Windows: Protect ObjectRefCnts with ObjectInfoLock
[openafs.git] / src / WINNT / afsrdr / kernel / lib / AFSClose.cpp
1 /*
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33  */
34
35 //
36 // File: AFSClose.cpp
37 //
38
39 #include "AFSCommon.h"
40
41 //
42 // Function: AFSClose
43 //
44 // Description:
45 //
46 //      This function is the IRP_MJ_CLOSE dispatch handler
47 //
48 // Return:
49 //
50 //       A status is returned for the handling of this request
51 //
52
53 NTSTATUS
54 AFSClose( IN PDEVICE_OBJECT LibDeviceObject,
55           IN PIRP Irp)
56 {
57
58     NTSTATUS ntStatus = STATUS_SUCCESS;
59     ULONG ulRequestType = 0;
60     IO_STACK_LOCATION *pIrpSp = IoGetCurrentIrpStackLocation( Irp);
61     AFSFcb *pFcb = NULL;
62     AFSDeviceExt *pDeviceExt = NULL;
63     AFSCcb *pCcb = NULL;
64     AFSObjectInfoCB *pObjectInfo = NULL;
65     AFSDirectoryCB *pDirCB = NULL;
66
67     __try
68     {
69
70         if( AFSRDRDeviceObject == NULL)
71         {
72
73             //
74             // Let this through, it's an close on the library control device
75             //
76
77             try_return( ntStatus);
78         }
79
80         pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
81
82         pIrpSp = IoGetCurrentIrpStackLocation( Irp);
83
84         pFcb = (AFSFcb *)pIrpSp->FileObject->FsContext;
85
86         if( pFcb == NULL)
87         {
88             try_return( ntStatus);
89         }
90
91         pObjectInfo = pFcb->ObjectInformation;
92
93         //
94         // Perform the close functionality depending on the type of node it is
95         //
96
97         switch( pFcb->Header.NodeTypeCode)
98         {
99
100             case AFS_IOCTL_FCB:
101             {
102
103                 AFSPIOCtlOpenCloseRequestCB stPIOCtlClose;
104                 AFSFileID stParentFileId;
105
106                 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
107                               AFS_TRACE_LEVEL_VERBOSE,
108                               "AFSClose Acquiring GlobalRoot lock %08lX EXCL %08lX\n",
109                               &pFcb->NPFcb->Resource,
110                               PsGetCurrentThread());
111
112                 AFSAcquireExcl( &pFcb->NPFcb->Resource,
113                                   TRUE);
114
115                 pCcb = (AFSCcb *)pIrpSp->FileObject->FsContext2;
116
117                 //
118                 // Send the close to the CM
119                 //
120
121                 RtlZeroMemory( &stPIOCtlClose,
122                                sizeof( AFSPIOCtlOpenCloseRequestCB));
123
124                 stPIOCtlClose.RequestId = pCcb->RequestID;
125
126                 stPIOCtlClose.RootId = pObjectInfo->VolumeCB->ObjectInformation.FileId;
127
128                 RtlZeroMemory( &stParentFileId,
129                                sizeof( AFSFileID));
130
131                 stParentFileId = pObjectInfo->ParentObjectInformation->FileId;
132
133                 //
134                 // Issue the close request to the service
135                 //
136
137                 AFSProcessRequest( AFS_REQUEST_TYPE_PIOCTL_CLOSE,
138                                    AFS_REQUEST_FLAG_SYNCHRONOUS,
139                                    &pCcb->AuthGroup,
140                                    NULL,
141                                    &stParentFileId,
142                                    (void *)&stPIOCtlClose,
143                                    sizeof( AFSPIOCtlOpenCloseRequestCB),
144                                    NULL,
145                                    NULL);
146
147                 pDirCB = pCcb->DirectoryCB;
148
149                 //
150                 // Remove the Ccb and de-allocate it
151                 //
152
153                 ntStatus = AFSRemoveCcb( pFcb,
154                                          pCcb);
155
156                 if( !NT_SUCCESS( ntStatus))
157                 {
158
159                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
160                                   AFS_TRACE_LEVEL_WARNING,
161                                   "AFSClose Failed to remove Ccb from Fcb Status %08lX\n", ntStatus);
162
163                     //
164                     // We can't actually fail a close operation so reset the status
165                     //
166
167                     ntStatus = STATUS_SUCCESS;
168                 }
169
170                 ASSERT( pDirCB->OpenReferenceCount > 0);
171
172                 InterlockedDecrement( &pDirCB->OpenReferenceCount);
173
174                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
175                               AFS_TRACE_LEVEL_VERBOSE,
176                               "AFSClose (IOCtl) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
177                               &pDirCB->NameInformation.FileName,
178                               pDirCB,
179                               pCcb,
180                               pDirCB->OpenReferenceCount);
181
182                 //
183                 // If this is not the root then decrement the open child reference count
184                 //
185
186                 if( pObjectInfo->ParentObjectInformation != NULL &&
