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

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011 Kernel Drivers, LLC.
   3  * Copyright (c) 2009, 2010, 2011, 2012, 2013 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, this list of conditions and the following disclaimer in the
  14  *   documentation and/or other materials provided with the distribution.
  15  * - Neither the names of Kernel Drivers, LLC and Your File System, Inc.
  16  *   nor the names of their contributors may be used to endorse or promote
  17  *   products derived from this software without specific prior written
  18  *   permission from Kernel Drivers, LLC and Your File System, Inc.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  23  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  24  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 //
  34 // File: AFSVolume.cpp
  35 //
  36
  37 #include "AFSCommon.h"
  38
  39 NTSTATUS
  40 AFSInitVolume( IN GUID *AuthGroup,
  41                IN AFSFileID *RootFid,
  42                IN LONG VolumeReferenceReason,
  43                OUT AFSVolumeCB **VolumeCB)
  44 {
  45
  46     NTSTATUS ntStatus = STATUS_SUCCESS;
  47     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
  48     AFSNonPagedVolumeCB *pNonPagedVcb = NULL;
  49     AFSVolumeCB *pVolumeCB = NULL;
  50     AFSNonPagedObjectInfoCB *pNonPagedObject = NULL;
  51     ULONGLONG ullIndex = 0;
  52     BOOLEAN bReleaseLocks = FALSE;
  53     AFSVolumeInfoCB stVolumeInformation = {0};
  54     AFSNonPagedDirectoryCB *pNonPagedDirEntry = NULL;
  55     LONG lCount;
  56
  57     __Enter
  58     {
  59
  60         //
  61         // Before grabbing any locks ask the service for the volume information
  62         // This may be a waste but we need to get this information prior to
  63         // taking any volume tree locks. Don't do this for any 'reserved' cell entries
  64         //
  65
  66         if( RootFid->Cell != 0)
  67         {
  68
  69             RtlZeroMemory( &stVolumeInformation,
  70                            sizeof( AFSVolumeInfoCB));
  71
  72             ntStatus = AFSRetrieveVolumeInformation( AuthGroup,
  73                                                      RootFid,
  74                                                      &stVolumeInformation);
  75
  76             if( !NT_SUCCESS( ntStatus))
  77             {
  78
  79                 AFSDbgTrace(( AFS_SUBSYSTEM_LOAD_LIBRARY | AFS_SUBSYSTEM_INIT_PROCESSING,
  80                               AFS_TRACE_LEVEL_ERROR,
  81                               "AFSInitVolume AFSRetrieveVolumeInformation(RootFid) failure %08lX\n",
  82                               ntStatus));
  83
  84                 try_return( ntStatus);
  85             }
  86
  87             //
  88             // Grab our tree locks and see if we raced with someone else
  89             //
  90
  91             AFSAcquireExcl( pDeviceExt->Specific.RDR.VolumeTree.TreeLock,
  92                             TRUE);
  93
  94             AFSAcquireExcl( &pDeviceExt->Specific.RDR.VolumeListLock,
  95                             TRUE);
  96
  97             bReleaseLocks = TRUE;
  98
  99             ullIndex = AFSCreateHighIndex( RootFid);
 100
 101             ntStatus = AFSLocateHashEntry( pDeviceExt->Specific.RDR.VolumeTree.TreeHead,
 102                                            ullIndex,
 103                                            (AFSBTreeEntry **)&pVolumeCB);
 104
 105             if( NT_SUCCESS( ntStatus) &&
 106                 pVolumeCB != NULL)
 107             {
 108
 109                 //
 110                 // So we don't lock with an invalidation call ...
 111                 //
 112
 113                 lCount = AFSVolumeIncrement( pVolumeCB,
 114                                              VolumeReferenceReason);
 115
 116                 AFSDbgTrace(( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 117                               AFS_TRACE_LEVEL_VERBOSE,
 118                               "AFSInitVolume Increment count on volume %p Reason %u Cnt %d\n",
 119                               pVolumeCB,
 120                               VolumeReferenceReason,
 121                               lCount));
 122
 123                 AFSReleaseResource( pDeviceExt->Specific.RDR.VolumeTree.TreeLock);
 124
 125                 AFSReleaseResource( &pDeviceExt->Specific.RDR.VolumeListLock);
 126
 127                 bReleaseLocks = FALSE;
 128
 129                 AFSAcquireExcl( pVolumeCB->VolumeLock,
 130                                 TRUE);
 131
 132                 *VolumeCB = pVolumeCB;
 133
 134                 try_return( ntStatus);
 135             }
 136
 137             //
 138             // Revert our status from the above call back to success.
