src/WINNT/afsrdr/kernel/lib/AFSNameSupport.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: AFSNameSupport.cpp
  37 //
  38
  39 #include "AFSCommon.h"
  40
  41 NTSTATUS
  42 AFSLocateNameEntry( IN GUID *AuthGroup,
  43                     IN PFILE_OBJECT FileObject,
  44                     IN UNICODE_STRING *RootPathName,
  45                     IN UNICODE_STRING *ParsedPathName,
  46                     IN AFSNameArrayHdr *NameArray,
  47                     IN ULONG Flags,
  48                     OUT AFSVolumeCB **VolumeCB,
  49                     IN OUT AFSDirectoryCB **ParentDirectoryCB,
  50                     OUT AFSDirectoryCB **DirectoryCB,
  51                     OUT PUNICODE_STRING ComponentName)
  52 {
  53
  54     NTSTATUS          ntStatus = STATUS_SUCCESS;
  55     UNICODE_STRING    uniPathName, uniComponentName, uniRemainingPath, uniSearchName, uniFullPathName;
  56     ULONG             ulCRC = 0;
  57     AFSDirectoryCB   *pDirEntry = NULL, *pParentDirEntry = NULL;
  58     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
  59     UNICODE_STRING    uniSysName;
  60     ULONG             ulSubstituteIndex = 0;
  61     BOOLEAN           bSubstituteName = FALSE;
  62     AFSNameArrayHdr  *pNameArray = NameArray;
  63     BOOLEAN           bAllocatedSymLinkBuffer = FALSE;
  64     UNICODE_STRING    uniRelativeName, uniNoOpName;
  65     AFSObjectInfoCB  *pCurrentObject = NULL;
  66     AFSObjectInfoCB  *pParentObjectInfo = NULL;
  67     AFSVolumeCB      *pCurrentVolume = *VolumeCB;
  68     BOOLEAN           bReleaseCurrentVolume = TRUE;
  69     BOOLEAN           bSubstitutedName = FALSE;
  70     LONG              lCount;
  71
  72     __Enter
  73     {
  74
  75         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
  76                       AFS_TRACE_LEVEL_VERBOSE_2,
  77                       "AFSLocateNameEntry (FO: %08lX) Processing full name %wZ\n",
  78                       FileObject,
  79                       RootPathName);
  80
  81         RtlInitUnicodeString( &uniSysName,
  82                               L"*@SYS");
  83
  84         RtlInitUnicodeString( &uniRelativeName,
  85                               L"..");
  86
  87         RtlInitUnicodeString( &uniNoOpName,
  88                               L".");
  89
  90         //
  91         // Cleanup some parameters
  92         //
  93
  94         if( ComponentName != NULL)
  95         {
  96
  97             ComponentName->Length = 0;
  98             ComponentName->MaximumLength = 0;
  99             ComponentName->Buffer = NULL;
 100         }
 101
 102         //
 103         // We will parse through the filename, locating the directory nodes until we encounter a cache miss
 104         // Starting at the root node
 105         //
 106
 107         pParentDirEntry = NULL;
 108
 109         pDirEntry = *ParentDirectoryCB;
 110
 111         uniPathName = *ParsedPathName;
 112
 113         uniFullPathName = *RootPathName;
 114
 115         uniComponentName.Length = uniComponentName.MaximumLength = 0;
 116         uniComponentName.Buffer = NULL;
 117
 118         uniRemainingPath.Length = uniRemainingPath.MaximumLength = 0;
 119         uniRemainingPath.Buffer = NULL;
 120
 121         uniSearchName.Length = uniSearchName.MaximumLength = 0;
 122         uniSearchName.Buffer = NULL;
 123
 124         ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
 125
 126         while( TRUE)
 127         {
 128
 129             //
 130             // Check our total link count for this name array
 131             //
 132
 133             if( pNameArray->LinkCount >= (LONG)pDevExt->Specific.RDR.MaxLinkCount)
 134             {
 135
 136                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 137             }
 138
 139             pCurrentObject = pDirEntry->ObjectInformation;
 140
 141             KeQueryTickCount( &pCurrentObject->LastAccessCount);
 142
 143             //
 144             // Check that the directory entry is not deleted or pending delete
 145             //
 146
 147             if( BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_DELETED))
 148             {
 149
 150                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 151                               AFS_TRACE_LEVEL_ERROR,
 152                               "AFSLocateNameEntry (FO: %08lX) Deleted parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 153                               FileObject,
 154                               &pDirEntry->NameInformation.FileName,
 155                               pCurrentObject->FileId.Cell,
 156                               pCurrentObject->FileId.Volume,
 157                               pCurrentObject->FileId.Vnode,
 158                               pCurrentObject->FileId.Unique,
 159                               STATUS_FILE_DELETED);
 160
 161                 try_return( ntStatus = STATUS_FILE_DELETED);
 162             }
 163
 164             if( BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_PENDING_DELETE))
 165             {
 166
 167                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 168                               AFS_TRACE_LEVEL_ERROR,
 169                               "AFSLocateNameEntry (FO: %08lX) Delete pending on %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 170                               FileObject,
 171                               &pDirEntry->NameInformation.FileName,
 172                               pCurrentObject->FileId.Cell,
 173                               pCurrentObject->FileId.Volume,
 174                               pCurrentObject->FileId.Vnode,
 175                               pCurrentObject->FileId.Unique,
 176                               STATUS_DELETE_PENDING);
 177
 178                 try_return( ntStatus = STATUS_DELETE_PENDING);
 179             }
 180
 181             //
 182             // Check if the directory requires verification
 183             //
 184
 185             if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_VERIFY) &&
 186                 ( pCurrentObject->FileType != AFS_FILE_TYPE_DIRECTORY ||
 187                   !AFSIsEnumerationInProcess( pCurrentObject)))
 188             {
 189
 190                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 191                               AFS_TRACE_LEVEL_VERBOSE,
 192                               "AFSLocateNameEntry (FO: %08lX) Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 193                               FileObject,
 194                               &pDirEntry->NameInformation.FileName,
 195                               pCurrentObject->FileId.Cell,
 196                               pCurrentObject->FileId.Volume,
 197                               pCurrentObject->FileId.Vnode,
 198                               pCurrentObject->FileId.Unique);
 199
 200                 //
 201                 // Directory TreeLock should be exclusively held
 202                 //
 203
 204                 AFSAcquireExcl( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock,
 205                                 TRUE);
 206
 207                 ntStatus = AFSVerifyEntry( AuthGroup,
 208                                            pDirEntry);
 209
 210                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
 211
 212                 if( !NT_SUCCESS( ntStatus))
 213                 {
 214
 215                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 216                                   AFS_TRACE_LEVEL_ERROR,
 217                                   "AFSLocateNameEntry (FO: %08lX) Failed to verify parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 218                                   FileObject,
 219                                   &pDirEntry->NameInformation.FileName,
 220                                   pCurrentObject->FileId.Cell,
 221                                   pCurrentObject->FileId.Volume,
 222                                   pCurrentObject->FileId.Vnode,
 223                                   pCurrentObject->FileId.Unique,
 224                                   ntStatus);
 225
 226                     try_return( ntStatus);
 227                 }
 228             }
 229
 230             //
 231             // Ensure the parent node has been evaluated, if not then go do it now
 232             //
 233
 234             if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_NOT_EVALUATED) ||
 235                 pCurrentObject->FileType == AFS_FILE_TYPE_UNKNOWN)
 236             {
 237
 238                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 239                               AFS_TRACE_LEVEL_VERBOSE,
 240                               "AFSLocateNameEntry (FO: %08lX) Evaluating parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 241                               FileObject,
 242                               &pDirEntry->NameInformation.FileName,
 243                               pCurrentObject->FileId.Cell,
 244                               pCurrentObject->FileId.Volume,
 245                               pCurrentObject->FileId.Vnode,
 246                               pCurrentObject->FileId.Unique);
 247
 248                 ntStatus = AFSEvaluateNode( AuthGroup,
 249                                             pDirEntry);
 250
 251                 if( !NT_SUCCESS( ntStatus))
 252                 {
 253
 254                     if ( ntStatus == STATUS_NOT_A_DIRECTORY)
 255                     {
 256
 257                         if ( pCurrentObject->ParentObjectInformation == NULL)
 258                         {
 259
 260                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 261                                           AFS_TRACE_LEVEL_ERROR,
 262                                           "AFSLocateNameEntry (FO: %08lX) Failed to evaluate object %wZ FID %08lX-%08lX-%08lX-%08lX PARENT NULL Status %08lX\n",
 263                                           FileObject,
 264                                           &pDirEntry->NameInformation.FileName,
 265                                           pCurrentObject->FileId.Cell,
 266                                           pCurrentObject->FileId.Volume,
 267                                           pCurrentObject->FileId.Vnode,
 268                                           pCurrentObject->FileId.Unique,
 269                                           ntStatus);
 270                         }
 271                         else
 272                         {
 273
 274                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 275                                           AFS_TRACE_LEVEL_ERROR,
 276                                           "AFSLocateNameEntry (FO: %08lX) Failed to evaluate object %wZ FID %08lX-%08lX-%08lX-%08lX PARENT %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 277                                           FileObject,
 278                                           &pDirEntry->NameInformation.FileName,
 279                                           pCurrentObject->FileId.Cell,
 280                                           pCurrentObject->FileId.Volume,
 281                                           pCurrentObject->FileId.Vnode,
 282                                           pCurrentObject->FileId.Unique,
 283                                           pCurrentObject->ParentObjectInformation->FileId.Cell,
 284                                           pCurrentObject->ParentObjectInformation->FileId.Volume,
 285                                           pCurrentObject->ParentObjectInformation->FileId.Vnode,
 286                                           pCurrentObject->ParentObjectInformation->FileId.Unique,
 287                                           ntStatus);
 288                         }
 289                     }
 290                     else
 291                     {
 292                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 293                                       AFS_TRACE_LEVEL_ERROR,
 294                                       "AFSLocateNameEntry (FO: %08lX) Failed to evaluate parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 295                                       FileObject,
 296                                       &pDirEntry->NameInformation.FileName,
 297                                       pCurrentObject->FileId.Cell,
 298                                       pCurrentObject->FileId.Volume,
 299                                       pCurrentObject->FileId.Vnode,
 300                                       pCurrentObject->FileId.Unique,
 301                                       ntStatus);
 302                     }
 303
 304                     try_return( ntStatus);
 305                 }
 306
 307                 ClearFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_NOT_EVALUATED);
 308             }
 309
 310             //
 311             // If this is a mount point or symlink then go get the real directory node
 312             //
 313
 314             switch( pCurrentObject->FileType)
 315             {
 316
 317                 case AFS_FILE_TYPE_SYMLINK:
 318                 {
 319
 320                     UNICODE_STRING uniTempName;
 321                     WCHAR *pTmpBuffer = NULL;
 322                     LONG lLinkCount = 0;
 323
 324                     //
 325                     // Check if the flag is set to NOT evaluate a symlink
 326                     // and we are done with the parsing
 327                     //
 328
 329                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_SL_TARGET_EVAL) &&
 330                         uniRemainingPath.Length == 0)
 331                     {
 332
 333                         //
 334                         // Pass back the directory entries
 335                         //
 336
 337                         *ParentDirectoryCB = pParentDirEntry;
 338
 339                         *DirectoryCB = pDirEntry;
 340
 341                         *VolumeCB = pCurrentVolume;
 342
 343                         *RootPathName = uniFullPathName;
 344
 345                         try_return( ntStatus);
 346                     }
 347
 348                     AFSAcquireExcl( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock,
 349                                     TRUE);
 350
 351                     AFSAcquireExcl( &pDirEntry->NonPaged->Lock,
 352                                     TRUE);
 353
 354                     if( pDirEntry->NameInformation.TargetName.Length == 0)
 355                     {
 356
 357                         //
 358                         // We'll reset the DV to ensure we validate the metadata content
 359                         //
 360
 361                         pCurrentObject->DataVersion.QuadPart = (ULONGLONG)-1;
 362
 363                         SetFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_VERIFY);
 364
 365                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 366                                       AFS_TRACE_LEVEL_VERBOSE,
 367                                       "AFSLocateNameEntry (FO: %08lX) Verifying symlink parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 368                                       FileObject,
 369                                       &pDirEntry->NameInformation.FileName,
 370                                       pCurrentObject->FileId.Cell,
 371                                       pCurrentObject->FileId.Volume,
 372                                       pCurrentObject->FileId.Vnode,
 373                                       pCurrentObject->FileId.Unique);
 374
 375                         //
 376                         // Directory TreeLock should be exclusively held
