src/WINNT/afsrdr/kernel/lib/AFSWorker.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  *
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   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
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  11  *   this list of conditions and the following disclaimer.
  12  * - Redistributions in binary form must reproduce the above copyright
  13  *   notice,
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  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.
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  32  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 //
  36 // File: AFSWorker.cpp
  37 //
  38
  39 #include "AFSCommon.h"
  40
  41 //
  42 // Function: AFSInitializeWorkerPool
  43 //
  44 // Description:
  45 //
  46 //      This function initializes the worker thread pool
  47 //
  48 // Return:
  49 //
  50 //      A status is returned for the function
  51 //
  52
  53 NTSTATUS
  54 AFSInitializeWorkerPool()
  55 {
  56
  57     NTSTATUS ntStatus = STATUS_SUCCESS;
  58     AFSWorkQueueContext        *pCurrentWorker = NULL, *pLastWorker = NULL;
  59     AFSDeviceExt *pDevExt = NULL;
  60
  61     __Enter
  62     {
  63
  64         pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
  65
  66         //
  67         // Initialize the worker threads.
  68         //
  69
  70         pDevExt->Specific.Library.WorkerCount = 0;
  71
  72         KeInitializeEvent( &pDevExt->Specific.Library.WorkerQueueHasItems,
  73                            SynchronizationEvent,
  74                            FALSE);
  75
  76         //
  77         // Initialize the queue resource
  78         //
  79
  80         ExInitializeResourceLite( &pDevExt->Specific.Library.QueueLock);
  81
  82         while( pDevExt->Specific.Library.WorkerCount < AFS_WORKER_COUNT)
  83         {
  84
  85             pCurrentWorker = (AFSWorkQueueContext *)AFSLibExAllocatePoolWithTag( NonPagedPool,
  86                                                                                  sizeof( AFSWorkQueueContext),
  87                                                                                  AFS_WORKER_CB_TAG);
  88
  89             if( pCurrentWorker == NULL)
  90             {
  91
  92                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
  93                               AFS_TRACE_LEVEL_ERROR,
  94                               "AFSInitializeWorkerPool Failed to allocate worker context\n");
  95
  96                 ntStatus = STATUS_INSUFFICIENT_RESOURCES;
  97
  98                 break;
  99             }
 100
 101             RtlZeroMemory( pCurrentWorker,
 102                            sizeof( AFSWorkQueueContext));
 103
 104             ntStatus = AFSInitWorkerThread( pCurrentWorker,
 105                                             (PKSTART_ROUTINE)AFSWorkerThread);
 106
 107             if( !NT_SUCCESS( ntStatus))
 108             {
 109
 110                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 111                               AFS_TRACE_LEVEL_ERROR,
 112                               "AFSInitializeWorkerPool Failed to initialize worker thread Status %08lX\n", ntStatus);
 113
 114                 ExFreePool( pCurrentWorker);
 115
 116                 break;
 117             }
 118
 119             if( pDevExt->Specific.Library.PoolHead == NULL)
 120             {
 121
 122                 pDevExt->Specific.Library.PoolHead = pCurrentWorker;
 123             }
 124             else
 125             {
 126
 127                 pLastWorker->fLink = pCurrentWorker;
 128             }
 129
 130             pLastWorker = pCurrentWorker;
 131
 132             pDevExt->Specific.Library.WorkerCount++;
 133         }
 134
 135         //
 136         // If there was a failure but there is at least one worker, then go with it.
 137         //
 138
 139         if( !NT_SUCCESS( ntStatus) &&
 140             pDevExt->Specific.Library.WorkerCount == 0)
 141         {
 142
 143             try_return( ntStatus);
 144         }
 145
 146         ntStatus = STATUS_SUCCESS;
 147
 148         //
 149         // Now our IO Worker queue
 150         //
 151
 152         pDevExt->Specific.Library.IOWorkerCount = 0;
 153
 154         KeInitializeEvent( &pDevExt->Specific.Library.IOWorkerQueueHasItems,
 155                            SynchronizationEvent,
 156                            FALSE);
 157
 158         //
 159         // Initialize the queue resource
 160         //
 161
 162         ExInitializeResourceLite( &pDevExt->Specific.Library.IOQueueLock);
 163
 164         while( pDevExt->Specific.Library.IOWorkerCount < AFS_IO_WORKER_COUNT)
 165         {
 166
 167             pCurrentWorker = (AFSWorkQueueContext *)AFSLibExAllocatePoolWithTag( NonPagedPool,
 168                                                                                  sizeof( AFSWorkQueueContext),
 169                                                                                  AFS_WORKER_CB_TAG);
 170
 171             if( pCurrentWorker == NULL)
 172             {
 173
 174                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 175                               AFS_TRACE_LEVEL_ERROR,
 176                               "AFSInitializeWorkerPool Failed to allocate IO worker context\n");
 177
 178                 ntStatus = STATUS_INSUFFICIENT_RESOURCES;
 179
 180                 break;
 181             }
 182
 183             RtlZeroMemory( pCurrentWorker,
 184                            sizeof( AFSWorkQueueContext));
 185
 186             ntStatus = AFSInitWorkerThread( pCurrentWorker,
 187                                             (PKSTART_ROUTINE)AFSIOWorkerThread);
 188
 189             if( !NT_SUCCESS( ntStatus))
 190             {
 191
 192                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 193                               AFS_TRACE_LEVEL_ERROR,
 194                               "AFSInitializeWorkerPool Failed to initialize IO worker thread Status %08lX\n", ntStatus);
 195
 196                 ExFreePool( pCurrentWorker);
 197
 198                 break;
 199             }
 200
 201             if( pDevExt->Specific.Library.IOPoolHead == NULL)
 202             {
 203
 204                 pDevExt->Specific.Library.IOPoolHead = pCurrentWorker;
 205             }
 206             else
 207             {
 208
 209                 pLastWorker->fLink = pCurrentWorker;
 210             }
 211
 212             pLastWorker = pCurrentWorker;
 213
 214             pDevExt->Specific.Library.IOWorkerCount++;
 215         }
 216
 217         //
 218         // If there was a failure but there is at least one worker, then go with it.
 219         //
 220
 221         if( !NT_SUCCESS( ntStatus) &&
 222             pDevExt->Specific.Library.IOWorkerCount == 0)
 223         {
 224
 225             try_return( ntStatus);
 226         }
 227
 228 try_exit:
 229
 230         if( !NT_SUCCESS( ntStatus))
 231         {
 232
 233             //
 234             // Failed to initialize the pool so tear it down
 235             //
 236
 237             AFSRemoveWorkerPool();
 238         }
 239     }
 240
 241     return ntStatus;
 242 }
 243
 244 //
 245 // Function: AFSRemoveWorkerPool
 246 //
 247 // Description:
 248 //
 249 //      This function tears down the worker thread pool
 250 //
 251 // Return:
 252 //
 253 //      A status is returned for the function
 254 //
 255
 256 NTSTATUS
 257 AFSRemoveWorkerPool()
 258 {
 259
 260     NTSTATUS ntStatus = STATUS_SUCCESS;
 261     ULONG index = 0;
 262     AFSWorkQueueContext        *pCurrentWorker = NULL, *pNextWorker = NULL;
 263     AFSDeviceExt *pDevExt = NULL;
 264
 265     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
 266
 267     //
 268     // Loop through the workers shutting them down in two stages.
 269     // First, clear AFS_WORKER_PROCESS_REQUESTS so that workers
 270     // stop processing requests.  Second, call AFSShutdownWorkerThread()
 271     // to wake the workers and wait for them to exit.
 272     //
 273
 274     pCurrentWorker = pDevExt->Specific.Library.PoolHead;
 275
 276     while( index < pDevExt->Specific.Library.WorkerCount)
 277     {
 278
 279         ClearFlag( pCurrentWorker->State, AFS_WORKER_PROCESS_REQUESTS);
 280
 281         pCurrentWorker = pCurrentWorker->fLink;
 282
 283         if ( pCurrentWorker == NULL)
 284         {
 285
 286             break;
 287         }
 288
 289         index++;
 290     }
 291
 292     pCurrentWorker = pDevExt->Specific.Library.PoolHead;
 293
 294     index = 0;
 295
 296     while( index < pDevExt->Specific.Library.WorkerCount)
 297     {
 298
 299         ntStatus = AFSShutdownWorkerThread( pCurrentWorker);
 300
 301         pNextWorker = pCurrentWorker->fLink;
 302
 303         ExFreePool( pCurrentWorker);
 304
 305         pCurrentWorker = pNextWorker;
 306
 307         if( pCurrentWorker == NULL)
 308         {
 309
 310             break;
 311         }
 312
 313         index++;
 314     }
 315
 316     pDevExt->Specific.Library.PoolHead = NULL;
 317
 318     ExDeleteResourceLite( &pDevExt->Specific.Library.QueueLock);
 319
 320     //
 321     // Loop through the IO workers shutting them down in two stages.
 322     // First, clear AFS_WORKER_PROCESS_REQUESTS so that workers
 323     // stop processing requests.  Second, call AFSShutdownWorkerThread()
 324     // to wake the workers and wait for them to exit.
