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  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * - Redistributions of source code must retain the above copyright notice,
  11  *   this list of conditions and the following disclaimer.
  12  * - Redistributions in binary form must reproduce the above copyright
  13  *   notice,
  14  *   this list of conditions and the following disclaimer in the
  15  *   documentation
  16  *   and/or other materials provided with the distribution.
  17  * - Neither the names of Kernel Drivers, LLC and Your File System, Inc.
  18  *   nor the names of their contributors may be used to endorse or promote
  19  *   products derived from this software without specific prior written
  20  *   permission from Kernel Drivers, LLC and Your File System, Inc.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  25  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  26  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  27  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  28  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  29  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  30  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  31  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  32  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 //
  36 // File: 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                                                         FALSE);
 744                         }
 745
 746                         ASSERT( pWorkItem->Specific.Fcb.Fcb->OpenReferenceCount != 0);
 747
 748                         lCount = InterlockedDecrement( &pWorkItem->Specific.Fcb.Fcb->OpenReferenceCount);
 749
 750                         break;
 751                     }
 752
 753                     case AFS_WORK_ENUMERATE_GLOBAL_ROOT:
 754                     {
 755
 756                         AFSEnumerateGlobalRoot( NULL);
 757
 758                         break;
 759                     }
 760
 761                     case AFS_WORK_INVALIDATE_OBJECT:
 762                     {
 763
 764                         AFSPerformObjectInvalidate( pWorkItem->Specific.Invalidate.ObjectInfo,
 765                                                     pWorkItem->Specific.Invalidate.InvalidateReason);
 766
 767                         freeWorkItem = TRUE;
 768
 769                         break;
 770                     }
 771
 772                     case AFS_WORK_START_IOS:
 773                     {
 774
 775                         freeWorkItem = TRUE;
 776
 777                         break;
 778                     }
 779
 780                     default:
 781
 782                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 783                                       AFS_TRACE_LEVEL_ERROR,
 784                                       "AFSWorkerThread Unknown request type %d\n", pWorkItem->RequestType);
 785
 786                         break;
 787                 }
 788
 789                 if( freeWorkItem)
 790                 {
 791
 792                     ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
 793                 }
 794
 795                 ntStatus = STATUS_SUCCESS;
 796             }
 797         }
 798     } // worker thread loop
 799
 800     ClearFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
 801
 802     // Wake up another worker so they too can exit
 803
 804     KeSetEvent( &pLibraryDevExt->Specific.Library.WorkerQueueHasItems,
 805                 0,
 806                 FALSE);
 807
 808     PsTerminateSystemThread( 0);
 809
 810     return;
 811 }
 812
 813 void
 814 AFSIOWorkerThread( IN PVOID Context)
 815 {
 816
 817     NTSTATUS ntStatus = STATUS_SUCCESS;
 818     AFSWorkQueueContext *pPoolContext = (AFSWorkQueueContext *)Context;
 819     AFSWorkItem *pWorkItem;
 820     BOOLEAN freeWorkItem = TRUE;
 821     AFSDeviceExt *pLibraryDevExt = NULL, *pRdrDevExt = NULL;
 822
 823     pLibraryDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
 824
 825     //
 826     // Indicate that we are initialized and ready
 827     //
 828
 829     KeSetEvent( &pPoolContext->WorkerThreadReady,
 830                 0,
 831                 FALSE);
 832
 833
 834     //
 835     // Indicate we are initialized
 836     //
 837
 838     SetFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
 839
 840     ntStatus = KeWaitForSingleObject( &pLibraryDevExt->Specific.Library.IOWorkerQueueHasItems,
 841                                       Executive,
 842                                       KernelMode,
 843                                       FALSE,
 844                                       NULL);
 845
 846     while( BooleanFlagOn( pPoolContext->State, AFS_WORKER_PROCESS_REQUESTS))
 847     {
 848
 849         if( !NT_SUCCESS( ntStatus))
 850         {
 851
 852             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 853                           AFS_TRACE_LEVEL_ERROR,
 854                           "AFSIOWorkerThread Wait for queue items failed Status %08lX\n", ntStatus);
 855
 856             ntStatus = STATUS_SUCCESS;
 857         }
 858         else
 859         {
 860
 861             pWorkItem = AFSRemoveIOWorkItem();
 862
 863             if( pWorkItem == NULL)
 864             {
 865
 866                 ntStatus = KeWaitForSingleObject( &pLibraryDevExt->Specific.Library.IOWorkerQueueHasItems,
 867                                                   Executive,
 868                                                   KernelMode,
 869                                                   FALSE,
 870                                                   NULL);
 871             }
 872             else
 873             {
 874
 875                 freeWorkItem = TRUE;
 876
 877                 //
 878                 // Switch on the type of work item to process
 879                 //
 880
 881                 switch( pWorkItem->RequestType)
 882                 {
 883
 884                     case AFS_WORK_START_IOS:
 885                     {
 886
 887                         pRdrDevExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
 888
 889                         //
 890                         // The final status is in the gather io
 891                         //
 892
 893                         ntStatus = AFSStartIos( pWorkItem->Specific.CacheAccess.CacheFileObject,
 894                                                 pWorkItem->Specific.CacheAccess.FunctionCode,
 895                                                 pWorkItem->Specific.CacheAccess.RequestFlags,
 896                                                 pWorkItem->Specific.CacheAccess.IoRuns,
 897                                                 pWorkItem->Specific.CacheAccess.RunCount,
 898                                                 pWorkItem->Specific.CacheAccess.GatherIo);
 899
 900                         //
 901                         // Regardless of the status we we do the complete - there may
 902                         // be IOs in flight
 903                         // Decrement the count - setting the event if we were told
 904                         // to. This may trigger completion.