 377                         //
 378
 379                         ntStatus = AFSVerifyEntry( AuthGroup,
 380                                                    pDirEntry);
 381
 382                         AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
 383
 384                         if( !NT_SUCCESS( ntStatus))
 385                         {
 386
 387                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 388                                           AFS_TRACE_LEVEL_ERROR,
 389                                           "AFSLocateNameEntry (FO: %08lX) Failed to verify symlink parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 390                                           FileObject,
 391                                           &pDirEntry->NameInformation.FileName,
 392                                           pCurrentObject->FileId.Cell,
 393                                           pCurrentObject->FileId.Volume,
 394                                           pCurrentObject->FileId.Vnode,
 395                                           pCurrentObject->FileId.Unique,
 396                                           ntStatus);
 397
 398                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 399
 400                             try_return( ntStatus);
 401                         }
 402
 403                         //
 404                         // If the type changed then reprocess this entry
 405                         //
 406
 407                         if( pCurrentObject->FileType != AFS_FILE_TYPE_SYMLINK)
 408                         {
 409
 410                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 411
 412                             continue;
 413                         }
 414                     }
 415                     else
 416                     {
 417
 418                         AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
 419                     }
 420
 421                     //
 422                     // If we were given a zero length target name then deny access to the entry
 423                     //
 424
 425                     if( pDirEntry->NameInformation.TargetName.Length == 0)
 426                     {
 427
 428                         ntStatus = STATUS_REPARSE_POINT_NOT_RESOLVED;
 429
 430                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 431                                       AFS_TRACE_LEVEL_ERROR,
 432                                       "AFSLocateNameEntry (FO: %08lX) Failed to retrieve target name for symlink %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 433                                       FileObject,
 434                                       &pDirEntry->NameInformation.FileName,
 435                                       pCurrentObject->FileId.Cell,
 436                                       pCurrentObject->FileId.Volume,
 437                                       pCurrentObject->FileId.Vnode,
 438                                       pCurrentObject->FileId.Unique,
 439                                       ntStatus);
 440
 441                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 442
 443                         try_return( ntStatus);
 444                     }
 445
 446                     if( AFSIsRelativeName( &pDirEntry->NameInformation.TargetName))
 447                     {
 448
 449                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 450                                       AFS_TRACE_LEVEL_VERBOSE,
 451                                       "AFSLocateNameEntry (FO: %08lX) Processing relative symlink target %wZ for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 452                                       FileObject,
 453                                       &pDirEntry->NameInformation.TargetName,
 454                                       &pDirEntry->NameInformation.FileName,
 455                                       pCurrentObject->FileId.Cell,
 456                                       pCurrentObject->FileId.Volume,
 457                                       pCurrentObject->FileId.Vnode,
 458                                       pCurrentObject->FileId.Unique);
 459
 460                         //
 461                         // We'll substitute this name into the current process name
 462                         // starting at where we sit in the path
 463                         //
 464
 465                         uniTempName.Length = 0;
 466                         uniTempName.MaximumLength = (USHORT)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer) +
 467                                                                     pDirEntry->NameInformation.TargetName.Length +
 468                                                                     sizeof( WCHAR) +
 469                                                                     uniRemainingPath.Length;
 470
 471                         uniTempName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
 472                                                                                 uniTempName.MaximumLength,
 473                                                                                 AFS_NAME_BUFFER_ONE_TAG);
 474
 475                         if( uniTempName.Buffer == NULL)
 476                         {
 477
 478                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 479
 480                             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 481                         }
 482
 483                         //
 484                         // We have so first copy in the portion up to the component
 485                         // name
 486                         //
 487
 488                         RtlCopyMemory( uniTempName.Buffer,
 489                                        uniFullPathName.Buffer,
 490                                        (ULONG)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer));
 491
 492                         uniTempName.Length = (USHORT)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer);
 493
 494                         if( bAllocatedSymLinkBuffer ||
 495                             bSubstitutedName)
 496                         {
 497
 498                             pTmpBuffer = uniFullPathName.Buffer;
 499                         }
 500
 501                         bAllocatedSymLinkBuffer = TRUE;
 502
 503                         //
 504                         // Have we parsed this name yet? Better have at least once ...
 505                         //
 506
 507                         if( uniComponentName.Length == 0)
 508                         {
 509                             ASSERT( FALSE);
 510                         }
 511
 512                         //
 513                         // Copy in the target name ...
 514                         //
 515
 516                         RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
 517                                        pDirEntry->NameInformation.TargetName.Buffer,
 518                                        pDirEntry->NameInformation.TargetName.Length);
 519
 520                         uniPathName.Buffer = &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)];
 521
 522                         uniPathName.Length += pDirEntry->NameInformation.TargetName.Length;
 523                         uniPathName.MaximumLength = uniTempName.MaximumLength;
 524
 525                         uniTempName.Length += pDirEntry->NameInformation.TargetName.Length;
 526
 527                         //
 528                         // And now any remaining portion of the name
 529                         //
 530
 531                         if( uniRemainingPath.Length > 0)
 532                         {
 533
 534                             if( uniRemainingPath.Buffer[ 0] != L'\\')
 535                             {
 536
 537                                 uniRemainingPath.Buffer--;
 538                                 uniRemainingPath.Length += sizeof( WCHAR);
 539
 540                                 uniPathName.Length += sizeof( WCHAR);
 541                             }
 542
 543                             RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
 544                                            uniRemainingPath.Buffer,
 545                                            uniRemainingPath.Length);
 546
 547                             uniTempName.Length += uniRemainingPath.Length;
 548                         }
 549
 550                         uniFullPathName = uniTempName;
 551
 552                         if( pTmpBuffer != NULL)
 553                         {
 554
 555                             AFSExFreePoolWithTag( pTmpBuffer, 0);
 556                         }
 557
 558                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 559
 560                         //
 561                         // Dereference the current entry ..
 562                         //
 563
 564                         lCount = InterlockedDecrement( &pDirEntry->OpenReferenceCount);
 565
 566                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 567                                       AFS_TRACE_LEVEL_VERBOSE,
 568                                       "AFSLocateNameEntry Decrement1 count on %wZ DE %p Ccb %p Cnt %d\n",
 569                                       &pDirEntry->NameInformation.FileName,
 570                                       pDirEntry,
 571                                       NULL,
 572                                       lCount);
 573
 574                         //
 575                         // OK, need to back up one entry for the correct parent since the current
 576                         // entry we are on is the symlink itself
 577                         //
 578
 579                         pDirEntry = AFSBackupEntry( pNameArray);
 580
 581                         //
 582                         // Increment our reference on this dir entry
 583                         //
 584
 585                         lCount = InterlockedIncrement( &pDirEntry->OpenReferenceCount);
 586
 587                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 588                                       AFS_TRACE_LEVEL_VERBOSE,
 589                                       "AFSLocateNameEntry Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
 590                                       &pDirEntry->NameInformation.FileName,
 591                                       pDirEntry,
 592                                       NULL,
 593                                       lCount);
 594
 595                         if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_ROOT_VOLUME))
 596                         {
 597
 598                             pParentDirEntry = NULL;
 599                         }
 600                         else
 601                         {
 602
 603                             pParentDirEntry = AFSGetParentEntry( pNameArray);
 604
 605                             ASSERT( pParentDirEntry != pDirEntry);
 606                         }
 607                     }
 608                     else
 609                     {
 610
 611                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 612                                       AFS_TRACE_LEVEL_VERBOSE,
 613                                       "AFSLocateNameEntry (FO: %08lX) Processing absolute symlink target %wZ for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 614                                       FileObject,
 615                                       &pDirEntry->NameInformation.TargetName,
 616                                       &pDirEntry->NameInformation.FileName,
 617                                       pCurrentObject->FileId.Cell,
 618                                       pCurrentObject->FileId.Volume,
 619                                       pCurrentObject->FileId.Vnode,
 620                                       pCurrentObject->FileId.Unique);
 621
 622                         //
 623                         // We'll substitute this name into the current process name
 624                         // starting at where we sit in the path
 625                         //
 626
 627                         uniTempName.Length = 0;
 628                         uniTempName.MaximumLength = pDirEntry->NameInformation.TargetName.Length +
 629                                                                     sizeof( WCHAR) +
 630                                                                     uniRemainingPath.Length;
 631
 632                         uniTempName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
 633                                                                                 uniTempName.MaximumLength,
 634                                                                                 AFS_NAME_BUFFER_TWO_TAG);
 635
 636                         if( uniTempName.Buffer == NULL)
 637                         {
 638
 639                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 640
 641                             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 642                         }
 643
 644                         if( bAllocatedSymLinkBuffer ||
 645                             bSubstitutedName)
 646                         {
 647
 648                             pTmpBuffer = uniFullPathName.Buffer;
 649                         }
 650
 651                         bAllocatedSymLinkBuffer = TRUE;
 652
 653                         //
 654                         // Have we parsed this name yet? Better have at least once ...
 655                         //
 656
 657                         if( uniComponentName.Length == 0)
 658                         {
 659                             ASSERT( FALSE);
 660                         }
 661
 662                         //
 663                         // Copy in the target name ...
 664                         //
 665
 666                         RtlCopyMemory( uniTempName.Buffer,
 667                                        pDirEntry->NameInformation.TargetName.Buffer,
 668                                        pDirEntry->NameInformation.TargetName.Length);
 669
 670                         uniTempName.Length = pDirEntry->NameInformation.TargetName.Length;
 671
 672                         //
 673                         // And now any remaining portion of the name
 674                         //
 675
 676                         if( uniRemainingPath.Length > 0)
 677                         {
 678
 679                             if( uniRemainingPath.Buffer[ 0] != L'\\')
 680                             {
 681
 682                                 uniRemainingPath.Buffer--;
 683                                 uniRemainingPath.Length += sizeof( WCHAR);
 684                             }
 685
 686                             RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
 687                                            uniRemainingPath.Buffer,
 688                                            uniRemainingPath.Length);
 689
 690                             uniTempName.Length += uniRemainingPath.Length;
 691                         }
 692
 693                         uniFullPathName = uniTempName;
 694
 695                         uniPathName = uniTempName;
 696
 697                         if( pTmpBuffer != NULL)
 698                         {
 699
 700                             AFSExFreePoolWithTag( pTmpBuffer, 0);
 701                         }
 702
 703                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 704
 705                         //
 706                         // If our current volume is not the global root then make it so ...
