src/WINNT/afsrdr/kernel/lib/AFSClose.cpp

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011 Kernel Drivers, LLC.
   3  * Copyright (c) 2009, 2010, 2011 Your File System, Inc.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * - Redistributions of source code must retain the above copyright notice,
  11  *   this list of conditions and the following disclaimer.
  12  * - Redistributions in binary form must reproduce the above copyright
  13  *   notice,
  14  *   this list of conditions and the following disclaimer in the
  15  *   documentation
  16  *   and/or other materials provided with the distribution.
  17  * - Neither the names of Kernel Drivers, LLC and Your File System, Inc.
  18  *   nor the names of their contributors may be used to endorse or promote
  19  *   products derived from this software without specific prior written
  20  *   permission from Kernel Drivers, LLC and Your File System, Inc.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  25  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  26  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  27  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  28  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  29  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  30  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  31  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  32  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  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     UNREFERENCED_PARAMETER(LibDeviceObject);
  58     NTSTATUS ntStatus = STATUS_SUCCESS;
  59     IO_STACK_LOCATION *pIrpSp = IoGetCurrentIrpStackLocation( Irp);
  60     AFSFcb *pFcb = NULL;
  61     AFSDeviceExt *pDeviceExt = NULL;
  62     AFSCcb *pCcb = NULL;
  63     AFSObjectInfoCB *pObjectInfo = NULL;
  64     AFSDirectoryCB *pDirCB = NULL;
  65     LONG lCount;
  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 %p 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                 lCount = InterlockedDecrement( &pDirCB->DirOpenReferenceCount);
 171
 172                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 173                               AFS_TRACE_LEVEL_VERBOSE,
 174                               "AFSClose (IOCtl) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
 175                               &pDirCB->NameInformation.FileName,
 176                               pDirCB,
 177                               pCcb,
 178                               lCount);
 179
 180                 ASSERT( lCount >= 0);
 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 %p Cnt %d\n",
 195                                   pObjectInfo->ParentObjectInformation,
 196                                   pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
 197                 }
 198
 199                 AFSReleaseResource( &pFcb->NPFcb->Resource);
 200
 201                 lCount = InterlockedDecrement( &pFcb->OpenReferenceCount);
 202
 203                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
 204                               AFS_TRACE_LEVEL_VERBOSE,
 205                               "AFSClose (IOCtl) Decrement count on Fcb %p Cnt %d\n",
 206                               pFcb,
 207                               lCount);
 208
 209                 ASSERT( lCount >= 0);
 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 %p 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                 lCount = InterlockedDecrement( &pDirCB->DirOpenReferenceCount);
 252
 253                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 254                               AFS_TRACE_LEVEL_VERBOSE,
 255                               "AFSClose Decrement (Root ALL) count on %wZ DE %p Ccb %p Cnt %d\n",
 256                               &pDirCB->NameInformation.FileName,
 257                               pDirCB,
 258                               pCcb,
 259                               lCount);
 260
 261                 ASSERT( lCount >= 0);
 262
 263                 AFSReleaseResource( &pFcb->NPFcb->Resource);
 264
 265                 lCount = InterlockedDecrement( &pFcb->OpenReferenceCount);
 266
 267                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
 268                               AFS_TRACE_LEVEL_VERBOSE,
 269                               "AFSClose (RootAll) Decrement count on Fcb %p Cnt %d\n",
 270                               pFcb,
 271                               lCount);
 272
 273                 ASSERT( lCount >= 0);
 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 %p 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                 if( pFcb->OpenReferenceCount == 1 &&
 309                     pFcb->Header.NodeTypeCode == AFS_FILE_FCB)
 310                 {
 311
 312                     SetFlag( pFcb->Flags, AFS_FCB_FILE_CLOSED);
 313
 314                     //