 325     //
 326
 327     pCurrentWorker = pDevExt->Specific.Library.IOPoolHead;
 328
 329     index = 0;
 330
 331     while( index < pDevExt->Specific.Library.IOWorkerCount)
 332     {
 333
 334         ClearFlag( pCurrentWorker->State, AFS_WORKER_PROCESS_REQUESTS);
 335
 336         pCurrentWorker = pCurrentWorker->fLink;
 337
 338         if ( pCurrentWorker == NULL)
 339         {
 340
 341             break;
 342         }
 343
 344         index++;
 345     }
 346
 347     pCurrentWorker = pDevExt->Specific.Library.IOPoolHead;
 348
 349     index = 0;
 350
 351     while( index < pDevExt->Specific.Library.IOWorkerCount)
 352     {
 353
 354         ntStatus = AFSShutdownIOWorkerThread( pCurrentWorker);
 355
 356         pNextWorker = pCurrentWorker->fLink;
 357
 358         ExFreePool( pCurrentWorker);
 359
 360         pCurrentWorker = pNextWorker;
 361
 362         if( pCurrentWorker == NULL)
 363         {
 364
 365             break;
 366         }
 367
 368         index++;
 369     }
 370
 371     pDevExt->Specific.Library.IOPoolHead = NULL;
 372
 373     ExDeleteResourceLite( &pDevExt->Specific.Library.IOQueueLock);
 374
 375     return ntStatus;
 376 }
 377
 378 NTSTATUS
 379 AFSInitVolumeWorker( IN AFSVolumeCB *VolumeCB)
 380 {
 381
 382     NTSTATUS ntStatus = STATUS_SUCCESS;
 383     AFSWorkQueueContext *pWorker = &VolumeCB->VolumeWorkerContext;
 384     HANDLE hThread;
 385     AFSDeviceExt *pControlDeviceExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
 386     PKSTART_ROUTINE pStartRoutine = NULL;
 387     LONG lCount;
 388
 389     __Enter
 390     {
 391
 392         if( VolumeCB == AFSGlobalRoot)
 393         {
 394
 395             pStartRoutine = AFSPrimaryVolumeWorkerThread;
 396         }
 397         else
 398         {
 399
 400             pStartRoutine = AFSVolumeWorkerThread;
 401         }
 402
 403         //
 404         // Initialize the worker thread
 405         //
 406
 407         KeInitializeEvent( &pWorker->WorkerThreadReady,
 408                            NotificationEvent,
 409                            FALSE);
 410
 411         //
 412         // Set the worker to process requests
 413         //
 414
 415         pWorker->State = AFS_WORKER_PROCESS_REQUESTS;
 416
 417         //
 418         // Launch the thread
 419         //
 420
 421         ntStatus =  PsCreateSystemThread( &hThread,
 422                                           0,
 423                                           NULL,
 424                                           NULL,
 425                                           NULL,
 426                                           pStartRoutine,
 427                                           (void *)VolumeCB);
 428
 429         if( NT_SUCCESS( ntStatus))
 430         {
 431
 432             ObReferenceObjectByHandle( hThread,
 433                                        GENERIC_READ | GENERIC_WRITE,
 434                                        NULL,
 435                                        KernelMode,
 436                                        (PVOID *)&pWorker->WorkerThreadObject,
 437                                        NULL);
 438
 439             ntStatus = KeWaitForSingleObject( &pWorker->WorkerThreadReady,
 440                                               Executive,
 441                                               KernelMode,
 442                                               FALSE,
 443                                               NULL);
 444
 445             lCount = InterlockedIncrement( &pControlDeviceExt->Specific.Control.VolumeWorkerThreadCount);
 446
 447             if( lCount > 0)
 448             {
 449
 450                 KeClearEvent( &pControlDeviceExt->Specific.Control.VolumeWorkerCloseEvent);
 451             }
 452
 453             ZwClose( hThread);
 454         }
 455     }
 456
 457     return ntStatus;
 458 }
 459
 460 //
 461 // Function: AFSInitWorkerThread
 462 //
 463 // Description:
 464 //
 465 //      This function initializes a worker thread in the pool
 466 //
 467 // Return:
 468 //
 469 //      A status is returned for the function
 470 //
 471
 472 NTSTATUS
 473 AFSInitWorkerThread( IN AFSWorkQueueContext *PoolContext,
 474                      IN PKSTART_ROUTINE WorkerRoutine)
 475 {
 476
 477     NTSTATUS ntStatus = STATUS_SUCCESS;
 478     HANDLE Handle;
 479
 480     //
 481     // INitialize the worker signal thread
 482     //
 483
 484     KeInitializeEvent( &PoolContext->WorkerThreadReady,
 485                        NotificationEvent,
 486                        FALSE);
 487
 488     //
 489     // Set the worker to process requests
 490     //
 491
 492     PoolContext->State = AFS_WORKER_PROCESS_REQUESTS;
 493
 494     //
 495     // Launch the thread
 496     //
 497
 498     ntStatus =  PsCreateSystemThread( &Handle,
 499                                       0,
 500                                       NULL,
 501                                       NULL,
 502                                       NULL,
 503                                       WorkerRoutine,
 504                                       (void *)PoolContext);
 505
 506     if( NT_SUCCESS( ntStatus))
 507     {
 508
 509         ObReferenceObjectByHandle( Handle,
 510                                    GENERIC_READ | GENERIC_WRITE,
 511                                    NULL,
 512                                    KernelMode,
 513                                    (PVOID *)&PoolContext->WorkerThreadObject,
 514                                    NULL);
 515
 516         ntStatus = KeWaitForSingleObject( &PoolContext->WorkerThreadReady,
 517                                           Executive,
 518                                           KernelMode,
 519                                           FALSE,
 520                                           NULL);
 521
 522         ZwClose( Handle);
 523     }
 524
 525     return ntStatus;
 526 }
 527
 528 NTSTATUS
 529 AFSShutdownVolumeWorker( IN AFSVolumeCB *VolumeCB)
 530 {
 531
 532     NTSTATUS ntStatus = STATUS_SUCCESS;
 533     AFSWorkQueueContext *pWorker = &VolumeCB->VolumeWorkerContext;
 534
 535     if( pWorker->WorkerThreadObject != NULL &&
 536         BooleanFlagOn( pWorker->State, AFS_WORKER_INITIALIZED))
 537     {
 538
 539         //
 540         // Clear the 'keep processing' flag
 541         //
 542
 543         ClearFlag( pWorker->State, AFS_WORKER_PROCESS_REQUESTS);
 544
 545         ntStatus = KeWaitForSingleObject( pWorker->WorkerThreadObject,
 546                                           Executive,
 547                                           KernelMode,
 548                                           FALSE,
 549                                           NULL);
 550
 551         ObDereferenceObject( pWorker->WorkerThreadObject);
 552
 553         pWorker->WorkerThreadObject = NULL;
 554     }
 555
 556     return ntStatus;
 557 }
 558
 559 //
 560 // Function: AFSShutdownWorkerThread
 561 //
 562 // Description:
 563 //
 564 //      This function shutsdown a worker thread in the pool
 565 //
 566 // Return:
 567 //
 568 //      A status is returned for the function
 569 //
 570
 571 NTSTATUS
 572 AFSShutdownWorkerThread( IN AFSWorkQueueContext *PoolContext)
 573 {
 574
 575     NTSTATUS ntStatus = STATUS_SUCCESS;
 576     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
 577
 578     if( PoolContext->WorkerThreadObject != NULL &&
 579         BooleanFlagOn( PoolContext->State, AFS_WORKER_INITIALIZED))
 580     {
 581
 582         //
 583         // Wake up the thread if it is a sleep
 584         //
 585
 586         KeSetEvent( &pDeviceExt->Specific.Library.WorkerQueueHasItems,
 587                     0,
 588                     FALSE);
 589
 590         ntStatus = KeWaitForSingleObject( PoolContext->WorkerThreadObject,
 591                                           Executive,
 592                                           KernelMode,
 593                                           FALSE,
 594                                           NULL);
 595
 596         ObDereferenceObject( PoolContext->WorkerThreadObject);
 597
 598         PoolContext->WorkerThreadObject = NULL;
 599     }
 600
 601     return ntStatus;
 602 }
 603
 604 //
 605 // Function: AFSShutdownIOWorkerThread
 606 //
 607 // Description:
 608 //
 609 //      This function shutsdown an IO worker thread in the pool
 610 //
 611 // Return:
 612 //
 613 //      A status is returned for the function
 614 //
 615
 616 NTSTATUS
 617 AFSShutdownIOWorkerThread( IN AFSWorkQueueContext *PoolContext)
 618 {
 619
 620     NTSTATUS ntStatus = STATUS_SUCCESS;
 621     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
 622
 623     if( PoolContext->WorkerThreadObject != NULL &&
 624         BooleanFlagOn( PoolContext->State, AFS_WORKER_INITIALIZED))
 625     {
 626
 627         //
 628         // Wake up the thread if it is a sleep
 629         //
 630
 631         KeSetEvent( &pDeviceExt->Specific.Library.IOWorkerQueueHasItems,
 632                     0,
 633                     FALSE);
 634
 635         ntStatus = KeWaitForSingleObject( PoolContext->WorkerThreadObject,
 636                                           Executive,
 637                                           KernelMode,
 638                                           FALSE,
 639                                           NULL);
 640
 641         ObDereferenceObject( PoolContext->WorkerThreadObject);
 642
 643         PoolContext->WorkerThreadObject = NULL;
 644     }
 645
 646     return ntStatus;
 647 }
 648
 649 //
 650 // Function: AFSWorkerThread
 651 //
 652 // Description:
 653 //
 654 //      This is the worker thread entry point.