 707                         //
 708
 709                         if( pCurrentVolume != AFSGlobalRoot)
 710                         {
 711
 712                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 713                                           AFS_TRACE_LEVEL_VERBOSE,
 714                                           "AFSLocateNameEntry (FO: %08lX) Current volume not global, resetting for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 715                                           FileObject,
 716                                           &pDirEntry->NameInformation.FileName,
 717                                           pCurrentObject->FileId.Cell,
 718                                           pCurrentObject->FileId.Volume,
 719                                           pCurrentObject->FileId.Vnode,
 720                                           pCurrentObject->FileId.Unique);
 721
 722                             lCount = InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
 723
 724                             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 725                                           AFS_TRACE_LEVEL_VERBOSE,
 726                                           "AFSLocateNameEntry Decrement count on volume %08lX Cnt %d\n",
 727                                           pCurrentVolume,
 728                                           lCount);
 729
 730                             pCurrentVolume = AFSGlobalRoot;
 731
 732                             lCount = InterlockedIncrement( &pCurrentVolume->VolumeReferenceCount);
 733
 734                             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 735                                           AFS_TRACE_LEVEL_VERBOSE,
 736                                           "AFSLocateNameEntry Increment count on volume %08lX Cnt %d\n",
 737                                           pCurrentVolume,
 738                                           lCount);
 739                         }
 740
 741                         //
 742                         // Dereference our current dir entry
 743                         //
 744
 745                         lCount = InterlockedDecrement( &pDirEntry->OpenReferenceCount);
 746
 747                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 748                                       AFS_TRACE_LEVEL_VERBOSE,
 749                                       "AFSLocateNameEntry Decrement2 count on %wZ DE %p Ccb %p Cnt %d\n",
 750                                       &pDirEntry->NameInformation.FileName,
 751                                       pDirEntry,
 752                                       NULL,
 753                                       lCount);
 754
 755                         pDirEntry = pCurrentVolume->DirectoryCB;
 756
 757                         //
 758                         // Reference the new dir entry
 759                         //
 760
 761                         lCount = InterlockedIncrement( &pDirEntry->OpenReferenceCount);
 762
 763                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 764                                       AFS_TRACE_LEVEL_VERBOSE,
 765                                       "AFSLocateNameEntry Increment2 count on %wZ DE %p Ccb %p Cnt %d\n",
 766                                       &pDirEntry->NameInformation.FileName,
 767                                       pDirEntry,
 768                                       NULL,
 769                                       lCount);
 770
 771                         //
 772                         // Reset the name array
 773                         // Persist the link count in the name array
 774                         //
 775
 776                         lLinkCount = pNameArray->LinkCount;
 777
 778                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 779                                       AFS_TRACE_LEVEL_VERBOSE,
 780                                       "AFSLocateNameEntry (FO: %08lX) Resetting name array for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 781                                       FileObject,
 782                                       &pDirEntry->NameInformation.FileName,
 783                                       pCurrentObject->FileId.Cell,
 784                                       pCurrentObject->FileId.Volume,
 785                                       pCurrentObject->FileId.Vnode,
 786                                       pCurrentObject->FileId.Unique);
 787
 788                         AFSResetNameArray( pNameArray,
 789                                            pDirEntry);
 790
 791                         pNameArray->LinkCount = lLinkCount;
 792
 793                         //
 794                         // Process over the \\<Global root> portion of the name
 795                         //
 796
 797                         FsRtlDissectName( uniPathName,
 798                                           &uniComponentName,
 799                                           &uniRemainingPath);
 800
 801                         if( RtlCompareUnicodeString( &uniComponentName,
 802                                                      &AFSServerName,
 803                                                      TRUE) != 0)
 804                         {
 805
 806                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 807                                           AFS_TRACE_LEVEL_ERROR,
 808                                           "AFSLocateNameEntry Name %wZ contains invalid server name\n",
 809                                           &uniPathName);
 810
 811                             //
 812                             // The correct response would be STATUS_OBJECT_PATH_INVALID
 813                             // but that prevents cmd.exe from performing a recursive
 814                             // directory enumeration when opening a directory entry
 815                             // that represents a symlink to an invalid path is discovered.
 816                             //
 817                             try_return( ntStatus = STATUS_OBJECT_PATH_NOT_FOUND);
 818                         }
 819
 820                         uniPathName = uniRemainingPath;
 821
 822                         pParentDirEntry = NULL;
 823                     }
 824
 825                     //
 826                     // Increment our link count
 827                     //
 828
 829                     lCount = InterlockedIncrement( &pNameArray->LinkCount);
 830
 831                     continue;
 832                 }
 833
 834                 case AFS_FILE_TYPE_MOUNTPOINT:
 835                 {
 836
 837                     //
 838                     // Check if the flag is set to NOT evaluate a mount point
 839                     // and we are done with the parsing
 840                     //
 841
 842                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_MP_TARGET_EVAL) &&
 843                         uniRemainingPath.Length == 0)
 844                     {
 845
 846                         //
 847                         // Pass back the directory entries
 848                         //
 849
 850                         *ParentDirectoryCB = pParentDirEntry;
 851
 852                         *DirectoryCB = pDirEntry;
 853
 854                         *VolumeCB = pCurrentVolume;
 855
 856                         *RootPathName = uniFullPathName;
 857
 858                         try_return( ntStatus);
 859                     }
 860
 861                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 862                                   AFS_TRACE_LEVEL_VERBOSE,
 863                                   "AFSLocateNameEntry (FO: %08lX) Building MP target for parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 864                                   FileObject,
 865                                   &pDirEntry->NameInformation.FileName,
 866                                   pCurrentObject->FileId.Cell,
 867                                   pCurrentObject->FileId.Volume,
 868                                   pCurrentObject->FileId.Vnode,
 869                                   pCurrentObject->FileId.Unique);
 870
 871                     //
 872                     // Go retrieve the target entry for this node
 873                     // Release the current volume cb entry since we would
 874                     // have lock inversion in the following call
 875                     // Also decrement the ref count on the volume
 876                     //
 877
 878                     ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
 879
 880                     lCount = InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
 881
 882                     AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 883                                   AFS_TRACE_LEVEL_VERBOSE,
 884                                   "AFSLocateNameEntry Decrement2 count on volume %08lX Cnt %d\n",
 885                                   pCurrentVolume,
 886                                   pCurrentVolume->VolumeReferenceCount);
 887
 888                     ntStatus = AFSBuildMountPointTarget( AuthGroup,
 889                                                          pDirEntry,
 890                                                          &pCurrentVolume);
 891
 892                     if( !NT_SUCCESS( ntStatus))
 893                     {
 894
 895                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 896                                       AFS_TRACE_LEVEL_ERROR,
 897                                       "AFSLocateNameEntry (FO: %08lX) Failed to build MP target for parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 898                                       FileObject,
 899                                       &pDirEntry->NameInformation.FileName,
 900                                       pCurrentObject->FileId.Cell,
 901                                       pCurrentObject->FileId.Volume,
 902                                       pCurrentObject->FileId.Vnode,
 903                                       pCurrentObject->FileId.Unique,
 904                                       ntStatus);
 905
 906                         //
 907                         // We already decremented the current volume above
 908                         //
 909
 910                         bReleaseCurrentVolume = FALSE;
 911
 912                         try_return( ntStatus);
 913                     }
 914
 915                     ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
 916
 917                     //
 918                     // The name array stores both the mount point and the target.
 919                     // Insert the target.
 920                     //
 921
 922                     AFSInsertNextElement( pNameArray,
 923                                           pCurrentVolume->DirectoryCB);
 924
 925                     //
 926                     // We want to restart processing here on the new parent ...
 927                     // Deref and ref count the entries
 928                     //
 929
 930                     lCount = InterlockedDecrement( &pDirEntry->OpenReferenceCount);
 931
 932                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 933                                   AFS_TRACE_LEVEL_VERBOSE,
 934                                   "AFSLocateNameEntry Decrement3 count on %wZ DE %p Ccb %p Cnt %d\n",
 935                                   &pDirEntry->NameInformation.FileName,
 936                                   pDirEntry,
 937                                   NULL,
 938                                   lCount);
 939
 940                     pDirEntry = pCurrentVolume->DirectoryCB;
 941
 942                     lCount = InterlockedIncrement( &pDirEntry->OpenReferenceCount);
 943
 944                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 945                                   AFS_TRACE_LEVEL_VERBOSE,
 946                                   "AFSLocateNameEntry Increment3 count on %wZ DE %p Ccb %p Cnt %d\n",
 947                                   &pDirEntry->NameInformation.FileName,
 948                                   pDirEntry,
 949                                   NULL,
 950                                   lCount);
 951
 952                     pParentDirEntry = NULL;
 953
 954                     //
 955                     // Increment our link count
 956                     //
 957
 958                     lCount = InterlockedIncrement( &pNameArray->LinkCount);
 959
 960                     continue;
 961                 }
 962
 963                 case AFS_FILE_TYPE_DFSLINK:
 964                 {
 965
 966                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_DFS_LINK_EVAL))
 967                     {
 968
 969                         //
 970                         // Pass back the directory entries
 971                         //
 972
 973                         *ParentDirectoryCB = pParentDirEntry;
 974
 975                         *DirectoryCB = pDirEntry;
 976
 977                         *VolumeCB = pCurrentVolume;
 978
 979                         *RootPathName = uniFullPathName;
 980
 981                         try_return( ntStatus);
 982                     }
 983
 984                     //
 985                     // This is a DFS link so we need to update the file name and return STATUS_REPARSE to the
 986                     // system for it to reevaluate it
 987                     //
 988
 989                     if( FileObject != NULL)
 990                     {
 991
 992                         ntStatus = AFSProcessDFSLink( pDirEntry,
 993                                                       FileObject,
 994                                                       &uniRemainingPath,
 995                                                       AuthGroup);
 996                     }
 997                     else
 998                     {
 999
1000                         //
1001                         // This is where we have been re-entered from an NP evaluation call via the BuildBranch()
1002                         // routine.
1003                         //
1004
1005                         ntStatus = STATUS_INVALID_PARAMETER;
1006                     }
1007
1008                     if( ntStatus != STATUS_SUCCESS &&
1009                         ntStatus != STATUS_REPARSE)
1010                     {
1011
1012                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1013                                       AFS_TRACE_LEVEL_ERROR,
1014                                       "AFSLocateNameEntry (FO: %08lX) Failed to process DFSLink parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1015                                       FileObject,
1016                                       &pDirEntry->NameInformation.FileName,
1017                                       pCurrentObject->FileId.Cell,
1018                                       pCurrentObject->FileId.Volume,
1019                                       pCurrentObject->FileId.Vnode,
1020                                       pCurrentObject->FileId.Unique,
1021                                       ntStatus);
1022                     }
1023
1024                     try_return( ntStatus);
1025                 }
1026
1027                 case AFS_FILE_TYPE_UNKNOWN:
1028                 case AFS_FILE_TYPE_INVALID:
1029                 {
1030
1031                     //
1032                     // Something was not processed ...
1033                     //
1034
1035                     try_return( ntStatus = STATUS_ACCESS_DENIED);
1036                 }
1037
1038             }   /* end of switch */
1039
1040             //
1041             // If the parent is not initialized then do it now
1042             //
1043
1044             if( pCurrentObject->FileType == AFS_FILE_TYPE_DIRECTORY &&
1045                 !BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
1046             {
1047
1048                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1049                               AFS_TRACE_LEVEL_VERBOSE,
1050                               "AFSLocateNameEntry (FO: %08lX) Enumerating parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1051                               FileObject,
1052                               &pDirEntry->NameInformation.FileName,
1053                               pCurrentObject->FileId.Cell,
1054                               pCurrentObject->FileId.Volume,
1055                               pCurrentObject->FileId.Vnode,
1056                               pCurrentObject->FileId.Unique);
1057
1058                 AFSAcquireExcl( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock,
1059                                 TRUE);
1060
1061                 if( !BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
1062                 {
1063
1064                     ntStatus = AFSEnumerateDirectory( AuthGroup,
1065                                                       pCurrentObject,
1066                                                       TRUE);
1067
1068                     if( !NT_SUCCESS( ntStatus))
1069                     {
1070
1071                         AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1072
1073                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1074                                       AFS_TRACE_LEVEL_ERROR,
1075                                       "AFSLocateNameEntry (FO: %08lX) Failed to enumerate parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1076                                       FileObject,
1077                                       &pDirEntry->NameInformation.FileName,
1078                                       pCurrentObject->FileId.Cell,
1079                                       pCurrentObject->FileId.Volume,
1080                                       pCurrentObject->FileId.Vnode,
1081                                       pCurrentObject->FileId.Unique,
1082                                       ntStatus);
1083
1084                         try_return( ntStatus);
1085                     }
1086
1087                     SetFlag( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED);
1088                 }
1089
1090                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1091             }
1092             else if( pCurrentObject->FileType == AFS_FILE_TYPE_FILE)
1093             {
1094
1095                 if( uniPathName.Length > 0)
1096                 {
1097
1098                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1099                                   AFS_TRACE_LEVEL_ERROR,
1100                                   "AFSLocateNameEntry (FO: %08lX) Encountered file node %wZ FID %08lX-%08lX-%08lX-%08lX in path processing\n",
1101                                   FileObject,
1102                                   &pDirEntry->NameInformation.FileName,
1103                                   pCurrentObject->FileId.Cell,
1104                                   pCurrentObject->FileId.Volume,
1105                                   pCurrentObject->FileId.Vnode,
1106                                   pCurrentObject->FileId.Unique);
1107
1108                     // The proper error code to return would be STATUS_OBJECT_PATH_INVALID because
1109                     // one of the components of the path is not a directory.  However, returning
1110                     // that error prevents IIS 7 and 7.5 from being able to serve data out of AFS.