187                     pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount > 0)
188                 {
189
190                     InterlockedDecrement( &pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
191
192                     AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
193                                   AFS_TRACE_LEVEL_VERBOSE,
194                                   "AFSClose (IOCtl) Decrement child open ref count on Parent object %08lX Cnt %d\n",
195                                   pObjectInfo->ParentObjectInformation,
196                                   pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
197                 }
198
199                 AFSReleaseResource( &pFcb->NPFcb->Resource);
200
201                 ASSERT( pFcb->OpenReferenceCount != 0);
202
203                 InterlockedDecrement( &pFcb->OpenReferenceCount);
204
205                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
206                               AFS_TRACE_LEVEL_VERBOSE,
207                               "AFSClose (IOCtl) Decrement count on Fcb %08lX Cnt %d\n",
208                               pFcb,
209                               pFcb->OpenReferenceCount);
210
211                 break;
212             }
213
214             case AFS_ROOT_ALL:
215             {
216
217                 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
218                               AFS_TRACE_LEVEL_VERBOSE,
219                               "AFSClose Acquiring Special Root ALL lock %08lX EXCL %08lX\n",
220                               &pFcb->NPFcb->Resource,
221                               PsGetCurrentThread());
222
223                 AFSAcquireExcl( &pFcb->NPFcb->Resource,
224                                 TRUE);
225
226                 pCcb = (AFSCcb *)pIrpSp->FileObject->FsContext2;
227
228                 pDirCB = pCcb->DirectoryCB;
229
230                 //
231                 // Remove the Ccb and de-allocate it
232                 //
233
234                 ntStatus = AFSRemoveCcb( pFcb,
235                                          pCcb);
236
237                 if( !NT_SUCCESS( ntStatus))
238                 {
239
240                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
241                                   AFS_TRACE_LEVEL_WARNING,
242                                   "AFSClose Failed to remove Ccb from Fcb Status %08lX\n", ntStatus);
243
244                     //
245                     // We can't actually fail a close operation so reset the status
246                     //
247
248                     ntStatus = STATUS_SUCCESS;
249                 }
250
251                 ASSERT( pDirCB->OpenReferenceCount > 0);
252
253                 InterlockedDecrement( &pDirCB->OpenReferenceCount);
254
255                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
256                               AFS_TRACE_LEVEL_VERBOSE,
257                               "AFSClose Decrement (Root ALL) count on %wZ DE %p Ccb %p Cnt %d\n",
258                               &pDirCB->NameInformation.FileName,
259                               pDirCB,
260                               pCcb,
261                               pDirCB->OpenReferenceCount);
262
263                 AFSReleaseResource( &pFcb->NPFcb->Resource);
264
265                 ASSERT( pFcb->OpenReferenceCount > 0);
266
267                 InterlockedDecrement( &pFcb->OpenReferenceCount);
268
269                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
270                               AFS_TRACE_LEVEL_VERBOSE,
271                               "AFSClose (RootAll) Decrement count on Fcb %08lX Cnt %d\n",
272                               pFcb,
273                               pFcb->OpenReferenceCount);
274
275                 break;
276             }
277
278             //
279             // Root, file or directory node
280             //
281
282             case AFS_FILE_FCB:
283             case AFS_ROOT_FCB:
284             case AFS_DIRECTORY_FCB:
285             case AFS_SYMBOLIC_LINK_FCB:
286             case AFS_MOUNT_POINT_FCB:
287             case AFS_DFS_LINK_FCB:
288             case AFS_INVALID_FCB:
289             {
290
291                 pCcb = (AFSCcb *)pIrpSp->FileObject->FsContext2;
292
293                 //
294                 // We may be performing some cleanup on the Fcb so grab it exclusive to ensure no collisions
295                 //
296
297                 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
298                               AFS_TRACE_LEVEL_VERBOSE,
299                               "AFSClose Acquiring Dcb lock %08lX EXCL %08lX\n",
300                               &pFcb->NPFcb->Resource,
301                               PsGetCurrentThread());
302
303                 AFSAcquireExcl( &pFcb->NPFcb->Resource,
304                                 TRUE);
305
306                 KeQueryTickCount( &pFcb->ObjectInformation->LastAccessCount);
307
308                 pDirCB = pCcb->DirectoryCB;
309
310                 //
311                 // If this entry is deleted then remove the object from the volume tree
312                 //
313