 655 //
 656 // Return:
 657 //
 658 //      A status is returned for the function
 659 //
 660
 661 void
 662 AFSWorkerThread( IN PVOID Context)
 663 {
 664
 665     NTSTATUS ntStatus = STATUS_SUCCESS;
 666     AFSWorkQueueContext *pPoolContext = (AFSWorkQueueContext *)Context;
 667     AFSWorkItem *pWorkItem;
 668     BOOLEAN freeWorkItem = TRUE;
 669     AFSDeviceExt *pLibraryDevExt = NULL;
 670     LONG lCount;
 671
 672     pLibraryDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
 673
 674     //
 675     // Indicate that we are initialized and ready
 676     //
 677
 678     KeSetEvent( &pPoolContext->WorkerThreadReady,
 679                 0,
 680                 FALSE);
 681
 682     //
 683     // Indicate we are initialized
 684     //
 685
 686     SetFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
 687
 688     ntStatus = KeWaitForSingleObject( &pLibraryDevExt->Specific.Library.WorkerQueueHasItems,
 689                                       Executive,
 690                                       KernelMode,
 691                                       FALSE,
 692                                       NULL);
 693
 694     while( BooleanFlagOn( pPoolContext->State, AFS_WORKER_PROCESS_REQUESTS))
 695     {
 696
 697         if( !NT_SUCCESS( ntStatus))
 698         {
 699
 700             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 701                           AFS_TRACE_LEVEL_ERROR,
 702                           "AFSWorkerThread Wait for queue items failed Status %08lX\n", ntStatus);
 703
 704             ntStatus = STATUS_SUCCESS;
 705         }
 706         else
 707         {
 708
 709             pWorkItem = AFSRemoveWorkItem();
 710
 711             if( pWorkItem == NULL)
 712             {
 713
 714                 ntStatus = KeWaitForSingleObject( &pLibraryDevExt->Specific.Library.WorkerQueueHasItems,
 715                                                   Executive,
 716                                                   KernelMode,
 717                                                   FALSE,
 718                                                   NULL);
 719             }
 720             else
 721             {
 722
 723                 freeWorkItem = TRUE;
 724
 725                 //
 726                 // Switch on the type of work item to process
 727                 //
 728
 729                 switch( pWorkItem->RequestType)
 730                 {
 731
 732                     case AFS_WORK_FLUSH_FCB:
 733                     {
 734
 735                         ntStatus = AFSFlushExtents( pWorkItem->Specific.Fcb.Fcb,
 736                                                     &pWorkItem->AuthGroup);
 737
 738                         if( !NT_SUCCESS( ntStatus))
 739                         {
 740
 741                             AFSReleaseExtentsWithFlush( pWorkItem->Specific.Fcb.Fcb,
 742                                                         &pWorkItem->AuthGroup);
 743                         }
 744
 745                         ASSERT( pWorkItem->Specific.Fcb.Fcb->OpenReferenceCount != 0);
 746
 747                         lCount = InterlockedDecrement( &pWorkItem->Specific.Fcb.Fcb->OpenReferenceCount);
 748
 749                         break;
 750                     }
 751
 752                     case AFS_WORK_ASYNCH_READ:
 753                     {
 754
 755                         ASSERT( pWorkItem->Specific.AsynchIo.CallingProcess != NULL);
 756
 757                         (VOID) AFSCommonRead( pWorkItem->Specific.AsynchIo.Device,
 758                                               pWorkItem->Specific.AsynchIo.Irp,
 759                                               pWorkItem->Specific.AsynchIo.CallingProcess);
 760
 761                         break;
 762                     }
 763
 764                     case AFS_WORK_ASYNCH_WRITE:
 765                     {
 766
 767                         ASSERT( pWorkItem->Specific.AsynchIo.CallingProcess != NULL);
 768
 769                         (VOID) AFSCommonWrite( pWorkItem->Specific.AsynchIo.Device,
 770                                                pWorkItem->Specific.AsynchIo.Irp,
 771                                                pWorkItem->Specific.AsynchIo.CallingProcess);
 772                         break;
 773                     }
 774
 775                     case AFS_WORK_ENUMERATE_GLOBAL_ROOT:
 776                     {
 777
 778                         AFSEnumerateGlobalRoot( NULL);
 779
 780                         break;
 781                     }
 782
 783                     case AFS_WORK_INVALIDATE_OBJECT:
 784                     {
 785
 786                         AFSPerformObjectInvalidate( pWorkItem->Specific.Invalidate.ObjectInfo,
 787                                                     pWorkItem->Specific.Invalidate.InvalidateReason);
 788
 789                         freeWorkItem = TRUE;
 790
 791                         break;
 792                     }
 793
 794                     case AFS_WORK_START_IOS:
 795                     {
 796
 797                         freeWorkItem = TRUE;
 798
 799                         break;
 800                     }
 801
 802                     default:
 803
 804                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 805                                       AFS_TRACE_LEVEL_ERROR,
 806                                       "AFSWorkerThread Unknown request type %d\n", pWorkItem->RequestType);
 807
 808                         break;
 809                 }
 810
 811                 if( freeWorkItem)
 812                 {
 813
 814                     ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
 815                 }
 816
 817                 ntStatus = STATUS_SUCCESS;
 818             }
 819         }
 820     } // worker thread loop
 821
 822     ClearFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
 823
 824     // Wake up another worker so they too can exit
 825
 826     KeSetEvent( &pLibraryDevExt->Specific.Library.WorkerQueueHasItems,
 827                 0,
 828                 FALSE);
 829
 830     PsTerminateSystemThread( 0);
 831
 832     return;
 833 }
 834
 835 void
 836 AFSIOWorkerThread( IN PVOID Context)
 837 {
 838
 839     NTSTATUS ntStatus = STATUS_SUCCESS;
 840     AFSWorkQueueContext *pPoolContext = (AFSWorkQueueContext *)Context;
 841     AFSWorkItem *pWorkItem;
 842     BOOLEAN freeWorkItem = TRUE;
 843     AFSDeviceExt *pLibraryDevExt = NULL, *pRdrDevExt = NULL;
 844
 845     pLibraryDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
 846
 847     //
 848     // Indicate that we are initialized and ready
 849     //
 850
 851     KeSetEvent( &pPoolContext->WorkerThreadReady,
 852                 0,
 853                 FALSE);
 854
 855
 856     //
 857     // Indicate we are initialized
 858     //
 859
 860     SetFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
 861
 862     ntStatus = KeWaitForSingleObject( &pLibraryDevExt->Specific.Library.IOWorkerQueueHasItems,
 863                                       Executive,
 864                                       KernelMode,
 865                                       FALSE,
 866                                       NULL);
 867
 868     while( BooleanFlagOn( pPoolContext->State, AFS_WORKER_PROCESS_REQUESTS))
 869     {
 870
 871         if( !NT_SUCCESS( ntStatus))
 872         {
 873
 874             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 875                           AFS_TRACE_LEVEL_ERROR,
 876                           "AFSIOWorkerThread Wait for queue items failed Status %08lX\n", ntStatus);
 877
 878             ntStatus = STATUS_SUCCESS;
 879         }
 880         else
 881         {
 882
 883             pWorkItem = AFSRemoveIOWorkItem();
 884
 885             if( pWorkItem == NULL)
 886             {
 887
 888                 ntStatus = KeWaitForSingleObject( &pLibraryDevExt->Specific.Library.IOWorkerQueueHasItems,
 889                                                   Executive,
 890                                                   KernelMode,
 891                                                   FALSE,
 892                                                   NULL);
 893             }
 894             else
 895             {
 896
 897                 freeWorkItem = TRUE;
 898
 899                 //
 900                 // Switch on the type of work item to process
 901                 //
 902
 903                 switch( pWorkItem->RequestType)
 904                 {
 905
 906                     case AFS_WORK_START_IOS:
 907                     {
 908
 909                         pRdrDevExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
 910
 911                         //
 912                         // The final status is in the gather io
 913                         //
 914
 915                         ntStatus = AFSStartIos( pWorkItem->Specific.CacheAccess.CacheFileObject,
 916                                                 pWorkItem->Specific.CacheAccess.FunctionCode,
 917                                                 pWorkItem->Specific.CacheAccess.RequestFlags,
 918                                                 pWorkItem->Specific.CacheAccess.IoRuns,
 919                                                 pWorkItem->Specific.CacheAccess.RunCount,
 920                                                 pWorkItem->Specific.CacheAccess.GatherIo);
 921
 922                         //
 923                         // Regardless of the status we we do the complete - there may
 924                         // be IOs in flight
 925                         // Decrement the count - setting the event if we were told
 926                         // to. This may trigger completion.
 927                         //
 928
 929                         AFSCompleteIo( pWorkItem->Specific.CacheAccess.GatherIo, ntStatus );
 930
 931                         freeWorkItem = TRUE;
 932
 933                         break;
 934                     }
 935
 936                     default:
 937
 938                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 939                                       AFS_TRACE_LEVEL_ERROR,
 940                                       "AFSWorkerThread Unknown request type %d\n", pWorkItem->RequestType);
 941
 942                         break;
 943                 }
 944
 945                 if( freeWorkItem)
 946                 {
 947
 948                     ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
 949                 }
 950
 951                 ntStatus = STATUS_SUCCESS;
 952             }
 953         }
 954     } // worker thread loop
 955
 956     ClearFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
 957
 958     // Wake up another IOWorker so they too can exit
 959
 960     KeSetEvent( &pLibraryDevExt->Specific.Library.IOWorkerQueueHasItems,
 961                 0,
 962                 FALSE);
 963
 964     PsTerminateSystemThread( 0);
 965
 966     return;
 967 }
 968
 969 void
 970 AFSPrimaryVolumeWorkerThread( IN PVOID Context)
 971 {
 972
 973     NTSTATUS ntStatus = STATUS_SUCCESS;
 974     AFSWorkQueueContext *pPoolContext = (AFSWorkQueueContext *)&AFSGlobalRoot->VolumeWorkerContext;
 975     AFSDeviceExt *pControlDeviceExt = NULL;
 976     AFSDeviceExt *pRDRDeviceExt = NULL;
 977     LARGE_INTEGER DueTime;
 978     LONG TimeOut;
 979     KTIMER Timer;
 980     BOOLEAN bFoundOpenEntry = FALSE;
 981     AFSObjectInfoCB *pCurrentObject = NULL, *pNextObject = NULL, *pCurrentChildObject = NULL;
 982     AFSDirectoryCB *pCurrentDirEntry = NULL, *pNextDirEntry = NULL;
 983     BOOLEAN bReleaseVolumeLock = FALSE;
 984     AFSVolumeCB *pVolumeCB = NULL, *pNextVolume = NULL;
 985     LARGE_INTEGER liCurrentTime;
 986     BOOLEAN bVolumeObject = FALSE;
 987     LONG lCount;
 988
 989     pControlDeviceExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
 990
 991     pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
 992
 993     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
 994                   AFS_TRACE_LEVEL_VERBOSE,
 995                   "AFSPrimaryVolumeWorkerThread Initialized\n");
 996
 997     //
 998     // Initialize the timer for the worker thread
 999     //
1000
1001     DueTime.QuadPart = -(5000);
1002
1003     TimeOut = 5000;
1004
1005     KeInitializeTimerEx( &Timer,
1006                          SynchronizationTimer);
1007
1008     KeSetTimerEx( &Timer,
1009                   DueTime,
1010                   TimeOut,
1011                   NULL);
1012
1013     //
1014     // Indicate that we are initialized and ready
1015     //
1016
1017     KeSetEvent( &pPoolContext->WorkerThreadReady,
1018                 0,
1019                 FALSE);
1020
1021     //
1022     // Indicate we are initialized
1023     //
1024
1025     SetFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
1026
1027     while( BooleanFlagOn( pPoolContext->State, AFS_WORKER_PROCESS_REQUESTS))
1028     {
1029
1030         KeWaitForSingleObject( &Timer,
1031                                Executive,
1032                                KernelMode,
1033                                FALSE,
1034                                NULL);
1035
1036         //
1037         // This is the primary volume worker so it will traverse the volume list
1038         // looking for cleanup or volumes requiring private workers
1039         //
1040
1041         AFSAcquireShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
1042                           TRUE);
1043
1044         pVolumeCB = pRDRDeviceExt->Specific.RDR.VolumeListHead;
1045
1046         while( pVolumeCB != NULL)
1047         {
1048
1049             if( pVolumeCB == AFSGlobalRoot ||
1050                 !AFSAcquireExcl( pVolumeCB->VolumeLock,
1051                                  FALSE))
1052             {
1053
1054                 pVolumeCB = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1055
1056                 continue;
1057             }
1058
1059             if( pVolumeCB->ObjectInfoListHead == NULL)
1060             {
1061
1062                 AFSReleaseResource( pVolumeCB->VolumeLock);
1063
1064                 AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1065
1066                 AFSAcquireExcl( pRDRDeviceExt->Specific.RDR.VolumeTree.TreeLock,
1067                                 TRUE);
1068
1069                 AFSAcquireExcl( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
1070                                 TRUE);
1071
1072                 if( !AFSAcquireExcl( pVolumeCB->VolumeLock,
1073                                      FALSE))
1074                 {
1075
1076                     AFSConvertToShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1077
1078                     AFSReleaseResource( pRDRDeviceExt->Specific.RDR.VolumeTree.TreeLock);
1079
1080                     pVolumeCB = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1081
1082                     continue;
1083                 }
1084
1085                 KeQueryTickCount( &liCurrentTime);
1086
1087                 pNextVolume = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1088
1089                 if( pVolumeCB->ObjectInfoListHead == NULL &&
1090                     pVolumeCB->DirectoryCB->OpenReferenceCount == 0 &&
1091                     pVolumeCB->VolumeReferenceCount == 1 &&
1092                     ( pVolumeCB->RootFcb == NULL ||
1093                       pVolumeCB->RootFcb->OpenReferenceCount == 0) &&
1094                     pVolumeCB->ObjectInformation.ObjectReferenceCount == 0)