1111                     // Instead IIS insists on treating the target file as if it is a directory containing
1112                     // a potential web.config file.  NTFS and LanMan return STATUS_OBJECT_PATH_NOT_FOUND.
1113                     // AFS will follow suit.
1114
1115                     ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1116                 }
1117                 else
1118                 {
1119
1120                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1121                                   AFS_TRACE_LEVEL_VERBOSE,
1122                                   "AFSLocateNameEntry (FO: %08lX) Returning file %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1123                                   FileObject,
1124                                   &pDirEntry->NameInformation.FileName,
1125                                   pCurrentObject->FileId.Cell,
1126                                   pCurrentObject->FileId.Volume,
1127                                   pCurrentObject->FileId.Vnode,
1128                                   pCurrentObject->FileId.Unique);
1129
1130                     //
1131                     // Pass back the directory entries
1132                     //
1133
1134                     *ParentDirectoryCB = pParentDirEntry;
1135
1136                     *DirectoryCB = pDirEntry;
1137
1138                     *VolumeCB = pCurrentVolume;
1139
1140                     *RootPathName = uniFullPathName;
1141                 }
1142
1143                 try_return( ntStatus);
1144             }
1145
1146             //
1147             // If we are at the end of the processing, set our returned information and get out
1148             //
1149
1150             if( uniPathName.Length == 0)
1151             {
1152
1153                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1154                               AFS_TRACE_LEVEL_VERBOSE,
1155                               "AFSLocateNameEntry (FO: %08lX) Completed processing returning %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1156                               FileObject,
1157                               &pDirEntry->NameInformation.FileName,
1158                               pCurrentObject->FileId.Cell,
1159                               pCurrentObject->FileId.Volume,
1160                               pCurrentObject->FileId.Vnode,
1161                               pCurrentObject->FileId.Unique);
1162
1163                 //
1164                 // Pass back the directory entries
1165                 //
1166
1167                 *ParentDirectoryCB = pParentDirEntry;
1168
1169                 *DirectoryCB = pDirEntry;
1170
1171                 *VolumeCB = pCurrentVolume;
1172
1173                 *RootPathName = uniFullPathName;
1174
1175                 try_return( ntStatus);
1176             }
1177
1178             //
1179             // We may have returned to the top of the while( TRUE)
1180             //
1181             if( bSubstituteName &&
1182                 uniSearchName.Buffer != NULL)
1183             {
1184
1185                 AFSExFreePoolWithTag( uniSearchName.Buffer, 0);
1186
1187                 bSubstituteName = FALSE;
1188
1189                 uniSearchName.Length = uniSearchName.MaximumLength = 0;
1190                 uniSearchName.Buffer = NULL;
1191             }
1192
1193             ulSubstituteIndex = 1;
1194
1195             ntStatus = STATUS_SUCCESS;
1196
1197             //
1198             // Get the next component name
1199             //
1200
1201             FsRtlDissectName( uniPathName,
1202                               &uniComponentName,
1203                               &uniRemainingPath);
1204
1205             //
1206             // Check for the . and .. in the path
1207             //
1208
1209             if( RtlCompareUnicodeString( &uniComponentName,
1210                                          &uniNoOpName,
1211                                          TRUE) == 0)
1212             {
1213
1214                 uniPathName = uniRemainingPath;
1215
1216                 continue;
1217             }
1218
1219             if( RtlCompareUnicodeString( &uniComponentName,
1220                                          &uniRelativeName,
1221                                          TRUE) == 0)
1222             {
1223
1224                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1225                               AFS_TRACE_LEVEL_VERBOSE,
1226                               "AFSLocateNameEntry (FO: %08lX) Backing up entry from %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1227                               FileObject,
1228                               &pDirEntry->NameInformation.FileName,
1229                               pCurrentObject->FileId.Cell,
1230                               pCurrentObject->FileId.Volume,
1231                               pCurrentObject->FileId.Vnode,
1232                               pCurrentObject->FileId.Unique);
1233
1234                 //
1235                 // Need to back up one entry in the name array
1236                 //
1237                 lCount = InterlockedDecrement( &pDirEntry->OpenReferenceCount);
1238
1239                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1240                               AFS_TRACE_LEVEL_VERBOSE,
1241                               "AFSLocateNameEntry Decrement4 count on %wZ DE %p Ccb %p Cnt %d\n",
1242                               &pDirEntry->NameInformation.FileName,
1243                               pDirEntry,
1244                               NULL,
1245                               lCount);
1246
1247                 pDirEntry = AFSBackupEntry( NameArray);
1248
1249                 if( pDirEntry == NULL)
1250                 {
1251
1252                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1253                                   AFS_TRACE_LEVEL_ERROR,
1254                                   "AFSLocateNameEntry AFSBackupEntry failed\n");
1255
1256                     try_return(ntStatus = STATUS_OBJECT_PATH_INVALID);
1257                 }
1258
1259                 lCount = InterlockedIncrement( &pDirEntry->OpenReferenceCount);
1260
1261                 if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_ROOT_VOLUME))
1262                 {
1263
1264                     pParentDirEntry = NULL;
1265                 }
1266                 else
1267                 {
1268
1269                     pParentDirEntry = AFSGetParentEntry( pNameArray);
1270
1271                     ASSERT( pParentDirEntry != pDirEntry);
1272                 }
1273
1274                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1275                               AFS_TRACE_LEVEL_VERBOSE,
1276                               "AFSLocateNameEntry Increment4 count on %wZ DE %p Ccb %p Cnt %d\n",
1277                               &pDirEntry->NameInformation.FileName,
1278                               pDirEntry,
1279                               NULL,
1280                               pDirEntry->OpenReferenceCount);
1281
1282                 uniPathName = uniRemainingPath;
1283
1284                 continue;
1285             }
1286
1287             //
1288             // Update our pointers
1289             //
1290
1291             pParentDirEntry = pDirEntry;
1292
1293             pDirEntry = NULL;
1294
1295             uniSearchName = uniComponentName;
1296
1297             while( pDirEntry == NULL)
1298             {
1299
1300                 //
1301                 // If the SearchName contains @SYS then we perform the substitution.
1302                 // If there is no substitution we give up.
1303                 //
1304
1305                 if( !bSubstituteName &&
1306                     FsRtlIsNameInExpression( &uniSysName,
1307                                              &uniSearchName,
1308                                              TRUE,
1309                                              NULL))
1310                 {
1311
1312                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1313                                   AFS_TRACE_LEVEL_VERBOSE_2,
1314                                   "AFSLocateNameEntry (FO: %08lX) Processing @SYS substitution for %wZ Index %08lX\n",
1315                                   FileObject,
1316                                   &uniComponentName,
1317                                   ulSubstituteIndex);
1318
1319                     ntStatus = AFSSubstituteSysName( &uniComponentName,
1320                                                      &uniSearchName,
1321                                                      ulSubstituteIndex);
1322
1323                     if ( NT_SUCCESS( ntStatus))
1324                     {
1325
1326                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1327                                       AFS_TRACE_LEVEL_VERBOSE_2,
1328                                       "AFSLocateNameEntry (FO: %08lX) Located substitution %wZ for %wZ Index %08lX\n",
1329                                       FileObject,
1330                                       &uniSearchName,
1331                                       &uniComponentName,
1332                                       ulSubstituteIndex);
1333
1334                         //
1335                         // Go reparse the name again
1336                         //
1337
1338                         bSubstituteName = TRUE;
1339
1340                         ulSubstituteIndex++; // For the next entry, if needed
1341
1342                         continue;   // while( pDirEntry == NULL)
1343                     }
1344                     else
1345                     {
1346
1347                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1348                                       AFS_TRACE_LEVEL_ERROR,
1349                                       "AFSLocateNameEntry (FO: %08lX) Failed to locate substitute string for %wZ Index %08lX Status %08lX\n",
1350                                       FileObject,
1351                                       &uniComponentName,
1352                                       ulSubstituteIndex,
1353                                       ntStatus);
1354
1355                         if( ntStatus == STATUS_OBJECT_NAME_NOT_FOUND)
1356                         {
1357
1358                             //
1359                             // Pass back the directory entries
1360                             //
1361
1362                             *ParentDirectoryCB = pParentDirEntry;
1363
1364                             *DirectoryCB = NULL;
1365
1366                             *VolumeCB = pCurrentVolume;
1367
1368                             if( ComponentName != NULL)
1369                             {
1370
1371                                 *ComponentName = uniComponentName;
1372                             }
1373
1374                             *RootPathName = uniFullPathName;
1375                         }
1376
1377                         //
1378                         // We can't possibly have a pDirEntry since the lookup failed
1379                         //
1380                         try_return( ntStatus);
1381                     }
1382                 }
1383
1384                 //
1385                 // Generate the CRC on the node and perform a case sensitive lookup
1386                 //
1387
1388                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1389                               AFS_TRACE_LEVEL_VERBOSE_2,
1390                               "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ case sensitive\n",
1391                               FileObject,
1392                               &uniSearchName);
1393
1394                 ulCRC = AFSGenerateCRC( &uniSearchName,
1395                                         FALSE);
1396
1397                 AFSAcquireShared( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
1398                                   TRUE);
1399
1400                 AFSLocateCaseSensitiveDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
1401                                                 ulCRC,
1402                                                 &pDirEntry);
1403
1404                 if( pDirEntry == NULL)
1405                 {
1406
1407                     //
1408                     // Missed so perform a case insensitive lookup
1409                     //
1410
1411                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1412                                   AFS_TRACE_LEVEL_VERBOSE_2,
1413                                   "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ case insensitive\n",
1414                                   FileObject,
1415                                   &uniSearchName);
1416
1417                     ulCRC = AFSGenerateCRC( &uniSearchName,
1418                                             TRUE);
1419
1420                     AFSLocateCaseInsensitiveDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
1421                                                       ulCRC,
1422                                                       &pDirEntry);
1423
1424                     if( pDirEntry == NULL)
1425                     {
1426
1427                         //
1428                         // OK, if this component is a valid short name then try
1429                         // a lookup in the short name tree
1430                         //
1431
1432                         if( !BooleanFlagOn( pDevExt->DeviceFlags, AFS_DEVICE_FLAG_DISABLE_SHORTNAMES) &&
1433                             RtlIsNameLegalDOS8Dot3( &uniSearchName,
1434                                                     NULL,
1435                                                     NULL))
1436                         {
1437
1438                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1439                                           AFS_TRACE_LEVEL_VERBOSE_2,
1440                                           "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ short name\n",
1441                                           FileObject,
1442                                           &uniSearchName);
1443
1444                             AFSLocateShortNameDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.ShortNameTree,
1445                                                         ulCRC,
1446                                                         &pDirEntry);
1447                         }
1448
1449                         if( pDirEntry == NULL)
1450                         {
1451
1452                             //
1453                             // If we substituted a name then reset our search name and try again
1454                             //
1455
1456                             if( bSubstituteName)
1457                             {
1458
1459                                 AFSExFreePoolWithTag( uniSearchName.Buffer, 0);
1460
1461                                 uniSearchName = uniComponentName;
1462
1463                                 bSubstituteName = FALSE;
1464
1465                                 AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1466
1467                                 continue;       // while( pDirEntry == NULL)
1468                             }
1469
1470                             if( uniRemainingPath.Length > 0)
1471                             {
1472
1473                                 ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1474                             }
1475                             else
1476                             {
1477
1478                                 ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
1479
1480                                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1481                                               AFS_TRACE_LEVEL_VERBOSE,
1482                                               "AFSLocateNameEntry (FO: %08lX) Returning name not found for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1483                                               FileObject,
1484                                               &uniSearchName,
1485                                               pCurrentObject->FileId.Cell,
1486                                               pCurrentObject->FileId.Volume,
1487                                               pCurrentObject->FileId.Vnode,
1488                                               pCurrentObject->FileId.Unique);
1489
1490                                 //
1491                                 // Pass back the directory entries
1492                                 //
1493
1494                                 *ParentDirectoryCB = pParentDirEntry;
1495
1496                                 *DirectoryCB = NULL;
1497
1498                                 *VolumeCB = pCurrentVolume;
1499
1500                                 if( ComponentName != NULL)
1501                                 {
1502
1503                                     *ComponentName = uniComponentName;
1504                                 }
1505
1506                                 *RootPathName = uniFullPathName;
1507                             }
1508
1509                             AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1510
1511                             //
1512                             // Node name not found so get out
1513                             //
1514
1515                             try_return( ntStatus);  // while( pDirEntry == NULL)
1516                         }
1517                     }
1518                     else
1519                     {
1520
1521                         //
1522                         // Here we have a match on the case insensitive lookup for the name. If there
1523                         // Is more than one link entry for this node then fail the lookup request
1524                         //
1525
1526                         if( !BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD) ||
1527                             pDirEntry->CaseInsensitiveList.fLink != NULL)
1528                         {
1529
1530                             AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1531
1532                             try_return(ntStatus = STATUS_OBJECT_NAME_COLLISION);
1533                         }
1534                     }
1535                 }
1536
1537                 if( pDirEntry != NULL)
1538                 {
1539
1540                     //
1541                     // If the verify flag is set on the parent and the current entry is deleted
1542                     // revalidate the parent and search again.