 905                         //
 906
 907                         AFSCompleteIo( pWorkItem->Specific.CacheAccess.GatherIo, ntStatus );
 908
 909                         freeWorkItem = TRUE;
 910
 911                         break;
 912                     }
 913
 914                     default:
 915
 916                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 917                                       AFS_TRACE_LEVEL_ERROR,
 918                                       "AFSWorkerThread Unknown request type %d\n", pWorkItem->RequestType);
 919
 920                         break;
 921                 }
 922
 923                 if( freeWorkItem)
 924                 {
 925
 926                     ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
 927                 }
 928
 929                 ntStatus = STATUS_SUCCESS;
 930             }
 931         }
 932     } // worker thread loop
 933
 934     ClearFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
 935
 936     // Wake up another IOWorker so they too can exit
 937
 938     KeSetEvent( &pLibraryDevExt->Specific.Library.IOWorkerQueueHasItems,
 939                 0,
 940                 FALSE);
 941
 942     PsTerminateSystemThread( 0);
 943
 944     return;
 945 }
 946
 947 void
 948 AFSPrimaryVolumeWorkerThread( IN PVOID Context)
 949 {
 950
 951     UNREFERENCED_PARAMETER(Context);
 952     NTSTATUS ntStatus = STATUS_SUCCESS;
 953     AFSWorkQueueContext *pPoolContext = (AFSWorkQueueContext *)&AFSGlobalRoot->VolumeWorkerContext;
 954     AFSDeviceExt *pControlDeviceExt = NULL;
 955     AFSDeviceExt *pRDRDeviceExt = NULL;
 956     LARGE_INTEGER DueTime;
 957     LONG TimeOut;
 958     KTIMER Timer;
 959     AFSObjectInfoCB *pCurrentObject = NULL, *pNextObject = NULL, *pCurrentChildObject = NULL;
 960     AFSDirectoryCB *pCurrentDirEntry = NULL, *pNextDirEntry = NULL;
 961     BOOLEAN bReleaseVolumeLock = FALSE;
 962     AFSVolumeCB *pVolumeCB = NULL, *pNextVolume = NULL;
 963     AFSFcb *pFcb = NULL;
 964     LARGE_INTEGER liCurrentTime;
 965     BOOLEAN bVolumeObject = FALSE;
 966     BOOLEAN bFcbBusy = FALSE;
 967     LONG lCount;
 968
 969     pControlDeviceExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
 970
 971     pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
 972
 973     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
 974                   AFS_TRACE_LEVEL_VERBOSE,
 975                   "AFSPrimaryVolumeWorkerThread Initialized\n");
 976
 977     //
 978     // Initialize the timer for the worker thread
 979     //
 980
 981     DueTime.QuadPart = -(5000);
 982
 983     TimeOut = 5000;
 984
 985     KeInitializeTimerEx( &Timer,
 986                          SynchronizationTimer);
 987
 988     KeSetTimerEx( &Timer,
 989                   DueTime,
 990                   TimeOut,
 991                   NULL);
 992
 993     //
 994     // Indicate that we are initialized and ready
 995     //
 996
 997     KeSetEvent( &pPoolContext->WorkerThreadReady,
 998                 0,
 999                 FALSE);
1000
1001     //
1002     // Indicate we are initialized
1003     //
1004
1005     SetFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
1006
1007     while( BooleanFlagOn( pPoolContext->State, AFS_WORKER_PROCESS_REQUESTS))
1008     {
1009
1010         if ( bFcbBusy == FALSE)
1011         {
1012
1013             KeWaitForSingleObject( &Timer,
1014                                    Executive,
1015                                    KernelMode,
1016                                    FALSE,
1017                                    NULL);
1018         }
1019         else
1020         {
1021
1022             bFcbBusy = FALSE;
1023         }
1024
1025         //
1026         // This is the primary volume worker so it will traverse the volume list
1027         // looking for cleanup or volumes requiring private workers
1028         //
1029
1030         AFSAcquireShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
1031                           TRUE);
1032
1033         pVolumeCB = pRDRDeviceExt->Specific.RDR.VolumeListHead;
1034
1035         while( pVolumeCB != NULL)
1036         {
1037
1038             if( pVolumeCB == AFSGlobalRoot ||
1039                 !AFSAcquireExcl( pVolumeCB->VolumeLock,
1040                                  FALSE))
1041             {
1042
1043                 pVolumeCB = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1044
1045                 continue;
1046             }
1047
1048             if( pVolumeCB->ObjectInfoListHead == NULL)
1049             {
1050
1051                 AFSReleaseResource( pVolumeCB->VolumeLock);
1052
1053                 AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1054
1055                 AFSAcquireExcl( pRDRDeviceExt->Specific.RDR.VolumeTree.TreeLock,
1056                                 TRUE);
1057
1058                 AFSAcquireExcl( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
1059                                 TRUE);
1060
1061                 if( !AFSAcquireExcl( pVolumeCB->VolumeLock,
1062                                      FALSE))
1063                 {
1064
1065                     AFSConvertToShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1066
1067                     AFSReleaseResource( pRDRDeviceExt->Specific.RDR.VolumeTree.TreeLock);
1068
1069                     pVolumeCB = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1070
1071                     continue;
1072                 }
1073
1074                 KeQueryTickCount( &liCurrentTime);
1075
1076                 pNextVolume = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1077
1078                 AFSAcquireShared( &pVolumeCB->ObjectInformation.NonPagedInfo->ObjectInfoLock,
1079                                   TRUE);
1080
1081                 if( pVolumeCB->ObjectInfoListHead == NULL &&
1082                     pVolumeCB->DirectoryCB->DirOpenReferenceCount <= 0 &&
1083                     pVolumeCB->VolumeReferenceCount == 1 &&
1084                     ( pVolumeCB->RootFcb == NULL ||
1085                       pVolumeCB->RootFcb->OpenReferenceCount == 0) &&
1086                     pVolumeCB->ObjectInformation.ObjectReferenceCount <= 0)
1087                 {
1088
1089                     if( pVolumeCB->RootFcb != NULL)
1090                     {
1091
1092                         AFSRemoveRootFcb( pVolumeCB->RootFcb);
1093                     }
1094
1095                     AFSReleaseResource( &pVolumeCB->ObjectInformation.NonPagedInfo->ObjectInfoLock);
1096
1097                     AFSRemoveVolume( pVolumeCB);
1098                 }
1099                 else
1100                 {
1101
1102                     AFSReleaseResource( &pVolumeCB->ObjectInformation.NonPagedInfo->ObjectInfoLock);
1103
1104                     AFSReleaseResource( pVolumeCB->VolumeLock);
1105                 }
1106
1107                 AFSConvertToShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1108
1109                 AFSReleaseResource( pRDRDeviceExt->Specific.RDR.VolumeTree.TreeLock);
1110
1111                 pVolumeCB = pNextVolume;
1112
1113                 continue;
1114             }
1115
1116             //
1117             // Don't need this lock anymore now that we have a volume cb to work with
1118             //
1119
1120             AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1121
1122             //
1123             // For now we only need the volume lock shared
1124             //
1125
1126             AFSConvertToShared( pVolumeCB->VolumeLock);
1127
1128             if( AFSAcquireShared( pVolumeCB->ObjectInfoTree.TreeLock,
1129                                   FALSE))
1130             {
1131
1132                 pCurrentObject = pVolumeCB->ObjectInfoListHead;
1133
1134                 pNextObject = NULL;
1135
1136                 bReleaseVolumeLock = TRUE;
1137
1138                 while( pCurrentObject != NULL)
1139                 {
1140
1141                     if( pCurrentObject != &pVolumeCB->ObjectInformation)
1142                     {
1143
1144                         pNextObject = (AFSObjectInfoCB *)pCurrentObject->ListEntry.fLink;
1145
1146                         if( pNextObject == NULL &&
1147                             pVolumeCB != AFSGlobalRoot)  // Don't free up the root of the global