1095                 {
1096
1097                     if( pVolumeCB->RootFcb != NULL)
1098                     {
1099
1100                         AFSRemoveRootFcb( pVolumeCB->RootFcb);
1101                     }
1102
1103                     AFSRemoveVolume( pVolumeCB);
1104                 }
1105                 else
1106                 {
1107
1108                     AFSReleaseResource( pVolumeCB->VolumeLock);
1109                 }
1110
1111                 AFSConvertToShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1112
1113                 AFSReleaseResource( pRDRDeviceExt->Specific.RDR.VolumeTree.TreeLock);
1114
1115                 pVolumeCB = pNextVolume;
1116
1117                 continue;
1118             }
1119
1120             //
1121             // Don't need this lock anymore now that we have a volume cb to work with
1122             //
1123
1124             AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1125
1126             //
1127             // For now we only need the volume lock shared
1128             //
1129
1130             AFSConvertToShared( pVolumeCB->VolumeLock);
1131
1132             if( AFSAcquireShared( pVolumeCB->ObjectInfoTree.TreeLock,
1133                                   FALSE))
1134             {
1135
1136                 pCurrentObject = pVolumeCB->ObjectInfoListHead;
1137
1138                 pNextObject = NULL;
1139
1140                 bReleaseVolumeLock = TRUE;
1141
1142                 while( pCurrentObject != NULL)
1143                 {
1144
1145                     if( pCurrentObject != &pVolumeCB->ObjectInformation)
1146                     {
1147
1148                         pNextObject = (AFSObjectInfoCB *)pCurrentObject->ListEntry.fLink;
1149
1150                         if( pNextObject == NULL &&
1151                             pVolumeCB != AFSGlobalRoot)  // Don't free up the root of the global
1152                         {
1153
1154                             pNextObject = &pVolumeCB->ObjectInformation;
1155                         }
1156
1157                         bVolumeObject = FALSE;
1158                     }
1159                     else
1160                     {
1161
1162                         pNextObject = NULL;
1163
1164                         bVolumeObject = TRUE;
1165                     }
1166
1167                     if( pCurrentObject->FileType == AFS_FILE_TYPE_DIRECTORY &&
1168                         !BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))  // If we are in shutdown mode skip directories
1169                     {
1170
1171                         //
1172                         // If this object is deleted then remove it from the parent, if we can
1173                         //
1174
1175                         if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DELETED) &&
1176                             pCurrentObject->ObjectReferenceCount == 0 &&
1177                             ( pCurrentObject->Fcb == NULL ||
1178                               pCurrentObject->Fcb->OpenReferenceCount == 0) &&
1179                             pCurrentObject->Specific.Directory.DirectoryNodeListHead == NULL &&
1180                             pCurrentObject->Specific.Directory.ChildOpenReferenceCount == 0)
1181                         {
1182
1183                             AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1184
1185                             if( AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1186                                                 FALSE))
1187                             {
1188
1189                                 if( pCurrentObject->Fcb != NULL)
1190                                 {
1191
1192                                     //
1193                                     // Acquire and drop the Fcb resource to synchronize
1194                                     // with a potentially active AFSCleanup() which sets
1195                                     // the OpenReferenceCount to zero while holding the
1196                                     // resource.
1197                                     //
1198
1199                                     AFSAcquireExcl( &pCurrentObject->Fcb->NPFcb->Resource,
1200                                                     TRUE);
1201
1202                                     AFSReleaseResource( &pCurrentObject->Fcb->NPFcb->Resource);
1203
1204                                     AFSRemoveFcb( &pCurrentObject->Fcb);
1205                                 }
1206
1207                                 if( pCurrentObject->Specific.Directory.PIOCtlDirectoryCB != NULL)
1208                                 {
1209
1210                                     if( pCurrentObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb != NULL)
1211                                     {
1212
1213                                         AFSRemoveFcb( &pCurrentObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb);
1214                                     }
1215
1216                                     AFSDeleteObjectInfo( pCurrentObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation);
1217
1218                                     ExDeleteResourceLite( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged->Lock);
1219
1220                                     AFSExFreePool( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged);
1221
1222                                     AFSExFreePool( pCurrentObject->Specific.Directory.PIOCtlDirectoryCB);
1223                                 }
1224
1225                                 AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1226                                               AFS_TRACE_LEVEL_VERBOSE,
1227                                               "AFSPrimaryWorker Deleting deleted object %08lX\n",
1228                                               pCurrentObject);
1229
1230                                 AFSDeleteObjectInfo( pCurrentObject);
1231
1232                                 AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1233
1234                                 pCurrentObject = pNextObject;
1235
1236                                 continue;
1237                             }
1238                             else
1239                             {
1240
1241                                 bReleaseVolumeLock = FALSE;
1242
1243                                 break;
1244                             }
1245                         }
1246
1247                         if( pCurrentObject->Specific.Directory.ChildOpenReferenceCount > 0 ||
1248                             ( pCurrentObject->Fcb != NULL &&
1249                               pCurrentObject->Fcb->OpenReferenceCount > 0) ||
1250                             pCurrentObject->Specific.Directory.DirectoryNodeListHead == NULL)
1251                         {
1252
1253                             pCurrentObject = pNextObject;
1254
1255                             continue;
1256                         }
1257
1258                         if( !AFSAcquireShared( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock,
1259                                                FALSE))
1260                         {
1261
1262                             pCurrentObject = pNextObject;
1263
1264                             continue;
1265                         }
1266
1267                         KeQueryTickCount( &liCurrentTime);
1268
1269                         pCurrentDirEntry = pCurrentObject->Specific.Directory.DirectoryNodeListHead;
1270
1271                         while( pCurrentDirEntry != NULL)
1272                         {
1273
1274                             if( pCurrentDirEntry->OpenReferenceCount > 0 ||
1275                                 ( pCurrentDirEntry->ObjectInformation->Fcb != NULL &&
1276                                   pCurrentDirEntry->ObjectInformation->Fcb->OpenReferenceCount > 0) ||
1277                                 liCurrentTime.QuadPart <= pCurrentDirEntry->ObjectInformation->LastAccessCount.QuadPart ||
1278                                 liCurrentTime.QuadPart - pCurrentDirEntry->ObjectInformation->LastAccessCount.QuadPart <
1279                                                                         pControlDeviceExt->Specific.Control.ObjectLifeTimeCount.QuadPart ||
1280                                 ( pCurrentDirEntry->ObjectInformation->FileType == AFS_FILE_TYPE_DIRECTORY &&
1281                                    ( pCurrentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeListHead != NULL ||
1282                                      pCurrentDirEntry->ObjectInformation->Specific.Directory.ChildOpenReferenceCount > 0)) ||
1283                                 ( pCurrentDirEntry->ObjectInformation->FileType == AFS_FILE_TYPE_FILE &&
1284                                   pCurrentDirEntry->ObjectInformation->Fcb != NULL &&
1285                                   pCurrentDirEntry->ObjectInformation->Fcb->Specific.File.ExtentsDirtyCount > 0))
1286                             {
1287
1288                                 break;
1289                             }
1290
1291                             pCurrentDirEntry = (AFSDirectoryCB *)pCurrentDirEntry->ListEntry.fLink;
1292                         }
1293
1294                         if( pCurrentDirEntry != NULL)
1295                         {
1296
1297                             AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1298
1299                             pCurrentObject = pNextObject;
1300
1301                             continue;
1302                         }
1303
1304                         AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1305
1306                         AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1307
1308                         //
1309                         // Now acquire the locks excl
1310                         //
1311
1312                         if( AFSAcquireExcl( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock,
1313                                             FALSE))
1314                         {
1315
1316                             if( AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1317                                                 FALSE))
1318                             {
1319
1320                                 if( pCurrentObject->Specific.Directory.ChildOpenReferenceCount > 0)
1321                                 {
1322
1323                                     AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1324
1325                                     AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1326
1327                                     pCurrentObject = pNextObject;
1328
1329                                     continue;
1330                                 }
1331
1332                                 KeQueryTickCount( &liCurrentTime);
1333
1334                                 pCurrentDirEntry = pCurrentObject->Specific.Directory.DirectoryNodeListHead;
1335
1336                                 while( pCurrentDirEntry != NULL)
1337                                 {
1338
1339                                     if( pCurrentDirEntry->OpenReferenceCount > 0 ||
1340                                         ( pCurrentDirEntry->ObjectInformation->Fcb != NULL &&
1341                                           pCurrentDirEntry->ObjectInformation->Fcb->OpenReferenceCount > 0) ||
1342                                         liCurrentTime.QuadPart <= pCurrentDirEntry->ObjectInformation->LastAccessCount.QuadPart ||
1343                                         liCurrentTime.QuadPart - pCurrentDirEntry->ObjectInformation->LastAccessCount.QuadPart <
1344                                                                                 pControlDeviceExt->Specific.Control.ObjectLifeTimeCount.QuadPart ||
1345                                         ( pCurrentDirEntry->ObjectInformation->FileType == AFS_FILE_TYPE_DIRECTORY &&
1346                                           ( pCurrentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeListHead != NULL ||
1347                                             pCurrentDirEntry->ObjectInformation->Specific.Directory.ChildOpenReferenceCount > 0)) ||
1348                                         ( pCurrentDirEntry->ObjectInformation->FileType == AFS_FILE_TYPE_FILE &&
1349                                           pCurrentDirEntry->ObjectInformation->Fcb != NULL &&
1350                                           pCurrentDirEntry->ObjectInformation->Fcb->Specific.File.ExtentsDirtyCount > 0))
1351                                     {
1352
1353                                         break;
1354                                     }
1355
1356                                     pCurrentDirEntry = (AFSDirectoryCB *)pCurrentDirEntry->ListEntry.fLink;
1357                                 }
1358
1359                                 if( pCurrentDirEntry != NULL)
1360                                 {
1361
1362                                     AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1363
1364                                     AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1365
1366                                     pCurrentObject = pNextObject;
1367
1368                                     continue;
1369                                 }
1370
1371                                 pCurrentDirEntry = pCurrentObject->Specific.Directory.DirectoryNodeListHead;
1372
1373                                 while( pCurrentDirEntry != NULL)
1374                                 {
1375
1376                                     pNextDirEntry = (AFSDirectoryCB *)pCurrentDirEntry->ListEntry.fLink;
1377
1378                                     pCurrentChildObject = pCurrentDirEntry->ObjectInformation;
1379
1380                                     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1381                                                   AFS_TRACE_LEVEL_VERBOSE,
1382                                                   "AFSPrimaryWorker Deleting DE %wZ Object %08lX\n",
1383                                                   &pCurrentDirEntry->NameInformation.FileName,
1384                                                   pCurrentChildObject);
1385
1386                                     AFSDeleteDirEntry( pCurrentObject,
1387                                                        pCurrentDirEntry);
1388
1389                                     if( pCurrentChildObject->ObjectReferenceCount == 0)
1390                                     {
1391
1392                                         if( pCurrentChildObject->Fcb != NULL)
1393                                         {
1394
1395                                             if( pCurrentChildObject->FileType == AFS_FILE_TYPE_FILE)
1396                                             {
1397
1398                                                 AFSCleanupFcb( pCurrentChildObject->Fcb,
1399                                                                TRUE);
1400                                             }
1401
1402                                             //
1403                                             // Acquire and drop the Fcb resource to synchronize
1404                                             // with a potentially active AFSCleanup() which sets
1405                                             // the OpenReferenceCount to zero while holding the
1406                                             // resource.