 139             //
 140
 141             ntStatus = STATUS_SUCCESS;
 142         }
 143
 144         //
 145         // For the global root we allocate out volume node and insert it
 146         // into the volume tree ...
 147         //
 148
 149         pVolumeCB = (AFSVolumeCB *)AFSExAllocatePoolWithTag( PagedPool,
 150                                                              sizeof( AFSVolumeCB),
 151                                                              AFS_VCB_ALLOCATION_TAG);
 152
 153         if( pVolumeCB == NULL)
 154         {
 155
 156             AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 157                           AFS_TRACE_LEVEL_ERROR,
 158                           "AFSInitVolume Failed to allocate the root volume cb\n"));
 159
 160             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 161         }
 162
 163         RtlZeroMemory( pVolumeCB,
 164                        sizeof( AFSVolumeCB));
 165
 166         //
 167         // The non paged portion
 168         //
 169
 170         pNonPagedVcb = (AFSNonPagedVolumeCB *)AFSExAllocatePoolWithTag( NonPagedPool,
 171                                                                         sizeof( AFSNonPagedVolumeCB),
 172                                                                         AFS_VCB_NP_ALLOCATION_TAG);
 173
 174         if( pNonPagedVcb == NULL)
 175         {
 176
 177             AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 178                           AFS_TRACE_LEVEL_ERROR,
 179                           "AFSInitVolume Failed to allocate the root non paged volume cb\n"));
 180
 181             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 182         }
 183
 184         RtlZeroMemory( pNonPagedVcb,
 185                        sizeof( AFSNonPagedVolumeCB));
 186
 187         ExInitializeResourceLite( &pNonPagedVcb->VolumeLock);
 188
 189         ExInitializeResourceLite( &pNonPagedVcb->ObjectInfoTreeLock);
 190
 191         pNonPagedObject = (AFSNonPagedObjectInfoCB *)AFSExAllocatePoolWithTag( NonPagedPool,
 192                                                                                sizeof( AFSNonPagedObjectInfoCB),
 193                                                                                AFS_NP_OBJECT_INFO_TAG);
 194
 195         if( pNonPagedObject == NULL)
 196         {
 197
 198             AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 199                           AFS_TRACE_LEVEL_ERROR,
 200                           "AFSInitVolume Failed to allocate the root non paged object cb\n"));
 201
 202             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 203         }
 204
 205         RtlZeroMemory( pNonPagedObject,
 206                        sizeof( AFSNonPagedObjectInfoCB));
 207
 208         ExInitializeResourceLite( &pNonPagedObject->ObjectInfoLock);
 209
 210         ExInitializeResourceLite( &pNonPagedObject->DirectoryNodeHdrLock);
 211
 212         pVolumeCB->NonPagedVcb = pNonPagedVcb;
 213
 214         pVolumeCB->ObjectInformation.NonPagedInfo = pNonPagedObject;
 215
 216         pVolumeCB->VolumeLock = &pNonPagedVcb->VolumeLock;
 217
 218         pVolumeCB->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock = &pNonPagedObject->DirectoryNodeHdrLock;
 219
 220         pVolumeCB->ObjectInfoTree.TreeLock = &pNonPagedVcb->ObjectInfoTreeLock;
 221
 222         lCount = AFSVolumeIncrement( pVolumeCB,
 223                                      VolumeReferenceReason);
 224
 225         AFSDbgTrace(( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 226                       AFS_TRACE_LEVEL_VERBOSE,
 227                       "AFSInitVolume Initializing volume %p Reason %u count %d\n",
 228                       pVolumeCB,
 229                       VolumeReferenceReason,