314                 if( BooleanFlagOn( pDirCB->Flags, AFS_DIR_ENTRY_DELETED))
315                 {
316
317                     if( pFcb->Header.NodeTypeCode == AFS_FILE_FCB)
318                     {
319
320                         //
321                         // Stop anything possibly in process
322                         //
323
324                         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
325                                       AFS_TRACE_LEVEL_VERBOSE,
326                                       "AFSClose Acquiring Fcb extents lock %08lX EXCL %08lX\n",
327                                       &pFcb->NPFcb->Specific.File.ExtentsResource,
328                                       PsGetCurrentThread());
329
330                         AFSAcquireExcl( &pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsResource,
331                                         TRUE);
332
333                         pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsRequestStatus = STATUS_FILE_DELETED;
334
335                         KeSetEvent( &pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsRequestComplete,
336                                     0,
337                                     FALSE);
338
339                         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
340                                       AFS_TRACE_LEVEL_VERBOSE,
341                                       "AFSClose Releasing Fcb extents lock %08lX EXCL %08lX\n",
342                                       &pFcb->NPFcb->Specific.File.ExtentsResource,
343                                       PsGetCurrentThread());
344
345                         AFSReleaseResource( &pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsResource);
346                     }
347
348                     AFSAcquireExcl( pObjectInfo->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
349                                     TRUE);
350
351                     AFSAcquireExcl( pObjectInfo->VolumeCB->ObjectInfoTree.TreeLock,
352                                     TRUE);
353
354                     if ( pDirCB->OpenReferenceCount == 0)
355                     {
356                         AFSDbgLogMsg( 0,
357                                       0,
358                                       "AFSClose (Other) OpenReferenceCount is Zero on DE %08lX Ccb %08lX FileName %wZ\n",
359                                       pDirCB,
360                                       pCcb,
361                                       &pDirCB->NameInformation.FileName);
362                     }
363
364                     ASSERT( pDirCB->OpenReferenceCount > 0);
365
366                     InterlockedDecrement( &pDirCB->OpenReferenceCount);
367
368                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
369                                   AFS_TRACE_LEVEL_VERBOSE,
370                                   "AFSClose (Other) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
371                                   &pDirCB->NameInformation.FileName,
372                                   pDirCB,
373                                   pCcb,
374                                   pDirCB->OpenReferenceCount);
375
376                     if( pDirCB->OpenReferenceCount == 0)
377                     {
378
379                         AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
380                                       AFS_TRACE_LEVEL_VERBOSE,
381                                       "AFSClose Deleting dir entry %08lX (%08lX) for %wZ  FID %08lX-%08lX-%08lX-%08lX\n",
382                                       pDirCB,
383                                       pObjectInfo,
384                                       &pDirCB->NameInformation.FileName,
385                                       pObjectInfo->FileId.Cell,
386                                       pObjectInfo->FileId.Volume,
387                                       pObjectInfo->FileId.Vnode,
388                                       pObjectInfo->FileId.Unique);
389
390                         //
391                         // Remove and delete the directory entry from the parent list
392                         //
393
394                         AFSDeleteDirEntry( pObjectInfo->ParentObjectInformation,
395                                            pDirCB);
396
397                         AFSAcquireShared( &pObjectInfo->NonPagedInfo->ObjectInfoLock,
398                                           TRUE);
399
400                         if( pObjectInfo->ObjectReferenceCount <= 0)
401                         {
402
403                             if( BooleanFlagOn( pObjectInfo->Flags, AFS_OBJECT_INSERTED_HASH_TREE))
404                             {
405
406                                 AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
407                                               AFS_TRACE_LEVEL_VERBOSE,
408                                               "AFSClose Removing object %08lX from volume tree\n",
409                                               pObjectInfo);
410
411                                 AFSRemoveHashEntry( &pObjectInfo->VolumeCB->ObjectInfoTree.TreeHead,