1407                                             //
1408
1409                                             AFSAcquireExcl( &pCurrentChildObject->Fcb->NPFcb->Resource,
1410                                                             TRUE);
1411
1412                                             AFSReleaseResource( &pCurrentChildObject->Fcb->NPFcb->Resource);
1413
1414                                             AFSRemoveFcb( &pCurrentChildObject->Fcb);
1415                                         }
1416
1417                                         if( pCurrentChildObject->FileType == AFS_FILE_TYPE_DIRECTORY &&
1418                                             pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB != NULL)
1419                                         {
1420
1421                                             if( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb != NULL)
1422                                             {
1423
1424                                                 AFSRemoveFcb( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb);
1425                                             }
1426
1427                                             AFSDeleteObjectInfo( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation);
1428
1429                                             ExDeleteResourceLite( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged->Lock);
1430
1431                                             AFSExFreePool( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged);
1432
1433                                             AFSExFreePool( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB);
1434                                         }
1435
1436                                         AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1437                                                       AFS_TRACE_LEVEL_VERBOSE,
1438                                                       "AFSPrimaryWorker Deleting object %08lX\n",
1439                                                       pCurrentChildObject);
1440
1441                                         AFSDeleteObjectInfo( pCurrentChildObject);
1442                                     }
1443
1444                                     pCurrentDirEntry = pNextDirEntry;
1445                                 }
1446
1447                                 pCurrentObject->Specific.Directory.DirectoryNodeListHead = NULL;
1448
1449                                 pCurrentObject->Specific.Directory.DirectoryNodeListTail = NULL;
1450
1451                                 pCurrentObject->Specific.Directory.ShortNameTree = NULL;
1452
1453                                 pCurrentObject->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead = NULL;
1454
1455                                 pCurrentObject->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead = NULL;
1456
1457                                 pCurrentObject->Specific.Directory.DirectoryNodeCount = 0;
1458
1459                                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
1460                                               AFS_TRACE_LEVEL_VERBOSE,
1461                                               "AFSPrimaryWorker Reset count to 0 on parent FID %08lX-%08lX-%08lX-%08lX\n",
1462                                               pCurrentObject->FileId.Cell,
1463                                               pCurrentObject->FileId.Volume,
1464                                               pCurrentObject->FileId.Vnode,
1465                                               pCurrentObject->FileId.Unique);
1466
1467
1468                                 //
1469                                 // Clear our enumerated flag on this object so we retrieve info again on next access
1470                                 //
1471
1472                                 ClearFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED);
1473
1474                                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1475                             }
1476                             else
1477                             {
1478
1479                                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1480
1481                                 bReleaseVolumeLock = FALSE;
1482
1483                                 break;
1484                             }
1485
1486                             AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1487                         }
1488                         else
1489                         {
1490
1491                             //
1492                             // Try to grab the volume lock again ... no problem if we don't
1493                             //
1494
1495                             if( !AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1496                                                  FALSE))
1497                             {
1498
1499                                 bReleaseVolumeLock = FALSE;
1500
1501                                 break;
1502                             }
1503                         }
1504
1505                         if( pCurrentObject != &pVolumeCB->ObjectInformation)
1506                         {
1507
1508                             pCurrentObject = (AFSObjectInfoCB *)pCurrentObject->ListEntry.fLink;
1509
1510                             if( pCurrentObject == NULL &&
1511                                 pVolumeCB != AFSGlobalRoot)
1512                             {
1513
1514                                 pCurrentObject = &pVolumeCB->ObjectInformation;
1515                             }
1516                         }
1517                         else
1518                         {
1519
1520                             pCurrentObject = NULL;
1521                         }
1522
1523                         continue;
1524                     }
1525                     else if( pCurrentObject->FileType == AFS_FILE_TYPE_FILE)
1526                     {
1527
1528                         if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DELETED) &&
1529                             pCurrentObject->ObjectReferenceCount == 0 &&
1530                             ( pCurrentObject->Fcb == NULL ||
1531                               pCurrentObject->Fcb->OpenReferenceCount == 0))
1532                         {
1533
1534                             AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1535
1536                             if( AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1537                                                 FALSE))
1538                             {
1539
1540                                 if( pCurrentObject->Fcb != NULL)
1541                                 {
1542
1543                                     AFSCleanupFcb( pCurrentObject->Fcb,
1544                                                    TRUE);
1545
1546                                     //
1547                                     // Acquire and drop the Fcb resource to synchronize
1548                                     // with a potentially active AFSCleanup() which sets
1549                                     // the OpenReferenceCount to zero while holding the
1550                                     // resource.
1551                                     //
1552
1553                                     AFSAcquireExcl( &pCurrentObject->Fcb->NPFcb->Resource,
1554                                                     TRUE);
1555
1556                                     AFSReleaseResource( &pCurrentObject->Fcb->NPFcb->Resource);
1557
1558                                     AFSRemoveFcb( &pCurrentObject->Fcb);
1559                                 }
1560
1561                                 AFSDeleteObjectInfo( pCurrentObject);
1562
1563                                 AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1564
1565                                 pCurrentObject = pNextObject;
1566
1567                                 continue;
1568                             }
1569                             else
1570                             {
1571
1572                                 bReleaseVolumeLock = FALSE;
1573
1574                                 break;
1575                             }
1576                         }
1577                         else if( pCurrentObject->Fcb != NULL)
1578                         {
1579
1580                             AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1581
1582                             if( AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1583                                                 FALSE))
1584                             {
1585
1586                                 AFSCleanupFcb( pCurrentObject->Fcb,
1587                                                FALSE);
1588
1589                                 AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1590
1591                                 pCurrentObject = pNextObject;
1592
1593                                 continue;
1594                             }
1595                             else
1596                             {
1597
1598                                 bReleaseVolumeLock = FALSE;
1599
1600                                 break;
1601                             }
1602                         }
1603                     }
1604
1605                     pCurrentObject = pNextObject;
1606                 }
1607
1608                 if( bReleaseVolumeLock)
1609                 {
1610
1611                     AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1612                 }
1613             }
1614
1615             //
1616             // Next volume cb
1617             //
1618
1619             AFSReleaseResource( pVolumeCB->VolumeLock);
1620
1621             AFSAcquireShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
1622                               TRUE);
1623
1624             pVolumeCB = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1625         }
1626
1627         AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1628
1629     } // worker thread loop
1630
1631     KeCancelTimer( &Timer);
1632
1633     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1634                   AFS_TRACE_LEVEL_VERBOSE,
1635                   "AFSPrimaryVolumeWorkerThread Exiting\n");
1636
1637     lCount = InterlockedDecrement( &pControlDeviceExt->Specific.Control.VolumeWorkerThreadCount);
1638
1639     if( lCount == 0)
1640     {
1641
1642         KeSetEvent( &pControlDeviceExt->Specific.Control.VolumeWorkerCloseEvent,
1643                     0,
1644                     FALSE);
1645     }
1646
1647     PsTerminateSystemThread( 0);
1648
1649     return;
1650 }
1651
1652 void
1653 AFSVolumeWorkerThread( IN PVOID Context)
1654 {
1655
1656     NTSTATUS ntStatus = STATUS_SUCCESS;
1657     AFSVolumeCB *pVolumeCB = (AFSVolumeCB * )Context;
1658     AFSWorkQueueContext *pPoolContext = (AFSWorkQueueContext *)&pVolumeCB->VolumeWorkerContext;
1659     AFSDeviceExt *pControlDeviceExt = NULL;
1660     AFSDeviceExt *pRDRDeviceExt = NULL;
1661     BOOLEAN exitThread = FALSE;
1662     LARGE_INTEGER DueTime;
1663     LONG TimeOut;
1664     KTIMER Timer;
1665     LONG lCount;
1666
1667     pControlDeviceExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
1668
1669     pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
1670
1671     //