1148                         {
1149
1150                             pNextObject = &pVolumeCB->ObjectInformation;
1151                         }
1152
1153                         bVolumeObject = FALSE;
1154                     }
1155                     else
1156                     {
1157
1158                         pNextObject = NULL;
1159
1160                         bVolumeObject = TRUE;
1161                     }
1162
1163                     if( pCurrentObject->FileType == AFS_FILE_TYPE_DIRECTORY &&
1164                         !BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))  // If we are in shutdown mode skip directories
1165                     {
1166
1167                         //
1168                         // If this object is deleted then remove it from the parent, if we can
1169                         //
1170
1171                         if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DELETED) &&
1172                             pCurrentObject->ObjectReferenceCount <= 0 &&
1173                             ( pCurrentObject->Fcb == NULL ||
1174                               pCurrentObject->Fcb->OpenReferenceCount == 0) &&
1175                             pCurrentObject->Specific.Directory.DirectoryNodeListHead == NULL &&
1176                             pCurrentObject->Specific.Directory.ChildOpenReferenceCount == 0)
1177                         {
1178
1179                             AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1180
1181                             //
1182                             // Dropping the TreeLock permits the
1183                             // pCurrentObject->ObjectReferenceCount to change
1184                             //
1185
1186                             if( AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1187                                                 FALSE))
1188                             {
1189
1190                                 AFSAcquireExcl( &pCurrentObject->NonPagedInfo->ObjectInfoLock,
1191                                                 TRUE);
1192
1193                                 if ( pCurrentObject->ObjectReferenceCount <= 0)
1194                                 {
1195
1196                                     AFSRemoveFcb( &pCurrentObject->Fcb);
1197
1198                                     if( pCurrentObject->Specific.Directory.PIOCtlDirectoryCB != NULL)
1199                                     {
1200
1201                                         AFSAcquireExcl( &pCurrentObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->NonPagedInfo->ObjectInfoLock,
1202                                                         TRUE);
1203
1204                                         AFSRemoveFcb( &pCurrentObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb);
1205
1206                                         AFSReleaseResource( &pCurrentObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->NonPagedInfo->ObjectInfoLock);
1207
1208                                         AFSDeleteObjectInfo( pCurrentObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation);
1209
1210                                         ExDeleteResourceLite( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged->Lock);
1211
1212                                         AFSExFreePoolWithTag( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged, AFS_DIR_ENTRY_NP_TAG);
1213
1214                                         AFSExFreePoolWithTag( pCurrentObject->Specific.Directory.PIOCtlDirectoryCB, AFS_DIR_ENTRY_TAG);
1215                                     }
1216
1217                                     AFSReleaseResource( &pCurrentObject->NonPagedInfo->ObjectInfoLock);
1218
1219                                     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1220                                                   AFS_TRACE_LEVEL_VERBOSE,
1221                                                   "AFSPrimaryVolumeWorkerThread Deleting deleted object %08lX\n",
1222                                                   pCurrentObject);
1223
1224                                     AFSDeleteObjectInfo( pCurrentObject);
1225                                 }
1226                                 else
1227                                 {
1228
1229                                     AFSReleaseResource( &pCurrentObject->NonPagedInfo->ObjectInfoLock);
1230                                 }
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->DirOpenReferenceCount > 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->DirOpenReferenceCount > 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                                     pFcb = NULL;
1381
1382                                     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING | AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1383                                                   AFS_TRACE_LEVEL_VERBOSE,
1384                                                   "AFSPrimaryVolumeWorkerThread Deleting DE %wZ Object %08lX\n",
1385                                                   &pCurrentDirEntry->NameInformation.FileName,
1386                                                   pCurrentChildObject);
1387
1388                                     AFSDeleteDirEntry( pCurrentObject,
1389                                                        pCurrentDirEntry);
1390
1391
1392                                     //
1393                                     // Acquire ObjectInfoLock shared here so as not to deadlock
1394                                     // with an invalidation call from the service during AFSCleanupFcb
1395                                     //
1396
1397                                     lCount = AFSObjectInfoIncrement( pCurrentChildObject);
1398
1399                                     if( lCount == 1 &&
1400                                         pCurrentChildObject->Fcb != NULL &&
1401                                         pCurrentChildObject->FileType == AFS_FILE_TYPE_FILE)
1402                                     {
1403
1404                                         //
1405                                         // We must not hold pVolumeCB->ObjectInfoTree.TreeLock exclusive
1406                                         // across an AFSCleanupFcb call since it can deadlock with an
1407                                         // invalidation call from the service.
1408                                         //
1409
1410                                         AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1411
1412                                         //
1413                                         // Cannot hold a TreeLock across an AFSCleanupFcb call
1414                                         // as it can deadlock with an invalidation ioctl initiated
1415                                         // from the service.
1416                                         //
1417                                         // Dropping the TreeLock permits the
1418                                         // pCurrentObject->ObjectReferenceCount to change
1419                                         //
1420
1421                                         ntStatus = AFSCleanupFcb( pCurrentChildObject->Fcb,
1422                                                                   TRUE);
1423
1424                                         if ( ntStatus == STATUS_RETRY)
1425                                         {
1426
1427                                             bFcbBusy = TRUE;
1428                                         }
1429
1430                                         AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1431                                                         TRUE);
1432                                     }
1433
1434                                     lCount = AFSObjectInfoDecrement( pCurrentChildObject);
1435
1436                                     AFSAcquireExcl( &pCurrentChildObject->NonPagedInfo->ObjectInfoLock,
1437                                                     TRUE);
1438
1439                                     if( pCurrentChildObject->ObjectReferenceCount <= 0)
1440                                     {
1441
1442                                         AFSRemoveFcb( &pCurrentChildObject->Fcb);
1443