 315                     // Attempt to tear down our extent list for the file
 316                     // If there are remaining dirty extents then attempt to
 317                     // flush them as well
 318                     //
 319
 320                     if( pFcb->Specific.File.ExtentsDirtyCount)
 321                     {
 322
 323                         AFSFlushExtents( pFcb,
 324                                          &pCcb->AuthGroup);
 325                     }
 326
 327                     //
 328                     // Wait for any outstanding queued flushes to complete
 329                     //
 330
 331                     AFSWaitOnQueuedFlushes( pFcb);
 332
 333                     ASSERT( pFcb->Specific.File.ExtentsDirtyCount == 0 &&
 334                             pFcb->Specific.File.QueuedFlushCount == 0);
 335
 336                     AFSReleaseResource( &pFcb->NPFcb->Resource);
 337
 338                     //
 339                     // Tear 'em down, we'll not be needing them again
 340                     //
 341
 342                     AFSTearDownFcbExtents( pFcb,
 343                                            &pCcb->AuthGroup);
 344                 }
 345                 else
 346                 {
 347
 348                     if( pFcb->Header.NodeTypeCode == AFS_FILE_FCB &&
 349                         pFcb->Specific.File.ExtentsDirtyCount &&
 350                         (pCcb->GrantedAccess & FILE_WRITE_DATA))
 351                     {
 352
 353                         AFSFlushExtents( pFcb,
 354                                          &pCcb->AuthGroup);
 355                     }
 356
 357                     AFSReleaseResource( &pFcb->NPFcb->Resource);
 358                 }
 359
 360                 pDirCB = pCcb->DirectoryCB;
 361
 362                 //
 363                 // Remove the Ccb and de-allocate it
 364                 //
 365
 366                 ntStatus = AFSRemoveCcb( pFcb,
 367                                          pCcb);
 368
 369                 if( !NT_SUCCESS( ntStatus))
 370                 {
 371
 372                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 373                                   AFS_TRACE_LEVEL_WARNING,
 374                                   "AFSClose Failed to remove Ccb from Fcb Status %08lX\n",
 375                                   ntStatus);
 376
 377                     //
 378                     // We can't actually fail a close operation so reset the status
 379                     //
 380
 381                     ntStatus = STATUS_SUCCESS;
 382                 }
 383
 384                 //
 385                 // If this entry is deleted then remove the object from the volume tree
 386                 //
 387
 388                 if( BooleanFlagOn( pDirCB->Flags, AFS_DIR_ENTRY_DELETED))
 389                 {
 390
 391                     if( pFcb->Header.NodeTypeCode == AFS_FILE_FCB &&
 392                         pObjectInfo->Links == 0)
 393                     {
 394
 395                         //
 396                         // Stop anything possibly in process
 397                         //
 398
 399                         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
 400                                       AFS_TRACE_LEVEL_VERBOSE,
 401                                       "AFSClose Acquiring Fcb extents lock %p EXCL %08lX\n",
 402                                       &pFcb->NPFcb->Specific.File.ExtentsResource,
 403                                       PsGetCurrentThread());
 404
 405                         AFSAcquireExcl( &pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsResource,
 406                                         TRUE);
 407
 408                         pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsRequestStatus = STATUS_FILE_DELETED;
 409
 410                         KeSetEvent( &pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsRequestComplete,
 411                                     0,
 412                                     FALSE);
 413
 414                         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
 415                                       AFS_TRACE_LEVEL_VERBOSE,
 416                                       "AFSClose Releasing Fcb extents lock %p EXCL %08lX\n",
 417                                       &pFcb->NPFcb->Specific.File.ExtentsResource,
 418                                       PsGetCurrentThread());
 419
 420                         AFSReleaseResource( &pObjectInfo->Fcb->NPFcb->Specific.File.ExtentsResource);
 421                     }
 422
 423                     AFSAcquireExcl( pObjectInfo->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
 424                                     TRUE);
 425
 426                     AFSAcquireExcl( pObjectInfo->VolumeCB->ObjectInfoTree.TreeLock,
 427                                     TRUE);
 428