 230                       lCount));
 231
 232         AFSAcquireExcl( pVolumeCB->VolumeLock,
 233                         TRUE);
 234
 235         pVolumeCB->DirectoryCB = (AFSDirectoryCB *)AFSExAllocatePoolWithTag( PagedPool,
 236                                                                              sizeof( AFSDirectoryCB) + sizeof( WCHAR),
 237                                                                              AFS_DIR_ENTRY_TAG);
 238
 239         if( pVolumeCB->DirectoryCB == NULL)
 240         {
 241
 242             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 243         }
 244
 245         AFSDbgTrace(( AFS_SUBSYSTEM_DIRENTRY_ALLOCATION,
 246                       AFS_TRACE_LEVEL_VERBOSE,
 247                       "AFSInitVolume AFS_DIR_ENTRY_TAG allocated %p\n",
 248                       pVolumeCB->DirectoryCB));
 249
 250         pNonPagedDirEntry = (AFSNonPagedDirectoryCB *)AFSExAllocatePoolWithTag( NonPagedPool,
 251                                                                                 sizeof( AFSNonPagedDirectoryCB),
 252                                                                                 AFS_DIR_ENTRY_NP_TAG);
 253
 254         if( pNonPagedDirEntry == NULL)
 255         {
 256
 257             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 258         }
 259
 260         RtlZeroMemory( pVolumeCB->DirectoryCB,
 261                        sizeof( AFSDirectoryCB) + sizeof( WCHAR));
 262
 263         RtlZeroMemory( pNonPagedDirEntry,
 264                        sizeof( AFSNonPagedDirectoryCB));
 265
 266         ExInitializeResourceLite( &pNonPagedDirEntry->Lock);
 267
 268         pVolumeCB->DirectoryCB->NonPaged = pNonPagedDirEntry;
 269
 270         //
 271         // Initialize the non-paged portion of the directory entry
 272         //
 273
 274         KeQuerySystemTime( &pVolumeCB->ObjectInformation.CreationTime);
 275         KeQuerySystemTime( &pVolumeCB->ObjectInformation.LastWriteTime);
 276         KeQuerySystemTime( &pVolumeCB->ObjectInformation.LastAccessTime);
 277
 278         pVolumeCB->ObjectInformation.FileType = AFS_FILE_TYPE_DIRECTORY;
 279
 280         SetFlag( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_ROOT_VOLUME);
 281
 282         pVolumeCB->ObjectInformation.FileId.Cell = RootFid->Cell;
 283         pVolumeCB->ObjectInformation.FileId.Volume = RootFid->Volume;
 284         pVolumeCB->ObjectInformation.FileId.Vnode = RootFid->Vnode;
 285         pVolumeCB->ObjectInformation.FileId.Unique = RootFid->Unique;
 286         pVolumeCB->ObjectInformation.FileId.Hash = RootFid->Hash;
 287
 288         pVolumeCB->ObjectInformation.FileAttributes = FILE_ATTRIBUTE_DIRECTORY;
 289
 290         pVolumeCB->DirectoryCB->NameInformation.FileName.Length = sizeof( WCHAR);
 291
 292         pVolumeCB->DirectoryCB->NameInformation.FileName.MaximumLength = pVolumeCB->DirectoryCB->NameInformation.FileName.Length;
 293
 294         pVolumeCB->DirectoryCB->NameInformation.FileName.Buffer = (WCHAR *)((char *)pVolumeCB->DirectoryCB + sizeof( AFSDirectoryCB));
 295
 296         RtlCopyMemory( pVolumeCB->DirectoryCB->NameInformation.FileName.Buffer,
 297                        L"\\",
 298                        sizeof( WCHAR));
 299
 300         //
 301         // Copy in the volume information retrieved above
 302         //
 303
 304         RtlCopyMemory( &pVolumeCB->VolumeInformation,
 305                        &stVolumeInformation,
 306                        sizeof( AFSVolumeInfoCB));
 307
 308         //
 309         // Setup pointers
 310         //
 311
 312         pVolumeCB->DirectoryCB->ObjectInformation = &pVolumeCB->ObjectInformation;
 313
 314         //
 315         // The ObjectInformation VolumeCB pointer does not obtain
 316         // a reference count.