1444                                         if( pCurrentChildObject->FileType == AFS_FILE_TYPE_DIRECTORY &&
1445                                             pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB != NULL)
1446                                         {
1447
1448                                             AFSAcquireExcl( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->NonPagedInfo->ObjectInfoLock,
1449                                                             TRUE);
1450
1451                                             AFSRemoveFcb( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb);
1452
1453                                             AFSReleaseResource( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->NonPagedInfo->ObjectInfoLock);
1454
1455                                             AFSDeleteObjectInfo( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->ObjectInformation);
1456
1457                                             ExDeleteResourceLite( &pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged->Lock);
1458
1459                                             AFSExFreePoolWithTag( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB->NonPaged, AFS_DIR_ENTRY_NP_TAG);
1460
1461                                             AFSExFreePoolWithTag( pCurrentChildObject->Specific.Directory.PIOCtlDirectoryCB, AFS_DIR_ENTRY_TAG);
1462                                         }
1463
1464                                         AFSReleaseResource( &pCurrentChildObject->NonPagedInfo->ObjectInfoLock);
1465
1466                                         AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1467                                                       AFS_TRACE_LEVEL_VERBOSE,
1468                                                       "AFSPrimaryVolumeWorkerThread Deleting object %08lX\n",
1469                                                       pCurrentChildObject);
1470
1471                                         AFSDeleteObjectInfo( pCurrentChildObject);
1472                                     }
1473                                     else
1474                                     {
1475
1476                                         AFSReleaseResource( &pCurrentChildObject->NonPagedInfo->ObjectInfoLock);
1477                                     }
1478
1479                                     pCurrentDirEntry = pNextDirEntry;
1480
1481                                 }
1482
1483                                 pCurrentObject->Specific.Directory.DirectoryNodeListHead = NULL;
1484
1485                                 pCurrentObject->Specific.Directory.DirectoryNodeListTail = NULL;
1486
1487                                 pCurrentObject->Specific.Directory.ShortNameTree = NULL;
1488
1489                                 pCurrentObject->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead = NULL;
1490
1491                                 pCurrentObject->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead = NULL;
1492
1493                                 pCurrentObject->Specific.Directory.DirectoryNodeCount = 0;
1494
1495                                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
1496                                               AFS_TRACE_LEVEL_VERBOSE,
1497                                               "AFSPrimaryVolumeWorkerThread Reset count to 0 on parent FID %08lX-%08lX-%08lX-%08lX\n",
1498                                               pCurrentObject->FileId.Cell,
1499                                               pCurrentObject->FileId.Volume,
1500                                               pCurrentObject->FileId.Vnode,
1501                                               pCurrentObject->FileId.Unique);
1502
1503                                 //
1504                                 // Clear our enumerated flag on this object so we retrieve info again on next access
1505                                 //
1506
1507                                 ClearFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED);
1508
1509                                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1510
1511                                 AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1512                             }
1513                             else
1514                             {
1515
1516                                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1517
1518                                 bReleaseVolumeLock = FALSE;
1519
1520                                 break;
1521                             }
1522                         }
1523                         else
1524                         {
1525
1526                             //
1527                             // Try to grab the volume lock again ... no problem if we don't
1528                             //
1529
1530                             if( !AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1531                                                  FALSE))
1532                             {
1533
1534                                 bReleaseVolumeLock = FALSE;
1535
1536                                 break;
1537                             }
1538                         }
1539
1540                         if( pCurrentObject != &pVolumeCB->ObjectInformation)
1541                         {
1542
1543                             pCurrentObject = (AFSObjectInfoCB *)pCurrentObject->ListEntry.fLink;
1544
1545                             if( pCurrentObject == NULL &&
1546                                 pVolumeCB != AFSGlobalRoot)
1547                             {
1548
1549                                 pCurrentObject = &pVolumeCB->ObjectInformation;
1550                             }
1551                         }
1552                         else
1553                         {
1554
1555                             pCurrentObject = NULL;
1556                         }
1557
1558                         continue;
1559                     }
1560                     else if( pCurrentObject->FileType == AFS_FILE_TYPE_FILE)
1561                     {
1562
1563                         lCount = AFSObjectInfoIncrement( pCurrentObject);
1564
1565                         AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1566
1567                         if( pCurrentObject->Fcb != NULL)
1568                         {
1569
1570                             //
1571                             // Dropping the TreeLock permits the
1572                             // pCurrentObject->ObjectReferenceCount to change
1573                             //
1574
1575                             ntStatus = AFSCleanupFcb( pCurrentObject->Fcb,
1576                                                       FALSE);
1577
1578                             if ( ntStatus == STATUS_RETRY)
1579                             {
1580
1581                                 bFcbBusy = TRUE;
1582                             }
1583                         }
1584
1585                         lCount = AFSObjectInfoDecrement( pCurrentObject);
1586
1587                         if( !AFSAcquireExcl( pVolumeCB->ObjectInfoTree.TreeLock,
1588                                              FALSE))
1589                         {
1590
1591                             bReleaseVolumeLock = FALSE;
1592
1593                             break;
1594                         }
1595
1596                         AFSAcquireExcl( &pCurrentObject->NonPagedInfo->ObjectInfoLock,
1597                                         TRUE);
1598
1599                         if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DELETED) &&
1600                             pCurrentObject->ObjectReferenceCount <= 0)
1601                         {
1602
1603                             AFSRemoveFcb( &pCurrentObject->Fcb);
1604
1605                             AFSReleaseResource( &pCurrentObject->NonPagedInfo->ObjectInfoLock);
1606
1607                             AFSDeleteObjectInfo( pCurrentObject);
1608                         }
1609                         else
1610                         {
1611
1612                             AFSReleaseResource( &pCurrentObject->NonPagedInfo->ObjectInfoLock);
1613                         }
1614
1615                         AFSConvertToShared( pVolumeCB->ObjectInfoTree.TreeLock);