 429                     lCount = InterlockedDecrement( &pDirCB->DirOpenReferenceCount);
 430
 431                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 432                                   AFS_TRACE_LEVEL_VERBOSE,
 433                                   "AFSClose (Other) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
 434                                   &pDirCB->NameInformation.FileName,
 435                                   pDirCB,
 436                                   pCcb,
 437                                   lCount);
 438
 439                     ASSERT( lCount >= 0);
 440
 441                     if( lCount == 0)
 442                     {
 443
 444                         AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
 445                                       AFS_TRACE_LEVEL_VERBOSE,
 446                                       "AFSClose Deleting dir entry %p (%p) for %wZ  FID %08lX-%08lX-%08lX-%08lX\n",
 447                                       pDirCB,
 448                                       pObjectInfo,
 449                                       &pDirCB->NameInformation.FileName,
 450                                       pObjectInfo->FileId.Cell,
 451                                       pObjectInfo->FileId.Volume,
 452                                       pObjectInfo->FileId.Vnode,
 453                                       pObjectInfo->FileId.Unique);
 454
 455                         //
 456                         // Remove and delete the directory entry from the parent list
 457                         //
 458
 459                         AFSDeleteDirEntry( pObjectInfo->ParentObjectInformation,
 460                                            pDirCB);
 461
 462                         AFSAcquireShared( &pObjectInfo->NonPagedInfo->ObjectInfoLock,
 463                                           TRUE);
 464
 465                         if( pObjectInfo->ObjectReferenceCount <= 0)
 466                         {
 467
 468                             if( BooleanFlagOn( pObjectInfo->Flags, AFS_OBJECT_INSERTED_HASH_TREE))
 469                             {
 470
 471                                 AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
 472                                               AFS_TRACE_LEVEL_VERBOSE,
 473                                               "AFSClose Removing object %p from volume tree\n",
 474                                               pObjectInfo);
 475
 476                                 AFSRemoveHashEntry( &pObjectInfo->VolumeCB->ObjectInfoTree.TreeHead,
 477                                                     &pObjectInfo->TreeEntry);
 478
 479                                 ClearFlag( pObjectInfo->Flags, AFS_OBJECT_INSERTED_HASH_TREE);
 480                             }
 481                         }
 482
 483                         AFSReleaseResource( &pObjectInfo->NonPagedInfo->ObjectInfoLock);
 484                     }
 485
 486                     AFSReleaseResource( pObjectInfo->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
 487
 488                     AFSReleaseResource( pObjectInfo->VolumeCB->ObjectInfoTree.TreeLock);
 489                 }
 490                 else
 491                 {
 492
 493                     lCount = InterlockedDecrement( &pDirCB->DirOpenReferenceCount);
 494
 495                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 496                                   AFS_TRACE_LEVEL_VERBOSE,
 497                                   "AFSClose (Other2) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
 498                                   &pDirCB->NameInformation.FileName,
 499                                   pDirCB,
 500                                   pCcb,
 501                                   lCount);
 502
 503                     ASSERT( lCount >= 0);
 504                 }
 505
 506                 //
 507                 // If this is not the root then decrement the open child reference count
 508                 //
 509
 510                 if( pObjectInfo != NULL &&
 511                     pObjectInfo->ParentObjectInformation != NULL &&
 512                     pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount > 0)
 513                 {
 514
 515                     InterlockedDecrement( &pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
 516
 517                     AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
 518                                   AFS_TRACE_LEVEL_VERBOSE,
 519                                   "AFSClose Decrement child open ref count on Parent object %p Cnt %d\n",
 520                                   pObjectInfo->ParentObjectInformation,
 521                                   pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
 522                 }
 523
 524                 //
 525                 // Decrement the reference count on the Fcb. this is protecting it from teardown.