1543                     //
1544
1545                     if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED) &&
1546                         BooleanFlagOn( pParentDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY))
1547                     {
1548
1549                         AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1550
1551                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1552                                       AFS_TRACE_LEVEL_VERBOSE,
1553                                       "AFSLocateNameEntry (FO: %08lX) Verifying(2) parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1554                                       FileObject,
1555                                       &pParentDirEntry->NameInformation.FileName,
1556                                       pParentDirEntry->ObjectInformation->FileId.Cell,
1557                                       pParentDirEntry->ObjectInformation->FileId.Volume,
1558                                       pParentDirEntry->ObjectInformation->FileId.Vnode,
1559                                       pParentDirEntry->ObjectInformation->FileId.Unique);
1560
1561                         //
1562                         // Directory TreeLock should be exclusively held
1563                         //
1564
1565                         AFSAcquireExcl( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
1566                                         TRUE);
1567
1568                         ntStatus = AFSVerifyEntry( AuthGroup,
1569                                                    pParentDirEntry);
1570
1571                         AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1572
1573                         if( !NT_SUCCESS( ntStatus))
1574                         {
1575
1576                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1577                                           AFS_TRACE_LEVEL_ERROR,
1578                                           "AFSLocateNameEntry (FO: %08lX) Failed to verify(2) parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1579                                           FileObject,
1580                                           &pParentDirEntry->NameInformation.FileName,
1581                                           pParentDirEntry->ObjectInformation->FileId.Cell,
1582                                           pParentDirEntry->ObjectInformation->FileId.Volume,
1583                                           pParentDirEntry->ObjectInformation->FileId.Vnode,
1584                                           pParentDirEntry->ObjectInformation->FileId.Unique,
1585                                           ntStatus);
1586
1587                             try_return( ntStatus);
1588                         }
1589
1590                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1591                                       AFS_TRACE_LEVEL_VERBOSE,
1592                                       "AFSLocateNameEntry (FO: %08lX) Reprocessing component %wZ in parent %wZ\n",
1593                                       FileObject,
1594                                       &uniSearchName,
1595                                       &pParentDirEntry->NameInformation.FileName);
1596
1597
1598                         pDirEntry = NULL;
1599
1600                         continue;
1601                     }
1602
1603                     //
1604                     // Increment our dir entry ref count
1605                     //
1606
1607                     lCount = InterlockedIncrement( &pDirEntry->OpenReferenceCount);
1608
1609                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1610                                   AFS_TRACE_LEVEL_VERBOSE,
1611                                   "AFSLocateNameEntry Increment5 count on %wZ DE %p Ccb %p Cnt %d\n",
1612                                   &pDirEntry->NameInformation.FileName,
1613                                   pDirEntry,
1614                                   NULL,
1615                                   lCount);
1616                 }
1617
1618                 AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1619
1620             } // End while( pDirEntry == NULL)
1621
1622             //
1623             // If we have a dirEntry for this component, perform some basic validation on it
1624             //
1625
1626             if( pDirEntry != NULL &&
1627                 BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED))
1628             {
1629
1630                 pCurrentObject = pDirEntry->ObjectInformation;
1631
1632                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1633                               AFS_TRACE_LEVEL_ERROR,
1634                               "AFSLocateNameEntry (FO: %08lX) Deleted entry %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1635                               FileObject,
1636                               &pDirEntry->NameInformation.FileName,
1637                               pCurrentObject->FileId.Cell,
1638                               pCurrentObject->FileId.Volume,
1639                               pCurrentObject->FileId.Vnode,
1640                               pCurrentObject->FileId.Unique);
1641
1642                 //
1643                 // This entry was deleted through the invalidation call back so perform cleanup
1644                 // on the entry
1645                 //
1646
1647                 pParentObjectInfo = pCurrentObject->ParentObjectInformation;
1648
1649                 ASSERT( pParentObjectInfo != NULL);
1650
1651                 AFSAcquireExcl( pParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock,
1652                                 TRUE);
1653
1654                 AFSAcquireExcl( pCurrentObject->VolumeCB->ObjectInfoTree.TreeLock,
1655                                 TRUE);
1656
1657                 lCount = InterlockedDecrement( &pDirEntry->OpenReferenceCount);
1658
1659                 if( lCount == 0)
1660                 {
1661
1662                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING|AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1663                                   AFS_TRACE_LEVEL_VERBOSE,
1664                                   "AFSLocateNameEntry Deleting dir entry %08lX (%08lX) for %wZ\n",
1665                                   pDirEntry,
1666                                   pCurrentObject,
1667                                   &pDirEntry->NameInformation.FileName);
1668
1669                     //
1670                     // Remove and delete the directory entry from the parent list
1671                     //
1672
1673                     AFSDeleteDirEntry( pParentObjectInfo,
1674                                        pDirEntry);
1675
1676                     AFSAcquireShared( &pCurrentObject->NonPagedInfo->ObjectInfoLock,
1677                                       TRUE);
1678
1679                     if( pCurrentObject->ObjectReferenceCount <= 0)
1680                     {
1681
1682                         if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_INSERTED_HASH_TREE))
1683                         {
1684
1685                             AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1686                                           AFS_TRACE_LEVEL_VERBOSE,
1687                                           "AFSLocateNameEntry Removing object %08lX from volume tree\n",
1688                                           pCurrentObject);
1689
1690                             AFSRemoveHashEntry( &pCurrentObject->VolumeCB->ObjectInfoTree.TreeHead,
1691                                                 &pCurrentObject->TreeEntry);
1692
1693                             ClearFlag( pCurrentObject->Flags, AFS_OBJECT_INSERTED_HASH_TREE);
1694                         }
1695                     }
1696
1697                     AFSReleaseResource( &pCurrentObject->NonPagedInfo->ObjectInfoLock);
1698                 }
1699                 else
1700                 {
1701
1702                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1703                                   AFS_TRACE_LEVEL_VERBOSE,
1704                                   "AFSLocateNameEntry Setting DELETE flag in dir entry %p for %wZ\n",
1705                                   pDirEntry,
1706                                   &pDirEntry->NameInformation.FileName);
1707
1708                     SetFlag( pDirEntry->Flags, AFS_DIR_ENTRY_DELETED);
1709
1710                     AFSRemoveNameEntry( pParentObjectInfo,
1711                                         pDirEntry);
1712                 }
1713
1714                 AFSReleaseResource( pParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
1715
1716                 AFSReleaseResource( pCurrentObject->VolumeCB->ObjectInfoTree.TreeLock);
1717
1718                 //
1719                 // We deleted the dir entry so check if there is any remaining portion
1720                 // of the name to process.
1721                 //
1722
1723                 if( uniRemainingPath.Length > 0)
1724                 {
1725                     ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1726                 }
1727                 else
1728                 {
1729
1730                     ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
1731
1732                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1733                                   AFS_TRACE_LEVEL_VERBOSE,
1734                                   "AFSLocateNameEntry (FO: %08lX) Returning name not found(2) for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1735                                   FileObject,
1736                                   &uniComponentName,
1737                                   pCurrentObject->FileId.Cell,
1738                                   pCurrentObject->FileId.Volume,
1739                                   pCurrentObject->FileId.Vnode,
1740                                   pCurrentObject->FileId.Unique);
1741
1742                     //
1743                     // Pass back the directory entries
1744                     //
1745
1746                     *ParentDirectoryCB = pParentDirEntry;
1747
1748                     *DirectoryCB = NULL;
1749
1750                     *VolumeCB = pCurrentVolume;
1751
1752                     if( ComponentName != NULL)
1753                     {
1754
1755                         *ComponentName = uniComponentName;
1756                     }
1757
1758                     *RootPathName = uniFullPathName;
1759                 }
1760             }
1761
1762             if( ntStatus != STATUS_SUCCESS)
1763             {
1764
1765                 try_return( ntStatus);
1766             }
1767
1768             //
1769             // Decrement the previous parent
1770             //
1771
1772             lCount = InterlockedDecrement( &pParentDirEntry->OpenReferenceCount);
1773
1774             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1775                           AFS_TRACE_LEVEL_VERBOSE,
1776                           "AFSLocateNameEntry Decrement5 count on Parent %wZ DE %p Ccb %p Cnt %d\n",
1777                           &pParentDirEntry->NameInformation.FileName,
1778                           pParentDirEntry,
1779                           NULL,
1780                           lCount);
1781
1782             //
1783             // If we ended up substituting a name in the component then update
1784             // the full path and update the pointers
1785             //
1786
1787             if( bSubstituteName)
1788             {
1789
1790                 BOOLEAN bRelativeOpen = FALSE;
1791
1792                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1793                               AFS_TRACE_LEVEL_VERBOSE_2,
1794                               "AFSLocateNameEntry (FO: %08lX) Substituting %wZ into %wZ Index %08lX\n",
1795                               FileObject,
1796                               &uniSearchName,
1797                               &uniComponentName,
1798                               ulSubstituteIndex);
1799
1800                 if( FileObject != NULL &&
1801                     FileObject->RelatedFileObject != NULL)
1802                 {
1803
1804                     bRelativeOpen = TRUE;
1805                 }
1806
1807                 //
1808                 // AFSSubstituteNameInPath will replace the uniFullPathName.Buffer
1809                 // and free the prior Buffer contents but only if the fourth
1810                 // parameter is TRUE.
1811                 //
1812
1813                 ntStatus = AFSSubstituteNameInPath( &uniFullPathName,
1814                                                     &uniComponentName,
1815                                                     &uniSearchName,
1816                                                     &uniRemainingPath,
1817                                                     bRelativeOpen ||
1818                                                             bAllocatedSymLinkBuffer ||
1819                                                             bSubstitutedName);
1820
1821                 if( !NT_SUCCESS( ntStatus))
1822                 {
1823
1824                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1825                                   AFS_TRACE_LEVEL_ERROR,
1826                                   "AFSLocateNameEntry (FO: %08lX) Failure to substitute %wZ into %wZ Index %08lX Status %08lX\n",
1827                                   FileObject,
1828                                   &uniSearchName,
1829                                   &uniComponentName,
1830                                   ulSubstituteIndex,
1831                                   ntStatus);
1832
1833                     try_return( ntStatus);
1834                 }
1835
1836                 //
1837                 // We have substituted a name into the buffer so if we do this again for this
1838                 // path, we need to free up the buffer we allocated.