1616
1617                         pCurrentObject = pNextObject;
1618
1619                         continue;
1620                     }
1621
1622                     pCurrentObject = pNextObject;
1623                 }
1624
1625                 if( bReleaseVolumeLock)
1626                 {
1627
1628                     AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
1629                 }
1630             }
1631
1632             //
1633             // Next volume cb
1634             //
1635
1636             AFSReleaseResource( pVolumeCB->VolumeLock);
1637
1638             AFSAcquireShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
1639                               TRUE);
1640
1641             pVolumeCB = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
1642         }
1643
1644         AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
1645
1646     } // worker thread loop
1647
1648     KeCancelTimer( &Timer);
1649
1650     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1651                   AFS_TRACE_LEVEL_VERBOSE,
1652                   "AFSPrimaryVolumeWorkerThread Exiting\n");
1653
1654     lCount = InterlockedDecrement( &pControlDeviceExt->Specific.Control.VolumeWorkerThreadCount);
1655
1656     if( lCount == 0)
1657     {
1658
1659         KeSetEvent( &pControlDeviceExt->Specific.Control.VolumeWorkerCloseEvent,
1660                     0,
1661                     FALSE);
1662     }
1663
1664     PsTerminateSystemThread( 0);
1665
1666     return;
1667 }
1668
1669 void
1670 AFSVolumeWorkerThread( IN PVOID Context)
1671 {
1672
1673     NTSTATUS ntStatus = STATUS_SUCCESS;
1674     AFSVolumeCB *pVolumeCB = (AFSVolumeCB * )Context;
1675     AFSWorkQueueContext *pPoolContext = (AFSWorkQueueContext *)&pVolumeCB->VolumeWorkerContext;
1676     AFSDeviceExt *pControlDeviceExt = NULL;
1677     AFSDeviceExt *pRDRDeviceExt = NULL;
1678     LARGE_INTEGER DueTime;
1679     LONG TimeOut;
1680     KTIMER Timer;
1681     LONG lCount;
1682
1683     pControlDeviceExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
1684
1685     pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
1686
1687     //
1688     // Initialize the timer for the worker thread
1689     //
1690
1691     DueTime.QuadPart = -(5000);
1692
1693     TimeOut = 5000;
1694
1695     KeInitializeTimerEx( &Timer,
1696                          SynchronizationTimer);
1697
1698     KeSetTimerEx( &Timer,
1699                   DueTime,
1700                   TimeOut,
1701                   NULL);
1702
1703     //
1704     // Indicate that we are initialized and ready
1705     //
1706
1707     KeSetEvent( &pPoolContext->WorkerThreadReady,
1708                 0,
1709                 FALSE);
1710
1711     //
1712     // Indicate we are initialized
1713     //
1714
1715     SetFlag( pPoolContext->State, AFS_WORKER_INITIALIZED);
1716
1717     while( BooleanFlagOn( pPoolContext->State, AFS_WORKER_PROCESS_REQUESTS))
1718     {
1719
1720         ntStatus = KeWaitForSingleObject( &Timer,
1721                                           Executive,
1722                                           KernelMode,
1723                                           FALSE,
1724                                           NULL);
1725
1726         if( !NT_SUCCESS( ntStatus))
1727         {
1728
1729             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1730                           AFS_TRACE_LEVEL_ERROR,
1731                           "AFSVolumeWorkerThread Wait for queue items failed Status %08lX\n", ntStatus);
1732         }
1733         else
1734         {
1735
1736             //
1737             // If we are in shutdown mode and the dirty flag is clear then get out now
1738             //
1739
1740             if( BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))
1741             {
1742
1743                 break;
1744             }
1745         }
1746     } // worker thread loop
1747
1748     KeCancelTimer( &Timer);
1749
1750     lCount = InterlockedDecrement( &pControlDeviceExt->Specific.Control.VolumeWorkerThreadCount);
1751
1752     if( lCount == 0)
1753     {
1754
1755         KeSetEvent( &pControlDeviceExt->Specific.Control.VolumeWorkerCloseEvent,
1756                     0,
1757                     FALSE);
1758     }
1759
1760     PsTerminateSystemThread( 0);
1761
1762     return;
1763 }
1764
1765 NTSTATUS
1766 AFSInsertWorkitem( IN AFSWorkItem *WorkItem)
1767 {
1768
1769     NTSTATUS ntStatus = STATUS_SUCCESS;
1770     AFSDeviceExt *pDevExt = NULL;
1771     LONG lCount;
1772
1773     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1774
1775     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1776                   AFS_TRACE_LEVEL_VERBOSE,
1777                   "AFSInsertWorkitem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1778                   &pDevExt->Specific.Library.QueueLock,
1779                   PsGetCurrentThread());
1780
1781     AFSAcquireExcl( &pDevExt->Specific.Library.QueueLock,
1782                     TRUE);
1783
1784     lCount = InterlockedIncrement( &pDevExt->Specific.Library.QueueItemCount);
1785
1786     AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1787                   AFS_TRACE_LEVEL_VERBOSE,
1788                   "AFSInsertWorkitem Inserting work item %08lX Count %08lX\n",
1789                   WorkItem,
1790                   lCount);
1791
1792     if( pDevExt->Specific.Library.QueueTail != NULL) // queue already has nodes
1793     {
1794
1795         pDevExt->Specific.Library.QueueTail->next = WorkItem;
1796     }
1797     else // first node
1798     {
1799
1800         pDevExt->Specific.Library.QueueHead = WorkItem;
1801     }
1802
1803     WorkItem->next = NULL;
1804     pDevExt->Specific.Library.QueueTail = WorkItem;
1805
1806     // indicate that the queue has nodes
1807     KeSetEvent( &(pDevExt->Specific.Library.WorkerQueueHasItems),
1808                 0,
1809                 FALSE);
1810
1811     AFSReleaseResource( &pDevExt->Specific.Library.QueueLock);
1812
1813     return ntStatus;
1814 }
1815
1816 NTSTATUS
1817 AFSInsertIOWorkitem( IN AFSWorkItem *WorkItem)
1818 {
1819
1820     NTSTATUS ntStatus = STATUS_SUCCESS;
1821     AFSDeviceExt *pDevExt = NULL;
1822     LONG lCount;
1823
1824     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1825
1826     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1827                   AFS_TRACE_LEVEL_VERBOSE,
1828                   "AFSInsertIOWorkitem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1829                   &pDevExt->Specific.Library.IOQueueLock,
1830                   PsGetCurrentThread());
1831
1832     AFSAcquireExcl( &pDevExt->Specific.Library.IOQueueLock,
1833                     TRUE);
1834
1835     lCount = InterlockedIncrement( &pDevExt->Specific.Library.IOQueueItemCount);
1836
1837     AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1838                   AFS_TRACE_LEVEL_VERBOSE,
1839                   "AFSInsertWorkitem Inserting IO work item %08lX Count %08lX\n",
1840                   WorkItem,
1841                   lCount);
1842
1843     if( pDevExt->Specific.Library.IOQueueTail != NULL) // queue already has nodes
1844     {
1845
1846         pDevExt->Specific.Library.IOQueueTail->next = WorkItem;
1847     }
1848     else // first node
1849     {
1850
1851         pDevExt->Specific.Library.IOQueueHead = WorkItem;
1852     }
1853
1854     WorkItem->next = NULL;
1855     pDevExt->Specific.Library.IOQueueTail = WorkItem;
1856
1857     // indicate that the queue has nodes
1858     KeSetEvent( &(pDevExt->Specific.Library.IOWorkerQueueHasItems),
1859                 0,
1860                 FALSE);
1861
1862     AFSReleaseResource( &pDevExt->Specific.Library.IOQueueLock);
1863
1864     return ntStatus;
1865 }
1866
1867 NTSTATUS
1868 AFSInsertWorkitemAtHead( IN AFSWorkItem *WorkItem)
1869 {
1870
1871     NTSTATUS ntStatus = STATUS_SUCCESS;
1872     AFSDeviceExt *pDevExt = NULL;
1873     LONG lCount;
1874
1875     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1876
1877     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1878                   AFS_TRACE_LEVEL_VERBOSE,
1879                   "AFSInsertWorkitemAtHead Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1880                   &pDevExt->Specific.Library.QueueLock,
1881                   PsGetCurrentThread());
