
 353
 354         case IOCTL_AFD_EVENT_SELECT:
 355             return AfdEventSelect( DeviceObject, Irp, IrpSp );
 356
 357         case IOCTL_AFD_ENUM_NETWORK_EVENTS:
 358             return AfdEnumEvents( DeviceObject, Irp, IrpSp );
 359
 360         case IOCTL_AFD_RECV_DATAGRAM:
 361             return AfdPacketSocketReadData( DeviceObject, Irp, IrpSp );
 362
 363         case IOCTL_AFD_SEND:
 364             return AfdConnectedSocketWriteData( DeviceObject, Irp, IrpSp,
 365                                                 FALSE );
 366
 367         case IOCTL_AFD_SEND_DATAGRAM:
 368             return AfdPacketSocketWriteData( DeviceObject, Irp, IrpSp );
 369
 370         case IOCTL_AFD_GET_INFO:
 371             return AfdGetInfo( DeviceObject, Irp, IrpSp );
 372
 373         case IOCTL_AFD_GET_CONTEXT:
 374             return AfdGetContext( DeviceObject, Irp, IrpSp );
 375
 376         case IOCTL_AFD_SET_CONTEXT:
 377             return AfdSetContext( DeviceObject, Irp, IrpSp );
 378
 379         case IOCTL_AFD_WAIT_FOR_LISTEN:
 380             return AfdWaitForListen( DeviceObject, Irp, IrpSp );
 381
 382         case IOCTL_AFD_ACCEPT:
 383             return AfdAccept( DeviceObject, Irp, IrpSp );
 384
 385         case IOCTL_AFD_DISCONNECT:
 386             return AfdDisconnect( DeviceObject, Irp, IrpSp );
 387
 388         case IOCTL_AFD_GET_SOCK_NAME:
 389             return AfdGetSockOrPeerName( DeviceObject, Irp, IrpSp, TRUE );
 390
 391         case IOCTL_AFD_GET_PEER_NAME:
 392             return AfdGetSockOrPeerName( DeviceObject, Irp, IrpSp, FALSE );
 393
 394         case IOCTL_AFD_GET_TDI_HANDLES:
 395             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_TDI_HANDLES\n"));
 396             break;
 397
 398         case IOCTL_AFD_SET_INFO:
 399             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_INFO\n"));
 400             break;
 401
 402         case IOCTL_AFD_SET_CONNECT_DATA:
 403             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_DATA\n"));
 404             break;
 405
 406         case IOCTL_AFD_SET_CONNECT_OPTIONS:
 407             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_OPTIONS\n"));
 408             break;
 409
 410         case IOCTL_AFD_SET_DISCONNECT_DATA:
 411             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_DATA\n"));
 412             break;
 413
 414         case IOCTL_AFD_SET_DISCONNECT_OPTIONS:
 415             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_OPTIONS\n"));
 416             break;
 417
 418         case IOCTL_AFD_GET_CONNECT_DATA:
 419             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_CONNECT_DATA\n"));
 420             break;
 421
 422         case IOCTL_AFD_GET_CONNECT_OPTIONS:
 423             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_CONNECT_OPTIONS\n"));
 424             break;
 425
 426         case IOCTL_AFD_GET_DISCONNECT_DATA:
 427             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_DISCONNECT_DATA\n"));
 428             break;
 429
 430         case IOCTL_AFD_GET_DISCONNECT_OPTIONS:
 431             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_DISCONNECT_OPTIONS\n"));
 432             break;
 433
 434         case IOCTL_AFD_SET_CONNECT_DATA_SIZE:
 435             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_DATA_SIZE\n"));
 436             break;
 437
 438         case IOCTL_AFD_SET_CONNECT_OPTIONS_SIZE:
 439             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_CONNECT_OPTIONS_SIZE\n"));
 440             break;
 441
 442         case IOCTL_AFD_SET_DISCONNECT_DATA_SIZE:
 443             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_DATA_SIZE\n"));
 444             break;
 445
 446         case IOCTL_AFD_SET_DISCONNECT_OPTIONS_SIZE:
 447             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_SET_DISCONNECT_OPTIONS_SIZE\n"));
 448             break;
 449
 450         case IOCTL_AFD_DEFER_ACCEPT:
 451             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_DEFER_ACCEPT\n"));
 452             break;
 453
 454         case IOCTL_AFD_GET_PENDING_CONNECT_DATA:
 455             AFD_DbgPrint(MIN_TRACE, ("IOCTL_AFD_GET_PENDING_CONNECT_DATA\n"));
 456             break;
 457
 458         default:
 459             Status = STATUS_NOT_IMPLEMENTED;
 460             Irp->IoStatus.Information = 0;
 461             AFD_DbgPrint(MIN_TRACE, ("Unknown IOCTL (0x%x)\n",
 462                                      IrpSp->Parameters.DeviceIoControl.
 463                                      IoControlCode));
 464             break;
 465         }
 466         break;
 467     }
 468
 469 /* unsupported operations */
 470     default:
 471     {
 472         Status = STATUS_NOT_IMPLEMENTED;
 473         AFD_DbgPrint(MIN_TRACE,
 474                      ("Irp: Unknown Major code was %x\n",
 475                       IrpSp->MajorFunction));
 476         break;
 477     }
 478     }
 479
 480     AFD_DbgPrint(MID_TRACE, ("Returning %x\n", Status));
 481     Irp->IoStatus.Status = Status;
 482     IoCompleteRequest(Irp, IO_NO_INCREMENT);
 483
 484     return (Status);
 485 }
 486
 487 static VOID STDCALL
 488 AfdUnload(PDRIVER_OBJECT DriverObject)
 489 {
 490 }
 491
 492 NTSTATUS STDCALL
 493 DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
 494 {
 495     PDEVICE_OBJECT DeviceObject;
 496     UNICODE_STRING wstrDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Afd");
 497     PAFD_DEVICE_EXTENSION DeviceExt;
 498     NTSTATUS Status;
 499
 500     /* register driver routines */
 501     DriverObject->MajorFunction[IRP_MJ_CLOSE] = AfdDispatch;
 502     DriverObject->MajorFunction[IRP_MJ_CREATE] = AfdDispatch;
 503     DriverObject->MajorFunction[IRP_MJ_WRITE] = AfdDispatch;
 504     DriverObject->MajorFunction[IRP_MJ_READ] = AfdDispatch;
 505     DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = AfdDispatch;
 506     DriverObject->DriverUnload = AfdUnload;
 507
 508     Status = IoCreateDevice
 509         ( DriverObject,
 510           sizeof(AFD_DEVICE_EXTENSION),
 511           &wstrDeviceName,
 512           FILE_DEVICE_NAMED_PIPE,
 513           0,
 514           FALSE,
 515           &DeviceObject );
 516
 517     /* failure */
 518     if(!NT_SUCCESS(Status))
 519     {
 520         return (Status);
 521     }
 522
 523     DeviceExt = DeviceObject->DeviceExtension;
 524     KeInitializeSpinLock( &DeviceExt->Lock );
 525     InitializeListHead( &DeviceExt->Polls );
 526
 527     AFD_DbgPrint(MID_TRACE,("Device created: object %x ext %x\n",
 528                             DeviceObject, DeviceExt));
 529
 530     return (Status);
 531 }
 532
 533 /* EOF */