1839                 //
1840
1841                 bSubstitutedName = TRUE;
1842             }
1843
1844             //
1845             // Update the search parameters
1846             //
1847
1848             uniPathName = uniRemainingPath;
1849
1850             //
1851             // Check if the is a SymLink entry but has no Target FileID or Name. In this
1852             // case it might be a DFS Link so let's go and evaluate it to be sure
1853             //
1854
1855             if( pCurrentObject->FileType == AFS_FILE_TYPE_SYMLINK &&
1856                 pCurrentObject->TargetFileId.Vnode == 0 &&
1857                 pCurrentObject->TargetFileId.Unique == 0 &&
1858                 pDirEntry->NameInformation.TargetName.Length == 0)
1859             {
1860
1861                 ntStatus = AFSValidateSymLink( AuthGroup,
1862                                                pDirEntry);
1863
1864                 if( !NT_SUCCESS( ntStatus))
1865                 {
1866
1867                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1868                                   AFS_TRACE_LEVEL_ERROR,
1869                                   "AFSLocateNameEntry (FO: %08lX) Failed to evaluate possible DFS Link %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1870                                   FileObject,
1871                                   &pDirEntry->NameInformation.FileName,
1872                                   pCurrentObject->FileId.Cell,
1873                                   pCurrentObject->FileId.Volume,
1874                                   pCurrentObject->FileId.Vnode,
1875                                   pCurrentObject->FileId.Unique,
1876                                   ntStatus);
1877
1878                     try_return( ntStatus);
1879                 }
1880             }
1881
1882             //
1883             // Update the name array
1884             //
1885
1886             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1887                           AFS_TRACE_LEVEL_VERBOSE,
1888                           "AFSLocateNameEntry (FO: %08lX) Inserting name array entry %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1889                           FileObject,
1890                           &pDirEntry->NameInformation.FileName,
1891                           pCurrentObject->FileId.Cell,
1892                           pCurrentObject->FileId.Volume,
1893                           pCurrentObject->FileId.Vnode,
1894                           pCurrentObject->FileId.Unique);
1895
1896             ntStatus = AFSInsertNextElement( pNameArray,
1897                                              pDirEntry);
1898
1899             if( !NT_SUCCESS( ntStatus))
1900             {
1901
1902                 try_return( ntStatus);
1903             }
1904         }       // while (TRUE)
1905
1906 try_exit:
1907
1908         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1909                       AFS_TRACE_LEVEL_VERBOSE,
1910                       "AFSLocateNameEntry (FO: %08lX) Completed processing %wZ Status %08lX\n",
1911                       FileObject,
1912                       RootPathName,
1913                       ntStatus);
1914
1915         if( ( !NT_SUCCESS( ntStatus) &&
1916               ntStatus != STATUS_OBJECT_NAME_NOT_FOUND) ||
1917             ntStatus == STATUS_REPARSE)
1918         {
1919
1920             if( pDirEntry != NULL)
1921             {
1922
1923                 lCount = InterlockedDecrement( &pDirEntry->OpenReferenceCount);
1924
1925                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1926                               AFS_TRACE_LEVEL_VERBOSE,
1927                               "AFSLocateNameEntry Decrement6 count on %wZ DE %p Ccb %p Cnt %d\n",
1928                               &pDirEntry->NameInformation.FileName,
1929                               pDirEntry,
1930                               NULL,
1931                               lCount);
1932             }
1933             else if( pParentDirEntry != NULL)
1934             {
1935
1936                 lCount = InterlockedDecrement( &pParentDirEntry->OpenReferenceCount);
1937
1938                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1939                               AFS_TRACE_LEVEL_VERBOSE,
1940                               "AFSLocateNameEntry Decrement7 count on %wZ DE %p Ccb %p Cnt %d\n",
1941                               &pParentDirEntry->NameInformation.FileName,
1942                               pParentDirEntry,
1943                               NULL,
1944                               lCount);
1945             }
1946
1947             if( bReleaseCurrentVolume)
1948             {
1949
1950                 ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
1951
1952                 lCount = InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
1953
1954                 AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
1955                               AFS_TRACE_LEVEL_VERBOSE,
1956                               "AFSLocateNameEntry Decrement3 count on volume %08lX Cnt %d\n",
1957                               pCurrentVolume,
1958                               lCount);
1959             }
1960
1961             if( RootPathName->Buffer != uniFullPathName.Buffer)
1962             {
1963
1964                 AFSExFreePoolWithTag( uniFullPathName.Buffer, 0);
1965             }
1966         }
1967         else
1968         {
1969
1970             if( *ParentDirectoryCB != NULL)
1971             {
1972
1973                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1974                               AFS_TRACE_LEVEL_VERBOSE,
1975                               "AFSLocateNameEntry Count on Parent %wZ DE %p Ccb %p Cnt %d\n",
1976                               &(*ParentDirectoryCB)->NameInformation.FileName,
1977                               *ParentDirectoryCB,
1978                               NULL,
1979                               (*ParentDirectoryCB)->OpenReferenceCount);
1980             }
1981
1982             if( *DirectoryCB != NULL)
1983             {
1984
1985                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1986                               AFS_TRACE_LEVEL_VERBOSE,
1987                               "AFSLocateNameEntry Count on %wZ DE %p Ccb %p Cnt %d\n",
1988                               &(*DirectoryCB)->NameInformation.FileName,
1989                               *DirectoryCB,
1990                               NULL,
1991                               (*DirectoryCB)->OpenReferenceCount);
1992             }
1993         }
1994
1995         if( bSubstituteName &&
1996             uniSearchName.Buffer != NULL)
1997         {
1998
1999             AFSExFreePoolWithTag( uniSearchName.Buffer, 0);
2000         }
2001     }
2002
2003     return ntStatus;
2004 }
2005
2006 NTSTATUS
2007 AFSCreateDirEntry( IN GUID            *AuthGroup,
2008                    IN AFSObjectInfoCB *ParentObjectInfo,
2009                    IN AFSDirectoryCB *ParentDirCB,
2010                    IN PUNICODE_STRING FileName,
2011                    IN PUNICODE_STRING ComponentName,
2012                    IN ULONG Attributes,
2013                    IN OUT AFSDirectoryCB **DirEntry)
2014 {
2015
2016     NTSTATUS ntStatus = STATUS_SUCCESS;
2017     AFSDirectoryCB *pDirNode = NULL, *pExistingDirNode = NULL;
2018     UNICODE_STRING uniShortName;
2019     LARGE_INTEGER liFileSize = {0,0};
2020     LONG lCount;
2021
2022     __Enter
2023     {
2024
2025         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2026                       AFS_TRACE_LEVEL_VERBOSE_2,
2027                       "AFSCreateDirEntry Creating dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ Attribs %08lX\n",
2028                       &ParentDirCB->NameInformation.FileName,
2029                       ParentObjectInfo->FileId.Cell,
2030                       ParentObjectInfo->FileId.Volume,
2031                       ParentObjectInfo->FileId.Vnode,
2032                       ParentObjectInfo->FileId.Unique,
2033                       ComponentName,
2034                       Attributes);
2035
2036         //
2037         // OK, before inserting the node into the parent tree, issue
2038         // the request to the service for node creation
2039         // We will need to drop the lock on the parent node since the create
2040         // could cause a callback into the file system to invalidate it's cache
2041         //
2042
2043         ntStatus = AFSNotifyFileCreate( AuthGroup,
2044                                         ParentObjectInfo,
2045                                         &liFileSize,
2046                                         Attributes,
2047                                         ComponentName,
2048                                         &pDirNode);
2049
2050         //
2051         // If the returned status is STATUS_REPARSE then the entry exists
2052         // and we raced, get out.
2053
2054         if( ntStatus == STATUS_REPARSE)
2055         {
2056
2057             *DirEntry = pDirNode;
2058
2059             try_return( ntStatus = STATUS_SUCCESS);
2060         }
2061
2062         if( !NT_SUCCESS( ntStatus))
2063         {
2064
2065             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2066                           AFS_TRACE_LEVEL_ERROR,
2067                           "AFSCreateDirEntry Failed to create dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ Attribs %08lX Status %08lX\n",
2068                           &ParentDirCB->NameInformation.FileName,
2069                           ParentObjectInfo->FileId.Cell,
2070                           ParentObjectInfo->FileId.Volume,
2071                           ParentObjectInfo->FileId.Vnode,
2072                           ParentObjectInfo->FileId.Unique,
2073                           ComponentName,
2074                           Attributes,
2075                           ntStatus);
2076
2077             try_return( ntStatus);
2078         }
2079
2080         AFSAcquireExcl( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock,
2081                         TRUE);
2082
2083         //
2084         // Before attempting to insert the new entry, check if we need to validate the parent
2085         //
2086
2087         if( BooleanFlagOn( ParentObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY))
2088         {
2089
2090             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2091                           AFS_TRACE_LEVEL_VERBOSE,
2092                           "AFSCreateDirEntry Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2093                           &ParentDirCB->NameInformation.FileName,
2094                           ParentObjectInfo->FileId.Cell,
2095                           ParentObjectInfo->FileId.Volume,
2096                           ParentObjectInfo->FileId.Vnode,
2097                           ParentObjectInfo->FileId.Unique);
2098
2099             ntStatus = AFSVerifyEntry( AuthGroup,
2100                                        ParentDirCB);
2101
2102             if( !NT_SUCCESS( ntStatus))
2103             {
2104
2105                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2106                               AFS_TRACE_LEVEL_ERROR,
2107                               "AFSCreateDirEntry Failed to verify parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
2108                               &ParentDirCB->NameInformation.FileName,
2109                               ParentObjectInfo->FileId.Cell,
2110                               ParentObjectInfo->FileId.Volume,
2111                               ParentObjectInfo->FileId.Vnode,
2112                               ParentObjectInfo->FileId.Unique,
2113                               ntStatus);
2114
2115                 AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2116
2117                 try_return( ntStatus);
2118             }
2119         }
2120
2121         //
2122         // Check for the entry in the event we raced with some other thread
2123         //
2124
2125         AFSLocateCaseSensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
2126                                         (ULONG)pDirNode->CaseSensitiveTreeEntry.HashIndex,
2127                                         &pExistingDirNode);
2128
2129         if( pExistingDirNode != NULL)
2130         {
2131             if (AFSIsEqualFID( &pDirNode->ObjectInformation->FileId,
2132                                &pExistingDirNode->ObjectInformation->FileId))
2133             {
2134
2135                 AFSDeleteDirEntry( ParentObjectInfo,
2136                                    pDirNode);
2137
2138                 lCount = InterlockedIncrement( &pExistingDirNode->OpenReferenceCount);
2139
2140                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
2141                               AFS_TRACE_LEVEL_VERBOSE,
2142                               "AFSCreateDirEntry Increment count on %wZ DE %p Cnt %d\n",
2143                               &pExistingDirNode->NameInformation.FileName,
2144                               pExistingDirNode,
2145                               lCount);
2146
2147                 *DirEntry = pExistingDirNode;
2148
2149                 AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2150
2151                 try_return( ntStatus = STATUS_SUCCESS);
2152             }
2153             else
2154             {
2155
2156                 //
2157                 // Need to tear down this entry and rebuild it below
2158                 //
2159
2160                 if( pExistingDirNode->OpenReferenceCount == 0)
2161                 {
2162
2163                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2164                                   AFS_TRACE_LEVEL_VERBOSE,
2165                                   "AFSCreateDirEntry Different FIDs - Deleting DE %p for %wZ Old FID %08lX-%08lX-%08lX-%08lX New FID %08lX-%08lX-%08lX-%08lX\n",
2166                                   pExistingDirNode,