1882
1883     AFSAcquireExcl( &pDevExt->Specific.Library.QueueLock,
1884                     TRUE);
1885
1886     WorkItem->next = pDevExt->Specific.Library.QueueHead;
1887
1888     pDevExt->Specific.Library.QueueHead = WorkItem;
1889
1890     lCount = InterlockedIncrement( &pDevExt->Specific.Library.QueueItemCount);
1891
1892     AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1893                   AFS_TRACE_LEVEL_VERBOSE,
1894                   "AFSInsertWorkitemAtHead Inserting work item %08lX Count %08lX\n",
1895                   WorkItem,
1896                   lCount);
1897
1898     //
1899     // indicate that the queue has nodes
1900     //
1901
1902     KeSetEvent( &(pDevExt->Specific.Library.WorkerQueueHasItems),
1903                 0,
1904                 FALSE);
1905
1906     AFSReleaseResource( &pDevExt->Specific.Library.QueueLock);
1907
1908     return ntStatus;
1909 }
1910
1911 AFSWorkItem *
1912 AFSRemoveWorkItem()
1913 {
1914
1915     AFSWorkItem        *pWorkItem = NULL;
1916     AFSDeviceExt *pDevExt = NULL;
1917     LONG lCount;
1918
1919     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1920
1921     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1922                   AFS_TRACE_LEVEL_VERBOSE,
1923                   "AFSRemoveWorkItem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1924                   &pDevExt->Specific.Library.QueueLock,
1925                   PsGetCurrentThread());
1926
1927     AFSAcquireExcl( &pDevExt->Specific.Library.QueueLock,
1928                     TRUE);
1929
1930     if( pDevExt->Specific.Library.QueueHead != NULL) // queue has nodes
1931     {
1932
1933         pWorkItem = pDevExt->Specific.Library.QueueHead;
1934
1935         lCount = InterlockedDecrement( &pDevExt->Specific.Library.QueueItemCount);
1936
1937         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1938                       AFS_TRACE_LEVEL_VERBOSE,
1939                       "AFSRemoveWorkItem Removing work item %08lX Count %08lX Thread %08lX\n",
1940                       pWorkItem,
1941                       lCount,
1942                       PsGetCurrentThreadId());
1943
1944         pDevExt->Specific.Library.QueueHead = pDevExt->Specific.Library.QueueHead->next;
1945
1946         if( pDevExt->Specific.Library.QueueHead == NULL) // if queue just became empty
1947         {
1948
1949             pDevExt->Specific.Library.QueueTail = NULL;
1950         }
1951         else
1952         {
1953
1954             //
1955             // Wake up another worker
1956             //
1957
1958             KeSetEvent( &(pDevExt->Specific.Library.WorkerQueueHasItems),
1959                         0,
1960                         FALSE);
1961         }
1962     }
1963
1964     AFSReleaseResource( &pDevExt->Specific.Library.QueueLock);
1965
1966     return pWorkItem;
1967 }
1968
1969 AFSWorkItem *
1970 AFSRemoveIOWorkItem()
1971 {
1972
1973     AFSWorkItem        *pWorkItem = NULL;
1974     AFSDeviceExt *pDevExt = NULL;
1975     LONG lCount;
1976
1977     pDevExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
1978
1979     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1980                   AFS_TRACE_LEVEL_VERBOSE,
1981                   "AFSRemoveIOWorkItem Acquiring Control QueueLock lock %08lX EXCL %08lX\n",
1982                   &pDevExt->Specific.Library.IOQueueLock,
1983                   PsGetCurrentThread());
1984
1985     AFSAcquireExcl( &pDevExt->Specific.Library.IOQueueLock,
1986                     TRUE);
1987
1988     if( pDevExt->Specific.Library.IOQueueHead != NULL) // queue has nodes
1989     {
1990
1991         pWorkItem = pDevExt->Specific.Library.IOQueueHead;
1992
1993         lCount = InterlockedDecrement( &pDevExt->Specific.Library.IOQueueItemCount);
1994
1995         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
1996                       AFS_TRACE_LEVEL_VERBOSE,
1997                       "AFSRemoveWorkItem Removing work item %08lX Count %08lX Thread %08lX\n",
1998                       pWorkItem,
1999                       lCount,
2000                       PsGetCurrentThreadId());
2001
2002         pDevExt->Specific.Library.IOQueueHead = pDevExt->Specific.Library.IOQueueHead->next;
2003
2004         if( pDevExt->Specific.Library.IOQueueHead == NULL) // if queue just became empty
2005         {
2006
2007             pDevExt->Specific.Library.IOQueueTail = NULL;
2008         }
2009         else
2010         {
2011
2012             //
2013             // Wake up another worker
2014             //
2015
2016             KeSetEvent( &(pDevExt->Specific.Library.IOWorkerQueueHasItems),
2017                         0,
2018                         FALSE);
2019         }
2020     }
2021
2022     AFSReleaseResource( &pDevExt->Specific.Library.IOQueueLock);
2023
2024     return pWorkItem;
2025 }
2026
2027 NTSTATUS
2028 AFSQueueWorkerRequest( IN AFSWorkItem *WorkItem)
2029 {
2030
2031     NTSTATUS ntStatus = STATUS_SUCCESS;
2032     BOOLEAN bWait = BooleanFlagOn( WorkItem->RequestFlags, AFS_SYNCHRONOUS_REQUEST);
2033
2034     //
2035     // Submit the work item to the worker
2036     //
2037
2038     ntStatus = AFSInsertWorkitem( WorkItem);
2039
2040     if( bWait)
2041     {
2042
2043         //
2044         // Sync request so block on the work item event
2045         //
2046
2047         ntStatus = KeWaitForSingleObject( &WorkItem->Event,
2048                                           Executive,
2049                                           KernelMode,
2050                                           FALSE,
2051                                           NULL);
2052     }
2053
2054     return ntStatus;
2055 }
2056
2057 NTSTATUS
2058 AFSQueueIOWorkerRequest( IN AFSWorkItem *WorkItem)
2059 {
2060
2061     NTSTATUS ntStatus = STATUS_SUCCESS;
2062     BOOLEAN bWait = BooleanFlagOn( WorkItem->RequestFlags, AFS_SYNCHRONOUS_REQUEST);
2063
2064     //
2065     // Submit the work item to the worker
2066     //
2067
2068     ntStatus = AFSInsertIOWorkitem( WorkItem);
2069
2070     if( bWait)
2071     {
2072
2073         //
2074         // Sync request so block on the work item event
2075         //
2076
2077         ntStatus = KeWaitForSingleObject( &WorkItem->Event,
2078                                           Executive,
2079                                           KernelMode,
2080                                           FALSE,
2081                                           NULL);
2082     }
2083
2084     return ntStatus;
2085 }
2086
2087 NTSTATUS
2088 AFSQueueWorkerRequestAtHead( IN AFSWorkItem *WorkItem)
2089 {
2090
2091     NTSTATUS ntStatus = STATUS_SUCCESS;
2092     BOOLEAN bWait = BooleanFlagOn( WorkItem->RequestFlags, AFS_SYNCHRONOUS_REQUEST);
2093
2094     //
2095     // Submit the work item to the worker
2096     //
2097
2098     ntStatus = AFSInsertWorkitemAtHead( WorkItem);
2099
2100     if( bWait)
2101     {
2102
2103         //
2104         // Sync request so block on the work item event
2105         //
2106
2107         ntStatus = KeWaitForSingleObject( &WorkItem->Event,
2108                                           Executive,
2109                                           KernelMode,
2110                                           FALSE,
2111                                           NULL);
2112     }
2113
2114     return ntStatus;
2115 }
2116
2117 NTSTATUS
2118 AFSQueueFlushExtents( IN AFSFcb *Fcb,
2119                       IN GUID *AuthGroup)
2120 {
2121
2122     NTSTATUS ntStatus = STATUS_SUCCESS;
2123     AFSDeviceExt *pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2124     AFSWorkItem *pWorkItem = NULL;
2125     LONG lCount;
2126
2127     __try
2128     {
2129
2130         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2131                       AFS_TRACE_LEVEL_VERBOSE,
2132                       "AFSQueueFlushExtents Queuing request for FID %08lX-%08lX-%08lX-%08lX\n",
2133                       Fcb->ObjectInformation->FileId.Cell,
2134                       Fcb->ObjectInformation->FileId.Volume,
2135                       Fcb->ObjectInformation->FileId.Vnode,
2136                       Fcb->ObjectInformation->FileId.Unique);
2137
2138         //
2139         // Increment our flush count here just to keep the number of items in the
2140         // queue down. We'll decrement it just below.