1672     // Initialize the timer for the worker thread
1673     //
1674
1675     DueTime.QuadPart = -(5000);
1676
1677     TimeOut = 5000;
1678
1679     KeInitializeTimerEx( &Timer,
1680                          SynchronizationTimer);
1681
1682     KeSetTimerEx( &Timer,
1683                   DueTime,
1684                   TimeOut,
1685                   NULL);
1686
1687     //
1688     // Indicate that we are initialized and ready
1689     //
1690
1691     KeSetEvent( &pPoolContext->WorkerThreadReady,
1692                 0,
1693                 FALSE);
1694
1695     //
1696     // Indicate we are initialized
1697     //
1698
1699     SetFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
1700
1701     while( BooleanFlagOn( pPoolContext->State, AFS_WORKER_PROCESS_REQUESTS))
1702     {
1703
1704         ntStatus = KeWaitForSingleObject( &Timer,
1705                                           Executive,
1706                                           KernelMode,
1707                                           FALSE,
1708                                           NULL);
1709
1710         if( !NT_SUCCESS( ntStatus))
1711         {
1712
1713             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1714                           AFS_TRACE_LEVEL_ERROR,
1715                           "AFSVolumeWorkerThread Wait for queue items failed Status %08lX\n", ntStatus);
1716         }
1717         else
1718         {
1719
1720             //
1721             // If we are in shutdown mode and the dirty flag is clear then get out now
1722             //
1723
1724             if( BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))
1725             {
1726
1727                 break;
1728             }
1729         }
1730     } // worker thread loop
1731
1732     KeCancelTimer( &Timer);
1733
1734     lCount = InterlockedDecrement( &pControlDeviceExt->Specific.Control.VolumeWorkerThreadCount);
1735
1736     if( lCount == 0)
1737     {
1738
1739         KeSetEvent( &pControlDeviceExt->Specific.Control.VolumeWorkerCloseEvent,
1740                     0,
1741                     FALSE);
1742     }
1743
1744     PsTerminateSystemThread( 0);
1745
1746     return;
1747 }
1748
1749 NTSTATUS
1750 AFSInsertWorkitem( IN AFSWorkItem *WorkItem)
1751 {
1752
1753     NTSTATUS ntStatus = STATUS_SUCCESS;
1754     AFSDeviceExt *pDevExt = NULL;
1755     LONG lCount;
1756
1757     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1758
1759     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1760                   AFS_TRACE_LEVEL_VERBOSE,
1761                   "AFSInsertWorkitem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1762                   &pDevExt->Specific.Library.QueueLock,
1763                   PsGetCurrentThread());
1764
1765     AFSAcquireExcl( &pDevExt->Specific.Library.QueueLock,
1766                     TRUE);
1767
1768     lCount = InterlockedIncrement( &pDevExt->Specific.Library.QueueItemCount);
1769
1770     AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1771                   AFS_TRACE_LEVEL_VERBOSE,
1772                   "AFSInsertWorkitem Inserting work item %08lX Count %08lX\n",
1773                   WorkItem,
1774                   lCount);
1775
1776     if( pDevExt->Specific.Library.QueueTail != NULL) // queue already has nodes
1777     {
1778
1779         pDevExt->Specific.Library.QueueTail->next = WorkItem;
1780     }
1781     else // first node
1782     {
1783
1784         pDevExt->Specific.Library.QueueHead = WorkItem;
1785     }
1786
1787     WorkItem->next = NULL;
1788     pDevExt->Specific.Library.QueueTail = WorkItem;
1789
1790     // indicate that the queue has nodes
1791     KeSetEvent( &(pDevExt->Specific.Library.WorkerQueueHasItems),
1792                 0,
1793                 FALSE);
1794
1795     AFSReleaseResource( &pDevExt->Specific.Library.QueueLock);
1796
1797     return ntStatus;
1798 }
1799
1800 NTSTATUS
1801 AFSInsertIOWorkitem( IN AFSWorkItem *WorkItem)
1802 {
1803
1804     NTSTATUS ntStatus = STATUS_SUCCESS;
1805     AFSDeviceExt *pDevExt = NULL;
1806     LONG lCount;
1807
1808     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1809
1810     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1811                   AFS_TRACE_LEVEL_VERBOSE,
1812                   "AFSInsertIOWorkitem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1813                   &pDevExt->Specific.Library.IOQueueLock,
1814                   PsGetCurrentThread());
1815
1816     AFSAcquireExcl( &pDevExt->Specific.Library.IOQueueLock,
1817                     TRUE);
1818
1819     lCount = InterlockedIncrement( &pDevExt->Specific.Library.IOQueueItemCount);
1820
1821     AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1822                   AFS_TRACE_LEVEL_VERBOSE,
1823                   "AFSInsertWorkitem Inserting IO work item %08lX Count %08lX\n",
1824                   WorkItem,
1825                   lCount);
1826
1827     if( pDevExt->Specific.Library.IOQueueTail != NULL) // queue already has nodes
1828     {
1829
1830         pDevExt->Specific.Library.IOQueueTail->next = WorkItem;
1831     }
1832     else // first node
1833     {
1834
1835         pDevExt->Specific.Library.IOQueueHead = WorkItem;
1836     }
1837
1838     WorkItem->next = NULL;
1839     pDevExt->Specific.Library.IOQueueTail = WorkItem;
1840
1841     // indicate that the queue has nodes
1842     KeSetEvent( &(pDevExt->Specific.Library.IOWorkerQueueHasItems),
1843                 0,
1844                 FALSE);
1845
1846     AFSReleaseResource( &pDevExt->Specific.Library.IOQueueLock);
1847
1848     return ntStatus;
1849 }
1850
1851 NTSTATUS
1852 AFSInsertWorkitemAtHead( IN AFSWorkItem *WorkItem)
1853 {
1854
1855     NTSTATUS ntStatus = STATUS_SUCCESS;
1856     AFSDeviceExt *pDevExt = NULL;
1857     LONG lCount;
1858
1859     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1860
1861     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1862                   AFS_TRACE_LEVEL_VERBOSE,
1863                   "AFSInsertWorkitemAtHead Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1864                   &pDevExt->Specific.Library.QueueLock,
1865                   PsGetCurrentThread());
1866
1867     AFSAcquireExcl( &pDevExt->Specific.Library.QueueLock,
1868                     TRUE);
1869
1870     WorkItem->next = pDevExt->Specific.Library.QueueHead;
1871
1872     pDevExt->Specific.Library.QueueHead = WorkItem;
1873
1874     lCount = InterlockedIncrement( &pDevExt->Specific.Library.QueueItemCount);
1875
1876     AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1877                   AFS_TRACE_LEVEL_VERBOSE,
1878                   "AFSInsertWorkitemAtHead Inserting work item %08lX Count %08lX\n",
1879                   WorkItem,
1880                   lCount);
1881
1882     //
1883     // indicate that the queue has nodes
1884     //
1885
1886     KeSetEvent( &(pDevExt->Specific.Library.WorkerQueueHasItems),
1887                 0,
1888                 FALSE);
1889
1890     AFSReleaseResource( &pDevExt->Specific.Library.QueueLock);
1891
1892     return ntStatus;
1893 }
1894
1895 AFSWorkItem *
1896 AFSRemoveWorkItem()
1897 {
1898
1899     NTSTATUS ntStatus = STATUS_SUCCESS;
1900     AFSWorkItem        *pWorkItem = NULL;
1901     AFSDeviceExt *pDevExt = NULL;
1902     LONG lCount;
1903
1904     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1905
1906     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1907                   AFS_TRACE_LEVEL_VERBOSE,
1908                   "AFSRemoveWorkItem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1909                   &pDevExt->Specific.Library.QueueLock,
1910                   PsGetCurrentThread());
1911
1912     AFSAcquireExcl( &pDevExt->Specific.Library.QueueLock,
1913                     TRUE);
1914
1915     if( pDevExt->Specific.Library.QueueHead != NULL) // queue has nodes
1916     {
1917
1918         pWorkItem = pDevExt->Specific.Library.QueueHead;
1919
1920         lCount = InterlockedDecrement( &pDevExt->Specific.Library.QueueItemCount);
1921
1922         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1923                       AFS_TRACE_LEVEL_VERBOSE,
1924                       "AFSRemoveWorkItem Removing work item %08lX Count %08lX Thread %08lX\n",
1925                       pWorkItem,
1926                       lCount,
1927                       PsGetCurrentThreadId());
1928
1929         pDevExt->Specific.Library.QueueHead = pDevExt->Specific.Library.QueueHead->next;
1930
1931         if( pDevExt->Specific.Library.QueueHead == NULL) // if queue just became empty
1932         {
1933
1934             pDevExt->Specific.Library.QueueTail = NULL;
1935         }
1936         else
1937         {
1938
1939             //
1940             // Wake up another worker
1941             //
1942
1943             KeSetEvent( &(pDevExt->Specific.Library.WorkerQueueHasItems),
1944                         0,
1945                         FALSE);
1946         }
1947     }
1948
1949     AFSReleaseResource( &pDevExt->Specific.Library.QueueLock);
1950
1951     return pWorkItem;
1952 }
1953
1954 AFSWorkItem *
1955 AFSRemoveIOWorkItem()
1956 {
1957
1958     NTSTATUS ntStatus = STATUS_SUCCESS;
1959     AFSWorkItem        *pWorkItem = NULL;
1960     AFSDeviceExt *pDevExt = NULL;
1961     LONG lCount;
1962
1963     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1964
1965     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1966                   AFS_TRACE_LEVEL_VERBOSE,
1967                   "AFSRemoveIOWorkItem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1968                   &pDevExt->Specific.Library.IOQueueLock,
1969                   PsGetCurrentThread());
1970
1971     AFSAcquireExcl( &pDevExt->Specific.Library.IOQueueLock,
1972                     TRUE);
1973
1974     if( pDevExt->Specific.Library.IOQueueHead != NULL) // queue has nodes
1975     {
1976
1977         pWorkItem = pDevExt->Specific.Library.IOQueueHead;
1978
1979         lCount = InterlockedDecrement( &pDevExt->Specific.Library.IOQueueItemCount);
1980
1981         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1982                       AFS_TRACE_LEVEL_VERBOSE,
1983                       "AFSRemoveWorkItem Removing work item %08lX Count %08lX Thread %08lX\n",
1984                       pWorkItem,
1985                       lCount,
1986                       PsGetCurrentThreadId());
1987
1988         pDevExt->Specific.Library.IOQueueHead = pDevExt->Specific.Library.IOQueueHead->next;
1989
1990         if( pDevExt->Specific.Library.IOQueueHead == NULL) // if queue just became empty
1991         {
1992
1993             pDevExt->Specific.Library.IOQueueTail = NULL;
1994         }
1995         else
1996         {
1997
1998             //
1999             // Wake up another worker
2000             //
2001
2002             KeSetEvent( &(pDevExt->Specific.Library.IOWorkerQueueHasItems),
2003                         0,
2004                         FALSE);
2005         }
2006     }
2007
2008     AFSReleaseResource( &pDevExt->Specific.Library.IOQueueLock);
2009
2010     return pWorkItem;
2011 }
2012
2013 NTSTATUS
2014 AFSQueueWorkerRequest( IN AFSWorkItem *WorkItem)
2015 {
2016
2017     NTSTATUS ntStatus = STATUS_SUCCESS;
2018     AFSDeviceExt *pDevExt = NULL;
2019     BOOLEAN bWait = BooleanFlagOn( WorkItem->RequestFlags, AFS_SYNCHRONOUS_REQUEST);
2020
2021     //
2022     // Submit the work item to the worker
2023     //