2167                                   &pExistingDirNode->NameInformation.FileName,
2168                                   pExistingDirNode->ObjectInformation->FileId.Cell,
2169                                   pExistingDirNode->ObjectInformation->FileId.Volume,
2170                                   pExistingDirNode->ObjectInformation->FileId.Vnode,
2171                                   pExistingDirNode->ObjectInformation->FileId.Unique,
2172                                   pDirNode->ObjectInformation->FileId.Cell,
2173                                   pDirNode->ObjectInformation->FileId.Volume,
2174                                   pDirNode->ObjectInformation->FileId.Vnode,
2175                                   pDirNode->ObjectInformation->FileId.Unique);
2176
2177                     AFSDeleteDirEntry( ParentObjectInfo,
2178                                        pExistingDirNode);
2179                 }
2180                 else
2181                 {
2182
2183                     SetFlag( pExistingDirNode->Flags, AFS_DIR_ENTRY_DELETED);
2184
2185                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2186                                   AFS_TRACE_LEVEL_VERBOSE,
2187                                   "AFSCreateDirEntry Different FIDs - Removing DE %p for %wZ Old FID %08lX-%08lX-%08lX-%08lX New FID %08lX-%08lX-%08lX-%08lX\n",
2188                                   pExistingDirNode,
2189                                   &pExistingDirNode->NameInformation.FileName,
2190                                   pExistingDirNode->ObjectInformation->FileId.Cell,
2191                                   pExistingDirNode->ObjectInformation->FileId.Volume,
2192                                   pExistingDirNode->ObjectInformation->FileId.Vnode,
2193                                   pExistingDirNode->ObjectInformation->FileId.Unique,
2194                                   pDirNode->ObjectInformation->FileId.Cell,
2195                                   pDirNode->ObjectInformation->FileId.Volume,
2196                                   pDirNode->ObjectInformation->FileId.Vnode,
2197                                   pDirNode->ObjectInformation->FileId.Unique);
2198
2199                     AFSRemoveNameEntry( ParentObjectInfo,
2200                                         pExistingDirNode);
2201                 }
2202
2203             }
2204         }
2205
2206         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2207                       AFS_TRACE_LEVEL_VERBOSE_2,
2208                       "AFSCreateDirEntry Inserting dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ\n",
2209                       &ParentDirCB->NameInformation.FileName,
2210                       ParentObjectInfo->FileId.Cell,
2211                       ParentObjectInfo->FileId.Volume,
2212                       ParentObjectInfo->FileId.Vnode,
2213                       ParentObjectInfo->FileId.Unique,
2214                       ComponentName);
2215
2216         //
2217         // Insert the directory node
2218         //
2219
2220         AFSInsertDirectoryNode( ParentObjectInfo,
2221                                 pDirNode,
2222                                 TRUE);
2223
2224         lCount = InterlockedIncrement( &pDirNode->OpenReferenceCount);
2225
2226         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
2227                       AFS_TRACE_LEVEL_VERBOSE,
2228                       "AFSCreateDirEntry Increment2 count on %wZ DE %p Cnt %d\n",
2229                       &pDirNode->NameInformation.FileName,
2230                       pDirNode,
2231                       lCount);
2232
2233         //
2234         // Pass back the dir entry
2235         //
2236
2237         *DirEntry = pDirNode;
2238
2239         AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2240
2241 try_exit:
2242
2243         NOTHING;
2244     }
2245
2246     return ntStatus;
2247 }
2248
2249 void
2250 AFSInsertDirectoryNode( IN AFSObjectInfoCB *ParentObjectInfo,
2251                         IN AFSDirectoryCB *DirEntry,
2252                         IN BOOLEAN InsertInEnumList)
2253 {
2254
2255     LONG lCount;
2256
2257     __Enter
2258     {
2259
2260         ASSERT( ExIsResourceAcquiredExclusiveLite( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock));
2261
2262         //
2263         // Insert the node into the directory node tree
2264         //
2265
2266         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2267                       AFS_TRACE_LEVEL_VERBOSE,
2268                       "AFSInsertDirectoryNode Insert DE %p for %wZ Clearing NOT_IN flag\n",
2269                       DirEntry,
2270                       &DirEntry->NameInformation.FileName);
2271
2272         ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE);
2273
2274         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead == NULL)
2275         {
2276
2277             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead = DirEntry;
2278
2279             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2280                           AFS_TRACE_LEVEL_VERBOSE,
2281                           "AFSInsertDirectoryNode Insert DE %p to head of case sensitive tree for %wZ\n",
2282                           DirEntry,
2283                           &DirEntry->NameInformation.FileName);
2284         }
2285         else
2286         {
2287
2288             AFSInsertCaseSensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
2289                                             DirEntry);
2290
2291             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2292                           AFS_TRACE_LEVEL_VERBOSE,
2293                           "AFSInsertDirectoryNode Insert DE %p to case sensitive tree for %wZ\n",
2294                           DirEntry,
2295                           &DirEntry->NameInformation.FileName);
2296         }
2297
2298         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead == NULL)
2299         {
2300
2301             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead = DirEntry;
2302
2303             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD);
2304
2305             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2306                           AFS_TRACE_LEVEL_VERBOSE,
2307                           "AFSInsertDirectoryNode Insert DE %p to head of case insensitive tree for %wZ\n",
2308                           DirEntry,
2309                           &DirEntry->NameInformation.FileName);
2310         }
2311         else
2312         {
2313
2314             AFSInsertCaseInsensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
2315                                               DirEntry);
2316
2317             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2318                           AFS_TRACE_LEVEL_VERBOSE,
2319                           "AFSInsertDirectoryNode Insert DE %p to case insensitive tree for %wZ\n",
2320                           DirEntry,
2321                           &DirEntry->NameInformation.FileName);
2322         }
2323
2324         //
2325         // Into the shortname tree
2326         //
2327
2328         if( DirEntry->Type.Data.ShortNameTreeEntry.HashIndex != 0)
2329         {
2330
2331             if( ParentObjectInfo->Specific.Directory.ShortNameTree == NULL)
2332             {
2333
2334                 ParentObjectInfo->Specific.Directory.ShortNameTree = DirEntry;
2335
2336                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2337                               AFS_TRACE_LEVEL_VERBOSE,
2338                               "AFSInsertDirectoryNode Insert DE %p to head of shortname tree for %wZ\n",
2339                               DirEntry,
2340                               &DirEntry->NameInformation.FileName);
2341
2342                 SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_SHORT_NAME);
2343             }
2344             else
2345             {
2346
2347                 if( !NT_SUCCESS( AFSInsertShortNameDirEntry( ParentObjectInfo->Specific.Directory.ShortNameTree,
2348                                                              DirEntry)))
2349                 {
2350                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2351                                   AFS_TRACE_LEVEL_VERBOSE,
2352                                   "AFSInsertDirectoryNode Failed to insert DE %p to shortname tree for %wZ\n",
2353                                   DirEntry,
2354                                   &DirEntry->NameInformation.FileName);
2355                 }
2356                 else
2357                 {
2358                     SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_SHORT_NAME);
2359
2360                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2361                                   AFS_TRACE_LEVEL_VERBOSE,
2362                                   "AFSInsertDirectoryNode Insert DE %p to shortname tree for %wZ\n",
2363                                   DirEntry,
2364                                   &DirEntry->NameInformation.FileName);
2365                 }
2366             }
2367         }
2368
2369         if( InsertInEnumList)
2370         {
2371
2372             //
2373             // And insert the node into the directory list
2374             //
2375
2376             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2377                           AFS_TRACE_LEVEL_VERBOSE,
2378                           "AFSInsertDirectoryNode Inserting entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2379                           DirEntry,
2380                           &DirEntry->NameInformation.FileName,
2381                           DirEntry->ObjectInformation->FileId.Cell,
2382                           DirEntry->ObjectInformation->FileId.Volume,
2383                           DirEntry->ObjectInformation->FileId.Vnode,
2384                           DirEntry->ObjectInformation->FileId.Unique);
2385
2386             if( ParentObjectInfo->Specific.Directory.DirectoryNodeListHead == NULL)
2387             {
2388
2389                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = DirEntry;
2390             }
2391             else
2392             {
2393
2394                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail->ListEntry.fLink = (void *)DirEntry;
2395
2396                 DirEntry->ListEntry.bLink = (void *)ParentObjectInfo->Specific.Directory.DirectoryNodeListTail;
2397             }
2398
2399             ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = DirEntry;
2400
2401             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2402
2403             lCount = InterlockedIncrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2404
2405             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2406                           AFS_TRACE_LEVEL_VERBOSE,
2407                           "AFSInsertDirectoryNode Adding entry %wZ Inc Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2408                           &DirEntry->NameInformation.FileName,
2409                           lCount,
2410                           ParentObjectInfo->FileId.Cell,
2411                           ParentObjectInfo->FileId.Volume,
2412                           ParentObjectInfo->FileId.Vnode,
2413                           ParentObjectInfo->FileId.Unique);
2414         }
2415     }
2416
2417     return;
2418 }
2419
2420 NTSTATUS
2421 AFSDeleteDirEntry( IN AFSObjectInfoCB *ParentObjectInfo,
2422                    IN AFSDirectoryCB *DirEntry)
2423 {
2424
2425     NTSTATUS ntStatus = STATUS_SUCCESS;
2426     LONG lCount;
2427
2428     __Enter
2429     {
2430
2431         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2432                       AFS_TRACE_LEVEL_VERBOSE,
2433                       "AFSDeleteDirEntry Deleting dir entry in parent %08lX Entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2434                       ParentObjectInfo,
2435                       DirEntry,
2436                       &DirEntry->NameInformation.FileName,
2437                       DirEntry->ObjectInformation->FileId.Cell,
2438                       DirEntry->ObjectInformation->FileId.Volume,
2439                       DirEntry->ObjectInformation->FileId.Vnode,
2440                       DirEntry->ObjectInformation->FileId.Unique);
2441
2442         AFSRemoveDirNodeFromParent( ParentObjectInfo,
2443                                     DirEntry,
2444                                     TRUE);
2445
2446         //
2447         // Free up the name buffer if it was reallocated
2448         //
2449
2450         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_NAME_BUFFER))
2451         {
2452
2453             AFSExFreePoolWithTag( DirEntry->NameInformation.FileName.Buffer, 0);
2454         }
2455
2456         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_TARGET_NAME_BUFFER))
2457         {
2458
2459             AFSExFreePoolWithTag( DirEntry->NameInformation.TargetName.Buffer, 0);
2460         }
2461
2462         //
2463         // Dereference the object for this dir entry
2464         //
2465
2466         ASSERT( DirEntry->ObjectInformation->ObjectReferenceCount > 0);
2467
2468         lCount = AFSObjectInfoDecrement( DirEntry->ObjectInformation);
2469
2470         if( lCount <= 0)
2471         {
2472             SetFlag( DirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED);
2473         }
2474
2475         AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2476                       AFS_TRACE_LEVEL_VERBOSE,
2477                       "AFSDeleteDirEntry Decrement count on object %08lX Cnt %d\n",
2478                       DirEntry->ObjectInformation,
2479                       lCount);
2480
2481         ExDeleteResourceLite( &DirEntry->NonPaged->Lock);
2482
2483         AFSExFreePoolWithTag( DirEntry->NonPaged, AFS_DIR_ENTRY_NP_TAG);
2484
2485         //
2486         // Free up the dir entry
2487         //
2488