 317         //
 318
 319         pVolumeCB->DirectoryCB->ObjectInformation->VolumeCB = pVolumeCB;
 320
 321         //
 322         // Insert the volume into our volume tree. Don't insert any reserved entries
 323         //
 324
 325         if( RootFid->Cell != 0)
 326         {
 327
 328             pVolumeCB->TreeEntry.HashIndex = ullIndex;
 329
 330             if( pDeviceExt->Specific.RDR.VolumeTree.TreeHead == NULL)
 331             {
 332
 333                 pDeviceExt->Specific.RDR.VolumeTree.TreeHead = &pVolumeCB->TreeEntry;
 334
 335                 SetFlag( pVolumeCB->Flags, AFS_VOLUME_INSERTED_HASH_TREE);
 336             }
 337             else
 338             {
 339
 340                 if ( NT_SUCCESS( AFSInsertHashEntry( pDeviceExt->Specific.RDR.VolumeTree.TreeHead,
 341                                                      &pVolumeCB->TreeEntry)))
 342                 {
 343
 344                     SetFlag( pVolumeCB->Flags, AFS_VOLUME_INSERTED_HASH_TREE);
 345                 }
 346             }
 347
 348             if( pDeviceExt->Specific.RDR.VolumeListHead == NULL)
 349             {
 350
 351                 pDeviceExt->Specific.RDR.VolumeListHead = pVolumeCB;
 352             }
 353             else
 354             {
 355
 356                 pDeviceExt->Specific.RDR.VolumeListTail->ListEntry.fLink = (void *)pVolumeCB;
 357
 358                 pVolumeCB->ListEntry.bLink = pDeviceExt->Specific.RDR.VolumeListTail;
 359             }
 360
 361             pDeviceExt->Specific.RDR.VolumeListTail = pVolumeCB;
 362         }
 363
 364         *VolumeCB = pVolumeCB;
 365
 366 try_exit:
 367
 368         if( !NT_SUCCESS( ntStatus))
 369         {
 370
 371             if( pNonPagedVcb != NULL)
 372             {
 373
 374                 AFSReleaseResource( pVolumeCB->VolumeLock);
 375
 376                 ExDeleteResourceLite( &pNonPagedVcb->VolumeLock);
 377
 378                 ExDeleteResourceLite( &pNonPagedVcb->ObjectInfoTreeLock);
 379
 380                 AFSExFreePoolWithTag( pNonPagedVcb, AFS_VCB_NP_ALLOCATION_TAG);
 381             }
 382
 383             if( pNonPagedObject != NULL)
 384             {
 385
 386                 ExDeleteResourceLite( &pNonPagedObject->ObjectInfoLock);
 387
 388                 AFSExFreePoolWithTag( pNonPagedObject, AFS_NP_OBJECT_INFO_TAG);
 389             }
 390
 391             if( pVolumeCB != NULL)
 392             {
 393
 394                 if( pVolumeCB->DirectoryCB != NULL)
 395                 {
 396
 397                     AFSDbgTrace(( AFS_SUBSYSTEM_DIRENTRY_ALLOCATION,
 398                                   AFS_TRACE_LEVEL_VERBOSE,
 399                                   "AFSInitVolume AFS_DIR_ENTRY_TAG deallocating %p\n",
 400                                   pVolumeCB->DirectoryCB));
 401
 402                     AFSExFreePoolWithTag( pVolumeCB->DirectoryCB, AFS_DIR_ENTRY_TAG);
 403                 }
 404
 405                 AFSExFreePoolWithTag( pVolumeCB, AFS_VCB_ALLOCATION_TAG);
 406             }
 407
 408             if( pNonPagedDirEntry != NULL)
 409             {
 410
 411                 ExDeleteResourceLite( &pNonPagedDirEntry->Lock);
 412
 413                 AFSExFreePoolWithTag( pNonPagedDirEntry, AFS_DIR_ENTRY_NP_TAG);
 414             }
 415         }
 416
 417         if( bReleaseLocks)
 418         {
 419
 420             AFSReleaseResource( pDeviceExt->Specific.RDR.VolumeTree.TreeLock);
 421
 422             AFSReleaseResource( &pDeviceExt->Specific.RDR.VolumeListLock);
 423         }
 424     }
 425
 426     return ntStatus;
 427 }
 428
 429 NTSTATUS