412                                                     &pObjectInfo->TreeEntry);
413
414                                 ClearFlag( pObjectInfo->Flags, AFS_OBJECT_INSERTED_HASH_TREE);
415                             }
416
417                             SetFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_DELETED);
418                         }
419
420                         AFSReleaseResource( &pObjectInfo->NonPagedInfo->ObjectInfoLock);
421                     }
422
423                     AFSReleaseResource( pObjectInfo->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
424
425                     AFSReleaseResource( pObjectInfo->VolumeCB->ObjectInfoTree.TreeLock);
426                 }
427                 else
428                 {
429
430                     ASSERT( pDirCB->OpenReferenceCount > 0);
431
432                     InterlockedDecrement( &pDirCB->OpenReferenceCount);
433
434                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
435                                   AFS_TRACE_LEVEL_VERBOSE,
436                                   "AFSClose (Other2) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
437                                   &pDirCB->NameInformation.FileName,
438                                   pDirCB,
439                                   pCcb,
440                                   pDirCB->OpenReferenceCount);
441                 }
442
443                 //
444                 // If this is not the root then decrement the open child reference count
445                 //
446
447                 if( pObjectInfo != NULL &&
448                     pObjectInfo->ParentObjectInformation != NULL &&
449                     pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount > 0)
450                 {
451
452                     InterlockedDecrement( &pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
453
454                     AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
455                                   AFS_TRACE_LEVEL_VERBOSE,
456                                   "AFSClose Decrement child open ref count on Parent object %08lX Cnt %d\n",
457                                   pObjectInfo->ParentObjectInformation,
458                                   pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
459                 }
460
461                 if( pFcb->OpenReferenceCount == 1 &&
462                     pFcb->Header.NodeTypeCode == AFS_FILE_FCB)
463                 {
464
465                     SetFlag( pFcb->Flags, AFS_FCB_FILE_CLOSED);
466
467                     //
468                     // Attempt to tear down our extent list for the file
469                     // If there are remaining dirty extents then attempt to
470                     // flush them as well
471                     //
472
473                     if( pFcb->Specific.File.ExtentsDirtyCount)
474                     {
475
476                         AFSFlushExtents( pFcb,
477                                          &pCcb->AuthGroup);
478                     }
479
480                     //
481                     // Wait for any outstanding queued flushes to complete
482                     //
483
484                     AFSWaitOnQueuedFlushes( pFcb);
485
486                     ASSERT( pFcb->Specific.File.ExtentsDirtyCount == 0 &&
487                             pFcb->Specific.File.QueuedFlushCount == 0);
488
489                     AFSReleaseResource( &pFcb->NPFcb->Resource);
490
491                     //
492                     // Tear 'em down, we'll not be needing them again
493                     //
494
495                     AFSTearDownFcbExtents( pFcb,
496                                            &pCcb->AuthGroup);
497                 }
498                 else
499                 {
500
501                     if( pFcb->Header.NodeTypeCode == AFS_FILE_FCB &&
502                         pFcb->Specific.File.ExtentsDirtyCount &&
503                         (pCcb->GrantedAccess & FILE_WRITE_DATA))
504                     {
505
506                         AFSFlushExtents( pFcb,
507                                          &pCcb->AuthGroup);
508                     }
509
510                     AFSReleaseResource( &pFcb->NPFcb->Resource);
511                 }
512
513                 //
514                 // Remove the Ccb and de-allocate it
515                 //
516
517                 ntStatus = AFSRemoveCcb( pFcb,
518                                          pCcb);
519
520                 if( !NT_SUCCESS( ntStatus))
521                 {
522
523                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
524                                   AFS_TRACE_LEVEL_WARNING,
525                                   "AFSClose Failed to remove Ccb from Fcb Status %08lX\n",
526                                   ntStatus);
527
528                     //
529                     // We can't actually fail a close operation so reset the status
530                     //
531
532                     ntStatus = STATUS_SUCCESS;
533                 }
534
535                 //
536                 // Decrement the reference count on the Fcb. this is protecting it from teardown.