2024
2025     ntStatus = AFSInsertWorkitem( WorkItem);
2026
2027     if( bWait)
2028     {
2029
2030         //
2031         // Sync request so block on the work item event
2032         //
2033
2034         ntStatus = KeWaitForSingleObject( &WorkItem->Event,
2035                                           Executive,
2036                                           KernelMode,
2037                                           FALSE,
2038                                           NULL);
2039     }
2040
2041     return ntStatus;
2042 }
2043
2044 NTSTATUS
2045 AFSQueueIOWorkerRequest( IN AFSWorkItem *WorkItem)
2046 {
2047
2048     NTSTATUS ntStatus = STATUS_SUCCESS;
2049     AFSDeviceExt *pDevExt = NULL;
2050     BOOLEAN bWait = BooleanFlagOn( WorkItem->RequestFlags, AFS_SYNCHRONOUS_REQUEST);
2051
2052     //
2053     // Submit the work item to the worker
2054     //
2055
2056     ntStatus = AFSInsertIOWorkitem( WorkItem);
2057
2058     if( bWait)
2059     {
2060
2061         //
2062         // Sync request so block on the work item event
2063         //
2064
2065         ntStatus = KeWaitForSingleObject( &WorkItem->Event,
2066                                           Executive,
2067                                           KernelMode,
2068                                           FALSE,
2069                                           NULL);
2070     }
2071
2072     return ntStatus;
2073 }
2074
2075 NTSTATUS
2076 AFSQueueWorkerRequestAtHead( IN AFSWorkItem *WorkItem)
2077 {
2078
2079     NTSTATUS ntStatus = STATUS_SUCCESS;
2080     AFSDeviceExt *pDevExt = NULL;
2081     BOOLEAN bWait = BooleanFlagOn( WorkItem->RequestFlags, AFS_SYNCHRONOUS_REQUEST);
2082
2083     //
2084     // Submit the work item to the worker
2085     //
2086
2087     ntStatus = AFSInsertWorkitemAtHead( WorkItem);
2088
2089     if( bWait)
2090     {
2091
2092         //
2093         // Sync request so block on the work item event
2094         //
2095
2096         ntStatus = KeWaitForSingleObject( &WorkItem->Event,
2097                                           Executive,
2098                                           KernelMode,
2099                                           FALSE,
2100                                           NULL);
2101     }
2102
2103     return ntStatus;
2104 }
2105
2106 NTSTATUS
2107 AFSQueueFlushExtents( IN AFSFcb *Fcb,
2108                       IN GUID *AuthGroup)
2109 {
2110
2111     NTSTATUS ntStatus = STATUS_SUCCESS;
2112     AFSDeviceExt *pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2113     AFSWorkItem *pWorkItem = NULL;
2114     LONG lCount;
2115
2116     __try
2117     {
2118
2119         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2120                       AFS_TRACE_LEVEL_VERBOSE,
2121                       "AFSQueueFlushExtents Queuing request for FID %08lX-%08lX-%08lX-%08lX\n",
2122                       Fcb->ObjectInformation->FileId.Cell,
2123                       Fcb->ObjectInformation->FileId.Volume,
2124                       Fcb->ObjectInformation->FileId.Vnode,
2125                       Fcb->ObjectInformation->FileId.Unique);
2126
2127         //
2128         // Increment our flush count here just to keep the number of items in the
2129         // queue down. We'll decrement it just below.
2130         //
2131
2132         lCount = InterlockedIncrement( &Fcb->Specific.File.QueuedFlushCount);
2133
2134         if( lCount > 3)
2135         {
2136
2137             AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2138                           AFS_TRACE_LEVEL_VERBOSE,
2139                           "AFSQueueFlushExtents Max queued items for FID %08lX-%08lX-%08lX-%08lX\n",
2140                           Fcb->ObjectInformation->FileId.Cell,
2141                           Fcb->ObjectInformation->FileId.Volume,
2142                           Fcb->ObjectInformation->FileId.Vnode,
2143                           Fcb->ObjectInformation->FileId.Unique);
2144
2145             try_return( ntStatus);
2146         }
2147
2148         if( BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))
2149         {
2150
2151             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2152                           AFS_TRACE_LEVEL_ERROR,
2153                           "AFSQueueFlushExtents Failing request, in shutdown\n");
2154
2155             try_return( ntStatus = STATUS_TOO_LATE);
2156         }
2157
2158         //
2159         // Allocate our request structure and send it to the worker
2160         //
2161
2162         pWorkItem = (AFSWorkItem *)AFSLibExAllocatePoolWithTag( NonPagedPool,
2163                                                                 sizeof( AFSWorkItem),
2164                                                                 AFS_WORK_ITEM_TAG);
2165
2166         if( pWorkItem == NULL)
2167         {
2168
2169             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2170                           AFS_TRACE_LEVEL_ERROR,
2171                           "AFSQueueFlushExtents Failed to allocate work item\n");
2172
2173             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2174         }
2175
2176         RtlZeroMemory( pWorkItem,
2177                        sizeof( AFSWorkItem));
2178
2179         pWorkItem->Size = sizeof( AFSWorkItem);
2180
2181         pWorkItem->ProcessID = (ULONGLONG)PsGetCurrentProcessId();
2182
2183         pWorkItem->RequestType = AFS_WORK_FLUSH_FCB;
2184
2185         RtlCopyMemory( &pWorkItem->AuthGroup,
2186                        AuthGroup,
2187                        sizeof( GUID));
2188
2189         pWorkItem->Specific.Fcb.Fcb = Fcb;
2190
2191         lCount = InterlockedIncrement( &Fcb->OpenReferenceCount);
2192
2193         AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
2194                       AFS_TRACE_LEVEL_VERBOSE,
2195                       "AFSQueueFlushExtents Increment count on Fcb %08lX Cnt %d\n",
2196                       Fcb,
2197                       lCount);
2198
2199         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2200                       AFS_TRACE_LEVEL_VERBOSE,
2201                       "AFSQueueFlushExtents Workitem %08lX for FID %08lX-%08lX-%08lX-%08lX\n",
2202                       pWorkItem,
2203                       Fcb->ObjectInformation->FileId.Cell,
2204                       Fcb->ObjectInformation->FileId.Volume,
2205                       Fcb->ObjectInformation->FileId.Vnode,
2206                       Fcb->ObjectInformation->FileId.Unique);
2207
2208         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2209
2210 try_exit:
2211
2212         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2213                       AFS_TRACE_LEVEL_VERBOSE,
2214                       "AFSQueueFlushExtents Request complete Status %08lX FID %08lX-%08lX-%08lX-%08lX\n",
2215                       Fcb->ObjectInformation->FileId.Cell,
2216                       Fcb->ObjectInformation->FileId.Volume,
2217                       Fcb->ObjectInformation->FileId.Vnode,
2218                       Fcb->ObjectInformation->FileId.Unique,
2219                       ntStatus);
2220
2221         //
2222         // Remove the count we added above
2223         //
2224
2225         lCount = InterlockedDecrement( &Fcb->Specific.File.QueuedFlushCount);
2226
2227         if( lCount == 0)
2228         {
2229
2230             KeSetEvent( &Fcb->NPFcb->Specific.File.QueuedFlushEvent,
2231                         0,
2232                         FALSE);
2233         }
2234
2235         if( !NT_SUCCESS( ntStatus))
2236         {
2237
2238             if( pWorkItem != NULL)
2239             {
2240
2241                 lCount = InterlockedDecrement( &Fcb->OpenReferenceCount);
2242
2243                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2244             }
2245
2246             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2247                           AFS_TRACE_LEVEL_ERROR,
2248                           "AFSQueueFlushExtents Failed to queue request Status %08lX\n", ntStatus);
2249         }
2250     }
2251     __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
2252     {
2253
2254         AFSDbgLogMsg( 0,
2255                       0,
2256                       "EXCEPTION - AFSQueueFlushExtents\n");
2257     }
2258
2259     return ntStatus;
2260 }
2261
2262 NTSTATUS
2263 AFSQueueAsyncRead( IN PDEVICE_OBJECT DeviceObject,
2264                    IN PIRP Irp,
2265                    IN HANDLE CallerProcess)
2266 {
2267
2268     NTSTATUS ntStatus = STATUS_SUCCESS;
2269     AFSWorkItem *pWorkItem = NULL;
2270
2271     __try
2272     {
2273
2274         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2275                       AFS_TRACE_LEVEL_VERBOSE,
2276                       "AFSQueueAsyncRead Queuing request for Irp %08lX\n",
2277                       Irp);
2278
2279         pWorkItem = (AFSWorkItem *) AFSLibExAllocatePoolWithTag( NonPagedPool,
2280                                                                  sizeof(AFSWorkItem),
2281                                                                  AFS_WORK_ITEM_TAG);
2282         if (NULL == pWorkItem)
2283         {
2284
2285             AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2286                           AFS_TRACE_LEVEL_ERROR,
2287                           "AFSQueueAsyncRead Failed to allocate work item\n");
2288
2289             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES );
2290         }
2291
2292         RtlZeroMemory( pWorkItem,
2293                        sizeof(AFSWorkItem));
2294
2295         pWorkItem->Size = sizeof( AFSWorkItem);
2296
2297         pWorkItem->RequestType = AFS_WORK_ASYNCH_READ;
2298
2299         pWorkItem->Specific.AsynchIo.Device = DeviceObject;
2300
2301         pWorkItem->Specific.AsynchIo.Irp = Irp;
2302
2303         pWorkItem->Specific.AsynchIo.CallingProcess = CallerProcess;
2304
2305         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2306                       AFS_TRACE_LEVEL_VERBOSE,
2307                       "AFSQueueAsyncRead Workitem %08lX for Irp %08lX\n",
2308                       pWorkItem,
2309                       Irp);
2310
2311         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2312
2313 try_exit:
2314
2315         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2316                       AFS_TRACE_LEVEL_VERBOSE,
2317                       "AFSQueueAsyncRead Request for Irp %08lX complete Status %08lX\n",
2318                       Irp,
2319                       ntStatus);
2320
2321         if( !NT_SUCCESS( ntStatus))
2322         {
2323
2324             if( pWorkItem != NULL)
2325             {
2326
2327                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2328             }
2329
2330             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2331                           AFS_TRACE_LEVEL_ERROR,
2332                           "AFSQueueAsyncRead Failed to queue request Status %08lX\n", ntStatus);
2333         }
2334     }
2335     __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
2336     {
2337
2338         AFSDbgLogMsg( 0,
2339                       0,
2340                       "EXCEPTION - AFSQueueAsyncRead\n");
2341     }
2342
2343     return ntStatus;
2344 }
2345
2346 NTSTATUS
2347 AFSQueueAsyncWrite( IN PDEVICE_OBJECT DeviceObject,
2348                     IN PIRP Irp,
2349                     IN HANDLE CallerProcess)