 430 AFSRemoveVolume( IN AFSVolumeCB *VolumeCB)
 431 {
 432
 433     NTSTATUS ntStatus = STATUS_SUCCESS;
 434     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
 435     LONG lCount;
 436
 437     __Enter
 438     {
 439
 440         ASSERT( VolumeCB->VolumeReferenceCount == 0);
 441
 442         //
 443         // Remove the volume from the tree and list
 444         // Don't process the list information for reserved entries
 445         //
 446
 447         if( VolumeCB->ObjectInformation.FileId.Cell != 0)
 448         {
 449
 450             if( BooleanFlagOn( VolumeCB->Flags, AFS_VOLUME_INSERTED_HASH_TREE))
 451             {
 452
 453                 AFSRemoveHashEntry( &pDeviceExt->Specific.RDR.VolumeTree.TreeHead,
 454                                     &VolumeCB->TreeEntry);
 455             }
 456
 457             if( VolumeCB->ListEntry.fLink == NULL)
 458             {
 459
 460                 pDeviceExt->Specific.RDR.VolumeListTail = (AFSVolumeCB *)VolumeCB->ListEntry.bLink;
 461
 462                 if( pDeviceExt->Specific.RDR.VolumeListTail != NULL)
 463                 {
 464
 465                     pDeviceExt->Specific.RDR.VolumeListTail->ListEntry.fLink = NULL;
 466                 }
 467             }
 468             else
 469             {
 470
 471                 ((AFSVolumeCB *)(VolumeCB->ListEntry.fLink))->ListEntry.bLink = VolumeCB->ListEntry.bLink;
 472             }
 473
 474             if( VolumeCB->ListEntry.bLink == NULL)
 475             {
 476
 477                 pDeviceExt->Specific.RDR.VolumeListHead = (AFSVolumeCB *)VolumeCB->ListEntry.fLink;
 478
 479                 if( pDeviceExt->Specific.RDR.VolumeListHead != NULL)
 480                 {
 481
 482                     pDeviceExt->Specific.RDR.VolumeListHead->ListEntry.bLink = NULL;
 483                 }
 484             }
 485             else
 486             {
 487
 488                 ((AFSVolumeCB *)(VolumeCB->ListEntry.bLink))->ListEntry.fLink = VolumeCB->ListEntry.fLink;
 489             }
 490         }
 491
 492         //
 493         // Remove any PIOctl objects we have
 494         //
 495
 496         if( VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB != NULL)
 497         {
 498
 499             if( VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb != NULL)
 500             {
 501
 502                 AFSAcquireExcl( &VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->NonPagedInfo->ObjectInfoLock,
 503                                 TRUE);
 504
 505                 AFSRemoveFcb( &VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->Fcb);
 506
 507                 AFSReleaseResource( &VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->ObjectInformation->NonPagedInfo->ObjectInfoLock);
 508             }
 509
 510             lCount = AFSObjectInfoDecrement( VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->ObjectInformation,
 511                                              AFS_OBJECT_REFERENCE_PIOCTL);
 512
 513             AFSDbgTrace(( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
 514                           AFS_TRACE_LEVEL_VERBOSE,
 515                           "AFSRemoveVolume Decrement count on object %p Cnt %d\n",
 516                           VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->ObjectInformation,
 517                           lCount));
 518
 519             ASSERT( lCount == 0);
 520
 521             if ( lCount == 0)
 522             {
 523
 524                 AFSDeleteObjectInfo( &VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->ObjectInformation);
 525             }
 526