537                 //
538
539                 ASSERT( pFcb->OpenReferenceCount != 0);
540
541                 InterlockedDecrement( &pFcb->OpenReferenceCount);
542
543                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
544                               AFS_TRACE_LEVEL_VERBOSE,
545                               "AFSClose Decrement count on Fcb %08lX Cnt %d\n",
546                               pFcb,
547                               pFcb->OpenReferenceCount);
548
549                 break;
550             }
551
552             case AFS_SPECIAL_SHARE_FCB:
553             {
554
555                 AFSPipeOpenCloseRequestCB stPipeClose;
556
557                 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
558                               AFS_TRACE_LEVEL_VERBOSE,
559                               "AFSClose Acquiring Special Share lock %08lX EXCL %08lX\n",
560                               &pFcb->NPFcb->Resource,
561                               PsGetCurrentThread());
562
563                 AFSAcquireExcl( &pFcb->NPFcb->Resource,
564                                 TRUE);
565
566                 pCcb = (AFSCcb *)pIrpSp->FileObject->FsContext2;
567
568                 pDirCB = pCcb->DirectoryCB;
569
570                 RtlZeroMemory( &stPipeClose,
571                                sizeof( AFSPipeOpenCloseRequestCB));
572
573                 stPipeClose.RequestId = pCcb->RequestID;
574
575                 stPipeClose.RootId = pObjectInfo->VolumeCB->ObjectInformation.FileId;
576
577                 //
578                 // Issue the open request to the service
579                 //
580
581                 /*
582                 AFSProcessRequest( AFS_REQUEST_TYPE_PIPE_CLOSE,
583                                    AFS_REQUEST_FLAG_SYNCHRONOUS,
584                                    &pFcb->AuthGroup,
585                                    &pDirCB->NameInformation.FileName,
586                                    NULL,
587                                    (void *)&stPipeClose,
588                                    sizeof( AFSPipeOpenCloseRequestCB),
589                                    NULL,
590                                    NULL);
591                 */
592
593                 //
594                 // Remove the Ccb and de-allocate it
595                 //
596
597                 ntStatus = AFSRemoveCcb( pFcb,
598                                          pCcb);
599
600                 if( !NT_SUCCESS( ntStatus))
601                 {
602
603                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
604                                   AFS_TRACE_LEVEL_WARNING,
605                                   "AFSClose Failed to remove Ccb from Fcb Status %08lX\n", ntStatus);
606
607                     //
608                     // We can't actually fail a close operation so reset the status
609                     //
610
611                     ntStatus = STATUS_SUCCESS;
612                 }
613
614                 ASSERT( pDirCB->OpenReferenceCount > 0);
615
616                 InterlockedDecrement( &pDirCB->OpenReferenceCount);
617
618                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
619                               AFS_TRACE_LEVEL_VERBOSE,
620                               "AFSClose (Share) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
621                               &pDirCB->NameInformation.FileName,
622                               pDirCB,
623                               pCcb,
624                               pDirCB->OpenReferenceCount);
625
626                 //
627                 // If this is not the root then decrement the open child reference count
628                 //
629
630                 if( pObjectInfo->ParentObjectInformation != NULL &&
631                     pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount > 0)
632                 {
633
634                     InterlockedDecrement( &pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
635
636                     AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
637                                   AFS_TRACE_LEVEL_VERBOSE,
638                                   "AFSClose (Share) Decrement child open ref count on Parent object %08lX Cnt %d\n",
639                                   pObjectInfo->ParentObjectInformation,
640                                   pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
641                 }
642
643                 AFSReleaseResource( &pFcb->NPFcb->Resource);
644
645                 ASSERT( pFcb->OpenReferenceCount != 0);
646
647                 InterlockedDecrement( &pFcb->OpenReferenceCount);
648
649                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
650                               AFS_TRACE_LEVEL_VERBOSE,
651                               "AFSClose (Share) Decrement count on Fcb %08lX Cnt %d\n",
652                               pFcb,
653                               pFcb->OpenReferenceCount);
654
655                 break;
656             }
657
658             default:
659
660                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
661                               AFS_TRACE_LEVEL_ERROR,
662                               "AFSClose Processing unknown node type %d\n",
663                               pFcb->Header.NodeTypeCode);
664
665                 break;
666         }
667
668 try_exit:
669
670         //
671         // Complete the request
672         //
673
674         AFSCompleteRequest( Irp,
675                             ntStatus);
676     }
677     __except( AFSExceptionFilter( __FUNCTION__, GetExceptionCode(), GetExceptionInformation()) )
678     {
679
680         AFSDbgLogMsg( 0,
681                       0,
682                       "EXCEPTION - AFSClose\n");
683
684         AFSDumpTraceFilesFnc();
685     }
686
687     return ntStatus;
688 }