2350 {
2351
2352     NTSTATUS ntStatus = STATUS_SUCCESS;
2353     AFSWorkItem *pWorkItem = NULL;
2354
2355     __try
2356     {
2357
2358         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2359                       AFS_TRACE_LEVEL_VERBOSE,
2360                       "AFSQueueAsyncWrite Queuing request for Irp %08lX\n",
2361                       Irp);
2362
2363         pWorkItem = (AFSWorkItem *) AFSLibExAllocatePoolWithTag( NonPagedPool,
2364                                                                  sizeof(AFSWorkItem),
2365                                                                  AFS_WORK_ITEM_TAG);
2366         if (NULL == pWorkItem)
2367         {
2368
2369             AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2370                           AFS_TRACE_LEVEL_ERROR,
2371                           "AFSQueueAsyncWrite Failed to allocate work item\n");
2372
2373             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES );
2374         }
2375
2376         RtlZeroMemory( pWorkItem,
2377                        sizeof(AFSWorkItem));
2378
2379         pWorkItem->Size = sizeof( AFSWorkItem);
2380
2381         pWorkItem->RequestType = AFS_WORK_ASYNCH_WRITE;
2382
2383         pWorkItem->Specific.AsynchIo.Device = DeviceObject;
2384
2385         pWorkItem->Specific.AsynchIo.Irp = Irp;
2386
2387         pWorkItem->Specific.AsynchIo.CallingProcess = CallerProcess;
2388
2389         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2390                       AFS_TRACE_LEVEL_VERBOSE,
2391                       "AFSQueueAsyncWrite Workitem %08lX for Irp %08lX\n",
2392                       pWorkItem,
2393                       Irp);
2394
2395         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2396
2397 try_exit:
2398
2399         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2400                       AFS_TRACE_LEVEL_VERBOSE,
2401                       "AFSQueueAsyncWrite Request for Irp %08lX complete Status %08lX\n",
2402                       Irp,
2403                       ntStatus);
2404
2405         if( !NT_SUCCESS( ntStatus))
2406         {
2407
2408             if( pWorkItem != NULL)
2409             {
2410
2411                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2412             }
2413
2414             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2415                           AFS_TRACE_LEVEL_ERROR,
2416                           "AFSQueueAsyncWrite Failed to queue request Status %08lX\n", ntStatus);
2417         }
2418     }
2419     __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
2420     {
2421
2422         AFSDbgLogMsg( 0,
2423                       0,
2424                       "EXCEPTION - AFSQueueAsyncWrite\n");
2425     }
2426
2427     return ntStatus;
2428 }
2429
2430 NTSTATUS
2431 AFSQueueGlobalRootEnumeration()
2432 {
2433
2434     NTSTATUS ntStatus = STATUS_SUCCESS;
2435     AFSWorkItem *pWorkItem = NULL;
2436
2437     __try
2438     {
2439
2440         pWorkItem = (AFSWorkItem *) AFSLibExAllocatePoolWithTag( NonPagedPool,
2441                                                                  sizeof(AFSWorkItem),
2442                                                                  AFS_WORK_ITEM_TAG);
2443         if (NULL == pWorkItem)
2444         {
2445
2446             AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2447                           AFS_TRACE_LEVEL_ERROR,
2448                           "AFSQueueGlobalRootEnumeration Failed to allocate work item\n");
2449
2450             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES );
2451         }
2452
2453         RtlZeroMemory( pWorkItem,
2454                        sizeof(AFSWorkItem));
2455
2456         pWorkItem->Size = sizeof( AFSWorkItem);
2457
2458         pWorkItem->RequestType = AFS_WORK_ENUMERATE_GLOBAL_ROOT;
2459
2460         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2461                       AFS_TRACE_LEVEL_VERBOSE,
2462                       "AFSQueueGlobalRootEnumeration Workitem %08lX\n",
2463                       pWorkItem);
2464
2465         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2466
2467 try_exit:
2468
2469         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2470                       AFS_TRACE_LEVEL_VERBOSE,
2471                       "AFSQueueGlobalRootEnumeration Request complete Status %08lX\n",
2472                       ntStatus);
2473
2474         if( !NT_SUCCESS( ntStatus))
2475         {
2476
2477             if( pWorkItem != NULL)
2478             {
2479
2480                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2481             }
2482
2483             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2484                           AFS_TRACE_LEVEL_ERROR,
2485                           "AFSQueueGlobalRootEnumeration Failed to queue request Status %08lX\n",
2486                           ntStatus);
2487         }
2488     }
2489     __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
2490     {
2491
2492         AFSDbgLogMsg( 0,
2493                       0,
2494                       "EXCEPTION - AFSQueueGlobalRootEnumeration\n");
2495     }
2496
2497     return ntStatus;
2498 }
2499
2500 NTSTATUS
2501 AFSQueueStartIos( IN PFILE_OBJECT CacheFileObject,
2502                   IN UCHAR FunctionCode,
2503                   IN ULONG RequestFlags,
2504                   IN AFSIoRun *IoRuns,
2505                   IN ULONG RunCount,
2506                   IN AFSGatherIo *GatherIo)
2507 {
2508
2509     NTSTATUS ntStatus = STATUS_SUCCESS;
2510     AFSDeviceExt *pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2511     AFSWorkItem *pWorkItem = NULL;
2512
2513     __try
2514     {
2515
2516         if( BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))
2517         {
2518
2519             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2520                           AFS_TRACE_LEVEL_ERROR,
2521                           "AFSQueueStartIos Failing request, in shutdown\n");
2522
2523             try_return( ntStatus = STATUS_TOO_LATE);
2524         }
2525
2526         //
2527         // Allocate our request structure and send it to the worker
2528         //
2529
2530         pWorkItem = (AFSWorkItem *)AFSLibExAllocatePoolWithTag( NonPagedPool,
2531                                                                 sizeof( AFSWorkItem),
2532                                                                 AFS_WORK_ITEM_TAG);
2533
2534         if( pWorkItem == NULL)
2535         {
2536
2537             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2538                           AFS_TRACE_LEVEL_ERROR,
2539                           "AFSQueueStartIos Failed to allocate work item\n");
2540
2541             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2542         }
2543
2544         RtlZeroMemory( pWorkItem,
2545                        sizeof( AFSWorkItem));
2546
2547         KeInitializeEvent( &pWorkItem->Event,
2548                            NotificationEvent,
2549                            FALSE);
2550
2551         pWorkItem->Size = sizeof( AFSWorkItem);
2552
2553         pWorkItem->ProcessID = (ULONGLONG)PsGetCurrentProcessId();
2554
2555         pWorkItem->RequestType = AFS_WORK_START_IOS;
2556
2557         pWorkItem->Specific.CacheAccess.CacheFileObject = CacheFileObject;
2558
2559         pWorkItem->Specific.CacheAccess.FunctionCode = FunctionCode;
2560
2561         pWorkItem->Specific.CacheAccess.RequestFlags = RequestFlags;
2562
2563         pWorkItem->Specific.CacheAccess.IoRuns = IoRuns;
2564
2565         pWorkItem->Specific.CacheAccess.RunCount = RunCount;
2566
2567         pWorkItem->Specific.CacheAccess.GatherIo = GatherIo;
2568
2569         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2570                       AFS_TRACE_LEVEL_VERBOSE,
2571                       "AFSQueueStartIos Queuing IO Workitem %08lX\n",
2572                       pWorkItem);
2573
2574         ntStatus = AFSQueueIOWorkerRequest( pWorkItem);
2575
2576 try_exit:
2577
2578         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2579                       AFS_TRACE_LEVEL_VERBOSE,
2580                       "AFSQueueStartIos Request complete Status %08lX\n",
2581                       ntStatus);
2582
2583         if( !NT_SUCCESS( ntStatus))
2584         {
2585
2586             if( pWorkItem != NULL)
2587             {
2588
2589                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2590             }
2591         }
2592     }
2593     __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
2594     {
2595
2596         AFSDbgLogMsg( 0,
2597                       0,
2598                       "EXCEPTION - AFSQueueStartIos\n");
2599     }
2600
2601     return ntStatus;
2602 }
2603
2604 NTSTATUS
2605 AFSQueueInvalidateObject( IN AFSObjectInfoCB *ObjectInfo,
2606                           IN ULONG InvalidateReason)
2607 {
2608
2609     NTSTATUS ntStatus = STATUS_SUCCESS;
2610     AFSWorkItem *pWorkItem = NULL;
2611
2612     __try
2613     {
2614
2615         pWorkItem = (AFSWorkItem *) AFSLibExAllocatePoolWithTag( NonPagedPool,
2616                                                                  sizeof(AFSWorkItem),
2617                                                                  AFS_WORK_ITEM_TAG);
2618         if (NULL == pWorkItem)
2619         {
2620
2621             AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2622                           AFS_TRACE_LEVEL_ERROR,
2623                           "AFSQueueInvalidateObject Failed to allocate work item\n");
2624
2625             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES );
2626         }
2627
2628         RtlZeroMemory( pWorkItem,
2629                        sizeof(AFSWorkItem));
2630
2631         pWorkItem->Size = sizeof( AFSWorkItem);
2632
2633         pWorkItem->RequestType = AFS_WORK_INVALIDATE_OBJECT;
2634
2635         pWorkItem->Specific.Invalidate.ObjectInfo = ObjectInfo;
2636
2637         pWorkItem->Specific.Invalidate.InvalidateReason = InvalidateReason;
2638
2639         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2640                       AFS_TRACE_LEVEL_VERBOSE,
2641                       "AFSQueueInvalidateObject Workitem %08lX\n",
2642                       pWorkItem);
2643
2644         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2645
2646 try_exit:
2647
2648         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2649                       AFS_TRACE_LEVEL_VERBOSE,
2650                       "AFSQueueInvalidateObject Request complete Status %08lX\n",
2651                       ntStatus);
2652
2653         if( !NT_SUCCESS( ntStatus))
2654         {
2655
2656             if( pWorkItem != NULL)
2657             {
2658                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2659             }
2660
2661             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2662                           AFS_TRACE_LEVEL_ERROR,
2663                           "AFSQueueInvalidateObject Failed to queue request Status %08lX\n",
2664                           ntStatus);
2665         }
2666     }
2667     __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
2668     {
2669
2670         AFSDbgLogMsg( 0,
2671                       0,
2672                       "EXCEPTION - AFSQueueInvalidateObject\n");
2673     }
2674
2675     return ntStatus;
2676 }