 527             ExDeleteResourceLite( &VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->NonPaged->Lock);
 528
 529             AFSExFreePoolWithTag( VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB->NonPaged, AFS_DIR_ENTRY_NP_TAG);
 530
 531             AFSDbgTrace(( AFS_SUBSYSTEM_DIRENTRY_ALLOCATION,
 532                           AFS_TRACE_LEVEL_VERBOSE,
 533                           "AFSRemoveVolume (pioctl) AFS_DIR_ENTRY_TAG deallocating %p\n",
 534                           VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB));
 535
 536             AFSExFreePoolWithTag( VolumeCB->ObjectInformation.Specific.Directory.PIOCtlDirectoryCB, AFS_DIR_ENTRY_TAG);
 537         }
 538
 539         if( BooleanFlagOn( VolumeCB->ObjectInformation.Flags, AFS_OBJECT_HELD_IN_SERVICE))
 540         {
 541
 542             //
 543             // Release the fid in the service
 544             //
 545
 546             AFSReleaseFid( &VolumeCB->ObjectInformation.FileId);
 547         }
 548
 549         //
 550         // Free up the memory
 551         //
 552
 553         if( VolumeCB->NonPagedVcb != NULL)
 554         {
 555
 556             if( ExIsResourceAcquiredLite( VolumeCB->VolumeLock))
 557             {
 558                 AFSReleaseResource( VolumeCB->VolumeLock);
 559             }
 560
 561             ExDeleteResourceLite( &VolumeCB->NonPagedVcb->VolumeLock);
 562
 563             ExDeleteResourceLite( &VolumeCB->NonPagedVcb->ObjectInfoTreeLock);
 564
 565             AFSExFreePoolWithTag( VolumeCB->NonPagedVcb, AFS_VCB_NP_ALLOCATION_TAG);
 566         }
 567
 568         if( VolumeCB->ObjectInformation.NonPagedInfo != NULL)
 569         {
 570
 571             ExDeleteResourceLite( &VolumeCB->ObjectInformation.NonPagedInfo->ObjectInfoLock);
 572
 573             ExDeleteResourceLite( &VolumeCB->ObjectInformation.NonPagedInfo->DirectoryNodeHdrLock);
 574
 575             AFSExFreePoolWithTag( VolumeCB->ObjectInformation.NonPagedInfo, AFS_NP_OBJECT_INFO_TAG);
 576         }
 577
 578         if( VolumeCB->DirectoryCB != NULL)
 579         {
 580
 581             if( VolumeCB->DirectoryCB->NonPaged != NULL)
 582             {
 583
 584                 ExDeleteResourceLite( &VolumeCB->DirectoryCB->NonPaged->Lock);
 585
 586                 AFSExFreePoolWithTag( VolumeCB->DirectoryCB->NonPaged, AFS_DIR_ENTRY_NP_TAG);
 587             }
 588
 589             AFSDbgTrace(( AFS_SUBSYSTEM_DIRENTRY_ALLOCATION,
 590                           AFS_TRACE_LEVEL_VERBOSE,
 591                           "AFSRemoveVolume AFS_DIR_ENTRY_TAG deallocating %p\n",
 592                           VolumeCB->DirectoryCB));
 593
 594             AFSExFreePoolWithTag( VolumeCB->DirectoryCB, AFS_DIR_ENTRY_TAG);
 595         }
 596
 597         AFSExFreePoolWithTag( VolumeCB, AFS_VCB_ALLOCATION_TAG);
 598     }
 599
 600     return ntStatus;
 601 }
 602
 603 LONG
 604 AFSVolumeIncrement( IN AFSVolumeCB *VolumeCB,
 605                     IN LONG Reason)
 606 {
 607
 608     LONG lCount;
 609
 610     lCount = InterlockedIncrement( &VolumeCB->VolumeReferenceCount);
 611
 612     InterlockedIncrement( &VolumeCB->VolumeReferences[ Reason]);
 613
 614     return lCount;
 615 }
 616
 617 LONG
 618 AFSVolumeDecrement( IN AFSVolumeCB *VolumeCB,
 619                     IN LONG Reason)
 620 {
 621
 622     LONG lCount;
 623
 624     lCount = InterlockedDecrement( &VolumeCB->VolumeReferences[ Reason]);
 625
 626     ASSERT( lCount >= 0);
 627
 628     lCount = InterlockedDecrement( &VolumeCB->VolumeReferenceCount);
 629
 630     ASSERT( lCount >= 0);
 631
 632     return lCount;
 633 }