2141         //
2142
2143         lCount = InterlockedIncrement( &Fcb->Specific.File.QueuedFlushCount);
2144
2145         if( lCount > 3)
2146         {
2147
2148             AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2149                           AFS_TRACE_LEVEL_VERBOSE,
2150                           "AFSQueueFlushExtents Max queued items for FID %08lX-%08lX-%08lX-%08lX\n",
2151                           Fcb->ObjectInformation->FileId.Cell,
2152                           Fcb->ObjectInformation->FileId.Volume,
2153                           Fcb->ObjectInformation->FileId.Vnode,
2154                           Fcb->ObjectInformation->FileId.Unique);
2155
2156             try_return( ntStatus);
2157         }
2158
2159         if( BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))
2160         {
2161
2162             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2163                           AFS_TRACE_LEVEL_ERROR,
2164                           "AFSQueueFlushExtents Failing request, in shutdown\n");
2165
2166             try_return( ntStatus = STATUS_TOO_LATE);
2167         }
2168
2169         //
2170         // Allocate our request structure and send it to the worker
2171         //
2172
2173         pWorkItem = (AFSWorkItem *)AFSLibExAllocatePoolWithTag( NonPagedPool,
2174                                                                 sizeof( AFSWorkItem),
2175                                                                 AFS_WORK_ITEM_TAG);
2176
2177         if( pWorkItem == NULL)
2178         {
2179
2180             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2181                           AFS_TRACE_LEVEL_ERROR,
2182                           "AFSQueueFlushExtents Failed to allocate work item\n");
2183
2184             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2185         }
2186
2187         RtlZeroMemory( pWorkItem,
2188                        sizeof( AFSWorkItem));
2189
2190         pWorkItem->Size = sizeof( AFSWorkItem);
2191
2192         pWorkItem->ProcessID = (ULONGLONG)PsGetCurrentProcessId();
2193
2194         pWorkItem->RequestType = AFS_WORK_FLUSH_FCB;
2195
2196         if ( AuthGroup == NULL)
2197         {
2198
2199             RtlZeroMemory( &pWorkItem->AuthGroup,
2200                            sizeof( GUID));
2201
2202             ntStatus = AFSRetrieveValidAuthGroup( Fcb,
2203                                                   NULL,
2204                                                   TRUE,
2205                                                   &pWorkItem->AuthGroup);
2206         }
2207         else
2208         {
2209             RtlCopyMemory( &pWorkItem->AuthGroup,
2210                            AuthGroup,
2211                            sizeof( GUID));
2212         }
2213
2214         pWorkItem->Specific.Fcb.Fcb = Fcb;
2215
2216         lCount = InterlockedIncrement( &Fcb->OpenReferenceCount);
2217
2218         AFSDbgLogMsg( AFS_SUBSYSTEM_FCB_REF_COUNTING,
2219                       AFS_TRACE_LEVEL_VERBOSE,
2220                       "AFSQueueFlushExtents Increment count on Fcb %08lX Cnt %d\n",
2221                       Fcb,
2222                       lCount);
2223
2224         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2225                       AFS_TRACE_LEVEL_VERBOSE,
2226                       "AFSQueueFlushExtents Workitem %08lX for FID %08lX-%08lX-%08lX-%08lX\n",
2227                       pWorkItem,
2228                       Fcb->ObjectInformation->FileId.Cell,
2229                       Fcb->ObjectInformation->FileId.Volume,
2230                       Fcb->ObjectInformation->FileId.Vnode,
2231                       Fcb->ObjectInformation->FileId.Unique);
2232
2233         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2234
2235 try_exit:
2236
2237         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2238                       AFS_TRACE_LEVEL_VERBOSE,
2239                       "AFSQueueFlushExtents Request complete Status %08lX FID %08lX-%08lX-%08lX-%08lX\n",
2240                       Fcb->ObjectInformation->FileId.Cell,
2241                       Fcb->ObjectInformation->FileId.Volume,
2242                       Fcb->ObjectInformation->FileId.Vnode,
2243                       Fcb->ObjectInformation->FileId.Unique,
2244                       ntStatus);
2245
2246         //
2247         // Remove the count we added above
2248         //
2249
2250         lCount = InterlockedDecrement( &Fcb->Specific.File.QueuedFlushCount);
2251
2252         ASSERT( lCount >= 0);
2253
2254         if( lCount == 0)
2255         {
2256
2257             KeSetEvent( &Fcb->NPFcb->Specific.File.QueuedFlushEvent,
2258                         0,
2259                         FALSE);
2260         }
2261
2262         if( !NT_SUCCESS( ntStatus))
2263         {
2264
2265             if( pWorkItem != NULL)
2266             {
2267
2268                 lCount = InterlockedDecrement( &Fcb->OpenReferenceCount);
2269
2270                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2271             }
2272
2273             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2274                           AFS_TRACE_LEVEL_ERROR,
2275                           "AFSQueueFlushExtents Failed to queue request Status %08lX\n", ntStatus);
2276         }
2277     }
2278     __except( AFSExceptionFilter( __FUNCTION__, GetExceptionCode(), GetExceptionInformation()) )
2279     {
2280
2281         AFSDbgLogMsg( 0,
2282                       0,
2283                       "EXCEPTION - AFSQueueFlushExtents\n");
2284
2285         AFSDumpTraceFilesFnc();
2286     }
2287
2288     return ntStatus;
2289 }
2290
2291 NTSTATUS
2292 AFSQueueGlobalRootEnumeration()
2293 {
2294
2295     NTSTATUS ntStatus = STATUS_SUCCESS;
2296     AFSWorkItem *pWorkItem = NULL;
2297
2298     __try
2299     {
2300
2301         pWorkItem = (AFSWorkItem *) AFSLibExAllocatePoolWithTag( NonPagedPool,
2302                                                                  sizeof(AFSWorkItem),
2303                                                                  AFS_WORK_ITEM_TAG);
2304         if (NULL == pWorkItem)
2305         {
2306
2307             AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2308                           AFS_TRACE_LEVEL_ERROR,
2309                           "AFSQueueGlobalRootEnumeration Failed to allocate work item\n");
2310
2311             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES );
2312         }
2313
2314         RtlZeroMemory( pWorkItem,
2315                        sizeof(AFSWorkItem));
2316
2317         pWorkItem->Size = sizeof( AFSWorkItem);
2318
2319         pWorkItem->RequestType = AFS_WORK_ENUMERATE_GLOBAL_ROOT;
2320
2321         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2322                       AFS_TRACE_LEVEL_VERBOSE,
2323                       "AFSQueueGlobalRootEnumeration Workitem %08lX\n",
2324                       pWorkItem);
2325
2326         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2327
2328 try_exit:
2329
2330         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2331                       AFS_TRACE_LEVEL_VERBOSE,
2332                       "AFSQueueGlobalRootEnumeration Request complete Status %08lX\n",