2489         AFSExFreePoolWithTag( DirEntry, AFS_DIR_ENTRY_TAG);
2490     }
2491
2492     return ntStatus;
2493 }
2494
2495 NTSTATUS
2496 AFSRemoveDirNodeFromParent( IN AFSObjectInfoCB *ParentObjectInfo,
2497                             IN AFSDirectoryCB *DirEntry,
2498                             IN BOOLEAN RemoveFromEnumList)
2499 {
2500
2501     NTSTATUS ntStatus = STATUS_SUCCESS;
2502     LONG lCount;
2503
2504     __Enter
2505     {
2506
2507
2508         ASSERT( ExIsResourceAcquiredExclusiveLite( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock));
2509
2510         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2511                       AFS_TRACE_LEVEL_VERBOSE,
2512                       "AFSRemoveDirNodeFromParent Removing DirEntry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX from Parent %08lX\n",
2513                       DirEntry,
2514                       &DirEntry->NameInformation.FileName,
2515                       DirEntry->ObjectInformation->FileId.Cell,
2516                       DirEntry->ObjectInformation->FileId.Volume,
2517                       DirEntry->ObjectInformation->FileId.Vnode,
2518                       DirEntry->ObjectInformation->FileId.Unique,
2519                       ParentObjectInfo);
2520
2521         if( !BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE))
2522         {
2523
2524             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2525                           AFS_TRACE_LEVEL_VERBOSE,
2526                           "AFSRemoveDirNodeFromParent Removing DirEntry %08lX name %wZ\n",
2527                           DirEntry,
2528                           &DirEntry->NameInformation.FileName);
2529
2530             AFSRemoveNameEntry( ParentObjectInfo,
2531                                 DirEntry);
2532         }
2533         else
2534         {
2535
2536             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2537                           AFS_TRACE_LEVEL_VERBOSE,
2538                           "AFSRemoveDirNodeFromParent DE %p for %wZ NOT removing entry due to flag set\n",
2539                           DirEntry,
2540                           &DirEntry->NameInformation.FileName);
2541
2542         }
2543
2544         if( RemoveFromEnumList &&
2545             BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST))
2546         {
2547
2548             //
2549             // And remove the entry from the enumeration list
2550             //
2551
2552             if( DirEntry->ListEntry.fLink == NULL)
2553             {
2554
2555                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = (AFSDirectoryCB *)DirEntry->ListEntry.bLink;
2556             }
2557             else
2558             {
2559
2560                 ((AFSDirectoryCB *)DirEntry->ListEntry.fLink)->ListEntry.bLink = DirEntry->ListEntry.bLink;
2561             }
2562
2563             if( DirEntry->ListEntry.bLink == NULL)
2564             {
2565
2566                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = (AFSDirectoryCB *)DirEntry->ListEntry.fLink;
2567             }
2568             else
2569             {
2570
2571                 ((AFSDirectoryCB *)DirEntry->ListEntry.bLink)->ListEntry.fLink = DirEntry->ListEntry.fLink;
2572             }
2573
2574             ASSERT( ParentObjectInfo->Specific.Directory.DirectoryNodeCount > 0);
2575
2576             lCount = InterlockedDecrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2577
2578             ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2579
2580             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2581                           AFS_TRACE_LEVEL_VERBOSE,
2582                           "AFSRemoveDirNodeFromParent Removing entry %wZ Dec Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2583                           &DirEntry->NameInformation.FileName,
2584                           lCount,
2585                           ParentObjectInfo->FileId.Cell,
2586                           ParentObjectInfo->FileId.Volume,
2587                           ParentObjectInfo->FileId.Vnode,
2588                           ParentObjectInfo->FileId.Unique);
2589
2590             DirEntry->ListEntry.fLink = NULL;
2591             DirEntry->ListEntry.bLink = NULL;
2592         }
2593     }
2594
2595     return ntStatus;
2596 }
2597
2598 NTSTATUS
2599 AFSFixupTargetName( IN OUT PUNICODE_STRING FileName,
2600                     IN OUT PUNICODE_STRING TargetFileName)
2601 {
2602
2603     NTSTATUS ntStatus = STATUS_SUCCESS;
2604     UNICODE_STRING uniFileName;
2605
2606     __Enter
2607     {
2608
2609         //
2610         // We will process backwards from the end of the name looking
2611         // for the first \ we encounter
2612         //
2613
2614         uniFileName.Length = FileName->Length;
2615         uniFileName.MaximumLength = FileName->MaximumLength;
2616
2617         uniFileName.Buffer = FileName->Buffer;
2618
2619         while( TRUE)
2620         {
2621
2622             if( uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) - 1] == L'\\')
2623             {
2624
2625                 //
2626                 // Subtract one more character off of the filename if it is not the root
2627                 //
2628
2629                 if( uniFileName.Length > sizeof( WCHAR))
2630                 {
2631
2632                     uniFileName.Length -= sizeof( WCHAR);
2633                 }
2634
2635                 //
2636                 // Now build up the target name
2637                 //
2638
2639                 TargetFileName->Length = FileName->Length - uniFileName.Length;
2640
2641                 //
2642                 // If we are not on the root then fixup the name
2643                 //
2644
2645                 if( uniFileName.Length > sizeof( WCHAR))
2646                 {
2647
2648                     TargetFileName->Length -= sizeof( WCHAR);
2649
2650                     TargetFileName->Buffer = &uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) + 1];
2651                 }
2652                 else
2653                 {
2654
2655                     TargetFileName->Buffer = &uniFileName.Buffer[ uniFileName.Length/sizeof( WCHAR)];
2656                 }
2657
2658                 //
2659                 // Fixup the passed back filename length
2660                 //
2661
2662                 FileName->Length = uniFileName.Length;
2663
2664                 TargetFileName->MaximumLength = TargetFileName->Length;
2665
2666                 break;
2667             }
2668
2669             uniFileName.Length -= sizeof( WCHAR);
2670         }
2671     }
2672
2673     return ntStatus;
2674 }
2675
2676 NTSTATUS
2677 AFSParseName( IN PIRP Irp,
2678               IN GUID *AuthGroup,
2679               OUT PUNICODE_STRING FileName,
2680               OUT PUNICODE_STRING ParsedFileName,
2681               OUT PUNICODE_STRING RootFileName,
2682               OUT ULONG *ParseFlags,
2683               OUT AFSVolumeCB   **VolumeCB,
2684               OUT AFSDirectoryCB **ParentDirectoryCB,
2685               OUT AFSNameArrayHdr **NameArray)
2686 {
2687
2688     NTSTATUS            ntStatus = STATUS_SUCCESS;
2689     PIO_STACK_LOCATION  pIrpSp = IoGetCurrentIrpStackLocation( Irp);
2690     AFSDeviceExt       *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2691     UNICODE_STRING      uniFullName, uniComponentName, uniRemainingPath;
2692     ULONG               ulCRC = 0;
2693     AFSDirectoryCB     *pDirEntry = NULL, *pShareDirEntry = NULL, *pTargetDirEntry = NULL;
2694     USHORT              usIndex = 0, usDriveIndex = 0;
2695     AFSCcb             *pRelatedCcb = NULL;
2696     AFSNameArrayHdr    *pNameArray = NULL, *pRelatedNameArray = NULL;
2697     USHORT              usComponentIndex = 0;
2698     USHORT              usComponentLength = 0;
2699     AFSVolumeCB        *pVolumeCB = NULL;
2700     AFSFcb             *pRelatedFcb = NULL;
2701     BOOLEAN             bReleaseTreeLock = FALSE;
2702     BOOLEAN             bIsAllShare = FALSE;
2703     LONG                lCount;
2704
2705     __Enter
2706     {
2707
2708         //
2709         // Indicate we are opening a root ...
2710         //
2711
2712         *ParseFlags = AFS_PARSE_FLAG_ROOT_ACCESS;
2713
2714         if( pIrpSp->FileObject->RelatedFileObject != NULL)
2715         {
2716
2717             pRelatedFcb = (AFSFcb *)pIrpSp->FileObject->RelatedFileObject->FsContext;
2718
2719             pRelatedCcb = (AFSCcb *)pIrpSp->FileObject->RelatedFileObject->FsContext2;
2720
2721             pRelatedNameArray = pRelatedCcb->NameArray;
2722
2723             uniFullName = pIrpSp->FileObject->FileName;
2724
2725             ASSERT( pRelatedFcb != NULL);
2726
2727             //
2728             // No wild cards in the name
2729             //
2730
2731             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2732                           AFS_TRACE_LEVEL_VERBOSE_2,
2733                           "AFSParseName (%08lX) Relative open for %wZ FID %08lX-%08lX-%08lX-%08lX component %wZ\n",
2734                           Irp,
2735                           &pRelatedCcb->DirectoryCB->NameInformation.FileName,
2736                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Cell,
2737                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Volume,
2738                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Vnode,
2739                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Unique,
2740                           &uniFullName);
2741
2742             if( FsRtlDoesNameContainWildCards( &uniFullName))
2743             {
2744
2745                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2746                               AFS_TRACE_LEVEL_ERROR,
2747                               "AFSParseName (%08lX) Component %wZ contains wild cards\n",
2748                               Irp,
2749                               &uniFullName);
2750
2751                 try_return( ntStatus = STATUS_OBJECT_NAME_INVALID);
2752             }
2753
2754             pVolumeCB = pRelatedFcb->ObjectInformation->VolumeCB;
2755
2756             pDirEntry = pRelatedCcb->DirectoryCB;
2757
2758             *FileName = pIrpSp->FileObject->FileName;
2759
2760             //
2761             // Grab the root node while checking state
2762             //
2763
2764             AFSAcquireShared( pVolumeCB->VolumeLock,
2765                               TRUE);
2766
2767             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID) ||
2768                 BooleanFlagOn( pVolumeCB->Flags, AFS_VOLUME_FLAGS_OFFLINE))
2769             {
2770
2771                 //
2772                 // The volume has been taken off line so fail the access
2773                 //
2774
2775                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2776                               AFS_TRACE_LEVEL_ERROR,
2777                               "AFSParseName (%08lX) Volume %08lX:%08lX OFFLINE/INVALID\n",
2778                               Irp,
2779                               pVolumeCB->ObjectInformation.FileId.Cell,
2780                               pVolumeCB->ObjectInformation.FileId.Volume);
2781
2782                 AFSReleaseResource( pVolumeCB->VolumeLock);
2783
2784                 try_return( ntStatus = STATUS_DEVICE_NOT_READY);
2785             }
2786
2787             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_VERIFY))
2788             {
2789
2790                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2791                               AFS_TRACE_LEVEL_VERBOSE,
2792                               "AFSParseName (%08lX) Verifying root of volume %08lX:%08lX\n",
2793                               Irp,
2794                               pVolumeCB->ObjectInformation.FileId.Cell,
2795                               pVolumeCB->ObjectInformation.FileId.Volume);
2796
2797                 ntStatus = AFSVerifyVolume( (ULONGLONG)PsGetCurrentProcessId(),
2798                                             pVolumeCB);
2799
2800                 if( !NT_SUCCESS( ntStatus))
2801                 {
2802
2803                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2804                                   AFS_TRACE_LEVEL_ERROR,
2805                                   "AFSParseName (%08lX) Failed verification of root Status %08lX\n",
2806                                   Irp,
2807                                   ntStatus);
2808
2809                     AFSReleaseResource( pVolumeCB->VolumeLock);
2810
2811                     try_return( ntStatus);
2812                 }
2813             }
2814
2815             AFSReleaseResource( pVolumeCB->VolumeLock);
2816
2817             if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY))
2818             {
2819
2820                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2821                               AFS_TRACE_LEVEL_VERBOSE,
2822                               "AFSParseName (%08lX) Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2823                               Irp,
2824                               &pDirEntry->NameInformation.FileName,
2825                               pDirEntry->ObjectInformation->FileId.Cell,
2826                               pDirEntry->ObjectInformation->FileId.Volume,
2827                               pDirEntry->ObjectInformation->FileId.Vnode,
2828                               pDirEntry->ObjectInformation->FileId.Unique);
2829
2830                 //
2831                 // Directory TreeLock should be exclusively held
2832                 //
2833
2834                 AFSAcquireExcl( pDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
2835                                 TRUE);
2836
2837                 ntStatus = AFSVerifyEntry( AuthGroup,
2838                                            pDirEntry);
2839
2840                 AFSReleaseResource( pDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
2841
2842                 if( !NT_SUCCESS( ntStatus))
2843                 {
2844