 526                 //
 527
 528                 lCount = InterlockedDecrement( &pFcb->OpenReferenceCount);
 529
 530                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
 531                               AFS_TRACE_LEVEL_VERBOSE,
 532                               "AFSClose Decrement count on Fcb %p Cnt %d\n",
 533                               pFcb,
 534                               lCount);
 535
 536                 ASSERT( lCount >= 0);
 537
 538                 break;
 539             }
 540
 541             case AFS_SPECIAL_SHARE_FCB:
 542             {
 543
 544                 AFSPipeOpenCloseRequestCB stPipeClose;
 545
 546                 pCcb = (AFSCcb *)pIrpSp->FileObject->FsContext2;
 547
 548                 AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
 549                               AFS_TRACE_LEVEL_VERBOSE,
 550                               "AFSClose Acquiring Special Share lock %p EXCL %08lX\n",
 551                               &pFcb->NPFcb->Resource,
 552                               PsGetCurrentThread());
 553
 554                 AFSAcquireExcl( &pFcb->NPFcb->Resource,
 555                                 TRUE);
 556
 557                 RtlZeroMemory( &stPipeClose,
 558                                sizeof( AFSPipeOpenCloseRequestCB));
 559
 560                 stPipeClose.RequestId = pCcb->RequestID;
 561
 562                 stPipeClose.RootId = pObjectInfo->VolumeCB->ObjectInformation.FileId;
 563
 564                 //
 565                 // Issue the open request to the service
 566                 //
 567
 568                 /*
 569                 AFSProcessRequest( AFS_REQUEST_TYPE_PIPE_CLOSE,
 570                                    AFS_REQUEST_FLAG_SYNCHRONOUS,
 571                                    &pFcb->AuthGroup,
 572                                    &pDirCB->NameInformation.FileName,
 573                                    NULL,
 574                                    (void *)&stPipeClose,
 575                                    sizeof( AFSPipeOpenCloseRequestCB),
 576                                    NULL,
 577                                    NULL);
 578                 */
 579
 580                 pDirCB = pCcb->DirectoryCB;
 581
 582                 //
 583                 // Remove the Ccb and de-allocate it
 584                 //
 585
 586                 ntStatus = AFSRemoveCcb( pFcb,
 587                                          pCcb);
 588
 589                 if( !NT_SUCCESS( ntStatus))
 590                 {
 591
 592                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 593                                   AFS_TRACE_LEVEL_WARNING,
 594                                   "AFSClose Failed to remove Ccb from Fcb Status %08lX\n", ntStatus);
 595
 596                     //
 597                     // We can't actually fail a close operation so reset the status
 598                     //
 599
 600                     ntStatus = STATUS_SUCCESS;
 601                 }
 602
 603                 lCount = InterlockedDecrement( &pDirCB->DirOpenReferenceCount);
 604
 605                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 606                               AFS_TRACE_LEVEL_VERBOSE,
 607                               "AFSClose (Share) Decrement count on %wZ DE %p Ccb %p Cnt %d\n",
 608                               &pDirCB->NameInformation.FileName,
 609                               pDirCB,
 610                               pCcb,
 611                               lCount);
 612
 613                 ASSERT( lCount >= 0);
 614
 615                 //
 616                 // If this is not the root then decrement the open child reference count
 617                 //
 618
 619                 if( pObjectInfo->ParentObjectInformation != NULL &&
 620                     pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount > 0)
 621                 {
 622
 623                     lCount = InterlockedDecrement( &pObjectInfo->ParentObjectInformation->Specific.Directory.ChildOpenReferenceCount);
 624
 625                     AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
 626                                   AFS_TRACE_LEVEL_VERBOSE,
 627                                   "AFSClose (Share) Decrement child open ref count on Parent object %p Cnt %d\n",
 628                                   pObjectInfo->ParentObjectInformation,
 629                                   lCount);
 630                 }
 631
 632                 AFSReleaseResource( &pFcb->NPFcb->Resource);
 633
 634                 lCount = InterlockedDecrement( &pFcb->OpenReferenceCount);
 635
 636                 AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
 637                               AFS_TRACE_LEVEL_VERBOSE,
 638                               "AFSClose (Share) Decrement count on Fcb %p Cnt %d\n",
 639                               pFcb,
 640                               lCount);
 641
 642                 ASSERT( lCount >= 0);
 643
 644                 break;
 645             }
 646
 647             default:
 648
 649                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 650                               AFS_TRACE_LEVEL_ERROR,
 651                               "AFSClose Processing unknown node type %d\n",
 652                               pFcb->Header.NodeTypeCode);
 653
 654                 break;
 655         }
 656
 657 try_exit:
 658
 659         //
 660         // Complete the request
 661         //
 662
 663         AFSCompleteRequest( Irp,
 664                             ntStatus);
 665     }
 666     __except( AFSExceptionFilter( __FUNCTION__, GetExceptionCode(), GetExceptionInformation()) )
 667     {
 668
 669         AFSDbgLogMsg( 0,
 670                       0,
 671                       "EXCEPTION - AFSClose\n");
 672
 673         AFSDumpTraceFilesFnc();
 674     }
 675
 676     return ntStatus;
 677 }