2333                       ntStatus);
2334
2335         if( !NT_SUCCESS( ntStatus))
2336         {
2337
2338             if( pWorkItem != NULL)
2339             {
2340
2341                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2342             }
2343
2344             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2345                           AFS_TRACE_LEVEL_ERROR,
2346                           "AFSQueueGlobalRootEnumeration Failed to queue request Status %08lX\n",
2347                           ntStatus);
2348         }
2349     }
2350     __except( AFSExceptionFilter( __FUNCTION__, GetExceptionCode(), GetExceptionInformation()) )
2351     {
2352
2353         AFSDbgLogMsg( 0,
2354                       0,
2355                       "EXCEPTION - AFSQueueGlobalRootEnumeration\n");
2356
2357         AFSDumpTraceFilesFnc();
2358     }
2359
2360     return ntStatus;
2361 }
2362
2363 NTSTATUS
2364 AFSQueueStartIos( IN PFILE_OBJECT CacheFileObject,
2365                   IN UCHAR FunctionCode,
2366                   IN ULONG RequestFlags,
2367                   IN AFSIoRun *IoRuns,
2368                   IN ULONG RunCount,
2369                   IN AFSGatherIo *GatherIo)
2370 {
2371
2372     NTSTATUS ntStatus = STATUS_SUCCESS;
2373     AFSDeviceExt *pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2374     AFSWorkItem *pWorkItem = NULL;
2375
2376     __try
2377     {
2378
2379         if( BooleanFlagOn( pRDRDeviceExt->DeviceFlags, AFS_DEVICE_FLAG_REDIRECTOR_SHUTDOWN))
2380         {
2381
2382             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2383                           AFS_TRACE_LEVEL_ERROR,
2384                           "AFSQueueStartIos Failing request, in shutdown\n");
2385
2386             try_return( ntStatus = STATUS_TOO_LATE);
2387         }
2388
2389         //
2390         // Allocate our request structure and send it to the worker
2391         //
2392
2393         pWorkItem = (AFSWorkItem *)AFSLibExAllocatePoolWithTag( NonPagedPool,
2394                                                                 sizeof( AFSWorkItem),
2395                                                                 AFS_WORK_ITEM_TAG);
2396
2397         if( pWorkItem == NULL)
2398         {
2399
2400             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2401                           AFS_TRACE_LEVEL_ERROR,
2402                           "AFSQueueStartIos Failed to allocate work item\n");
2403
2404             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2405         }
2406
2407         RtlZeroMemory( pWorkItem,
2408                        sizeof( AFSWorkItem));
2409
2410         KeInitializeEvent( &pWorkItem->Event,
2411                            NotificationEvent,
2412                            FALSE);
2413
2414         pWorkItem->Size = sizeof( AFSWorkItem);
2415
2416         pWorkItem->ProcessID = (ULONGLONG)PsGetCurrentProcessId();
2417
2418         pWorkItem->RequestType = AFS_WORK_START_IOS;
2419
2420         pWorkItem->Specific.CacheAccess.CacheFileObject = CacheFileObject;
2421
2422         pWorkItem->Specific.CacheAccess.FunctionCode = FunctionCode;
2423
2424         pWorkItem->Specific.CacheAccess.RequestFlags = RequestFlags;
2425
2426         pWorkItem->Specific.CacheAccess.IoRuns = IoRuns;
2427
2428         pWorkItem->Specific.CacheAccess.RunCount = RunCount;
2429
2430         pWorkItem->Specific.CacheAccess.GatherIo = GatherIo;
2431
2432         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2433                       AFS_TRACE_LEVEL_VERBOSE,
2434                       "AFSQueueStartIos Queuing IO Workitem %08lX\n",
2435                       pWorkItem);
2436
2437         ntStatus = AFSQueueIOWorkerRequest( pWorkItem);
2438
2439 try_exit:
2440
2441         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2442                       AFS_TRACE_LEVEL_VERBOSE,
2443                       "AFSQueueStartIos Request complete Status %08lX\n",
2444                       ntStatus);
2445
2446         if( !NT_SUCCESS( ntStatus))
2447         {
2448
2449             if( pWorkItem != NULL)
2450             {
2451
2452                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2453             }
2454         }
2455     }
2456     __except( AFSExceptionFilter( __FUNCTION__, GetExceptionCode(), GetExceptionInformation()) )
2457     {
2458
2459         AFSDbgLogMsg( 0,
2460                       0,
2461                       "EXCEPTION - AFSQueueStartIos\n");
2462
2463         AFSDumpTraceFilesFnc();
2464     }
2465
2466     return ntStatus;
2467 }
2468
2469 NTSTATUS
2470 AFSQueueInvalidateObject( IN AFSObjectInfoCB *ObjectInfo,
2471                           IN ULONG InvalidateReason)
2472 {
2473
2474     NTSTATUS ntStatus = STATUS_SUCCESS;
2475     AFSWorkItem *pWorkItem = NULL;
2476
2477     __try
2478     {
2479
2480         pWorkItem = (AFSWorkItem *) AFSLibExAllocatePoolWithTag( NonPagedPool,
2481                                                                  sizeof(AFSWorkItem),
2482                                                                  AFS_WORK_ITEM_TAG);
2483         if (NULL == pWorkItem)
2484         {
2485
2486             AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2487                           AFS_TRACE_LEVEL_ERROR,
2488                           "AFSQueueInvalidateObject Failed to allocate work item\n");
2489
2490             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES );
2491         }
2492
2493         RtlZeroMemory( pWorkItem,
2494                        sizeof(AFSWorkItem));
2495
2496         pWorkItem->Size = sizeof( AFSWorkItem);
2497
2498         pWorkItem->RequestType = AFS_WORK_INVALIDATE_OBJECT;
2499
2500         pWorkItem->Specific.Invalidate.ObjectInfo = ObjectInfo;
2501
2502         pWorkItem->Specific.Invalidate.InvalidateReason = InvalidateReason;
2503
2504         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2505                       AFS_TRACE_LEVEL_VERBOSE,
2506                       "AFSQueueInvalidateObject Workitem %08lX\n",
2507                       pWorkItem);
2508
2509         ntStatus = AFSQueueWorkerRequest( pWorkItem);
2510
2511 try_exit:
2512
2513         AFSDbgLogMsg( AFS_SUBSYSTEM_WORKER_PROCESSING,
2514                       AFS_TRACE_LEVEL_VERBOSE,
2515                       "AFSQueueInvalidateObject Request complete Status %08lX\n",
2516                       ntStatus);
2517
2518         if( !NT_SUCCESS( ntStatus))
2519         {
2520
2521             if( pWorkItem != NULL)
2522             {
2523                 ExFreePoolWithTag( pWorkItem, AFS_WORK_ITEM_TAG);
2524             }
2525
2526             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2527                           AFS_TRACE_LEVEL_ERROR,
2528                           "AFSQueueInvalidateObject Failed to queue request Status %08lX\n",
2529                           ntStatus);
2530         }
2531     }
2532     __except( AFSExceptionFilter( __FUNCTION__, GetExceptionCode(), GetExceptionInformation()) )
2533     {
2534
2535         AFSDbgLogMsg( 0,
2536                       0,
2537                       "EXCEPTION - AFSQueueInvalidateObject\n");
2538
2539         AFSDumpTraceFilesFnc();
2540     }
2541
2542     return ntStatus;
2543 }