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     AFSVolumeCB      *pCurrentVolume = *VolumeCB;
  67     BOOLEAN           bReleaseCurrentVolume = TRUE;
  68     BOOLEAN           bSubstitutedName = FALSE;
  69
  70     __Enter
  71     {
  72
  73         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
  74                       AFS_TRACE_LEVEL_VERBOSE_2,
  75                       "AFSLocateNameEntry (FO: %08lX) Processing full name %wZ\n",
  76                       FileObject,
  77                       RootPathName);
  78
  79         RtlInitUnicodeString( &uniSysName,
  80                               L"*@SYS");
  81
  82         RtlInitUnicodeString( &uniRelativeName,
  83                               L"..");
  84
  85         RtlInitUnicodeString( &uniNoOpName,
  86                               L".");
  87
  88         //
  89         // Cleanup some parameters
  90         //
  91
  92         if( ComponentName != NULL)
  93         {
  94
  95             ComponentName->Length = 0;
  96             ComponentName->MaximumLength = 0;
  97             ComponentName->Buffer = NULL;
  98         }
  99
 100         //
 101         // We will parse through the filename, locating the directory nodes until we encounter a cache miss
 102         // Starting at the root node
 103         //
 104
 105         pParentDirEntry = NULL;
 106
 107         pDirEntry = *ParentDirectoryCB;
 108
 109         uniPathName = *ParsedPathName;
 110
 111         uniFullPathName = *RootPathName;
 112
 113         uniComponentName.Length = uniComponentName.MaximumLength = 0;
 114         uniComponentName.Buffer = NULL;
 115
 116         uniRemainingPath.Length = uniRemainingPath.MaximumLength = 0;
 117         uniRemainingPath.Buffer = NULL;
 118
 119         uniSearchName.Length = uniSearchName.MaximumLength = 0;
 120         uniSearchName.Buffer = NULL;
 121
 122         ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
 123
 124         while( TRUE)
 125         {
 126
 127             //
 128             // Check our total link count for this name array
 129             //
 130
 131             if( pNameArray->LinkCount >= (LONG)pDevExt->Specific.RDR.MaxLinkCount)
 132             {
 133
 134                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 135             }
 136
 137             pCurrentObject = pDirEntry->ObjectInformation;
 138
 139             KeQueryTickCount( &pCurrentObject->LastAccessCount);
 140
 141             //
 142             // Check that the directory entry is not deleted or pending delete
 143             //
 144
 145             if( BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_DELETED))
 146             {
 147
 148                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 149                               AFS_TRACE_LEVEL_ERROR,
 150                               "AFSLocateNameEntry (FO: %08lX) Deleted parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 151                               FileObject,
 152                               &pDirEntry->NameInformation.FileName,
 153                               pCurrentObject->FileId.Cell,
 154                               pCurrentObject->FileId.Volume,
 155                               pCurrentObject->FileId.Vnode,
 156                               pCurrentObject->FileId.Unique,
 157                               ntStatus);
 158
 159                 try_return( ntStatus = STATUS_FILE_DELETED);
 160             }
 161
 162             if( BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_PENDING_DELETE))
 163             {
 164
 165                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 166                               AFS_TRACE_LEVEL_ERROR,
 167                               "AFSLocateNameEntry (FO: %08lX) Delete pending on %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 168                               FileObject,
 169                               &pDirEntry->NameInformation.FileName,
 170                               pCurrentObject->FileId.Cell,
 171                               pCurrentObject->FileId.Volume,
 172                               pCurrentObject->FileId.Vnode,
 173                               pCurrentObject->FileId.Unique,
 174                               ntStatus);
 175
 176                 try_return( ntStatus = STATUS_DELETE_PENDING);
 177             }
 178
 179             //
 180             // Check if the directory requires verification
 181             //
 182
 183             if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_VERIFY) &&
 184                 ( pCurrentObject->FileType != AFS_FILE_TYPE_DIRECTORY ||
 185                   !AFSIsEnumerationInProcess( pCurrentObject)))
 186             {
 187
 188                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 189                               AFS_TRACE_LEVEL_VERBOSE,
 190                               "AFSLocateNameEntry (FO: %08lX) Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 191                               FileObject,
 192                               &pDirEntry->NameInformation.FileName,
 193                               pCurrentObject->FileId.Cell,
 194                               pCurrentObject->FileId.Volume,
 195                               pCurrentObject->FileId.Vnode,
 196                               pCurrentObject->FileId.Unique);
 197
 198                 ntStatus = AFSVerifyEntry( AuthGroup,
 199                                            pDirEntry);
 200
 201                 if( !NT_SUCCESS( ntStatus))
 202                 {
 203
 204                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 205                                   AFS_TRACE_LEVEL_ERROR,
 206                                   "AFSLocateNameEntry (FO: %08lX) Failed to verify parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 207                                   FileObject,
 208                                   &pDirEntry->NameInformation.FileName,
 209                                   pCurrentObject->FileId.Cell,
 210                                   pCurrentObject->FileId.Volume,
 211                                   pCurrentObject->FileId.Vnode,
 212                                   pCurrentObject->FileId.Unique,
 213                                   ntStatus);
 214
 215                     try_return( ntStatus);
 216                 }
 217             }
 218
 219             //
 220             // Ensure the parent node has been evaluated, if not then go do it now
 221             //
 222
 223             if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_NOT_EVALUATED) ||
 224                 pCurrentObject->FileType == AFS_FILE_TYPE_UNKNOWN)
 225             {
 226
 227                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 228                               AFS_TRACE_LEVEL_VERBOSE,
 229                               "AFSLocateNameEntry (FO: %08lX) Evaluating parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 230                               FileObject,
 231                               &pDirEntry->NameInformation.FileName,
 232                               pCurrentObject->FileId.Cell,
 233                               pCurrentObject->FileId.Volume,
 234                               pCurrentObject->FileId.Vnode,
 235                               pCurrentObject->FileId.Unique);
 236
 237                 ntStatus = AFSEvaluateNode( AuthGroup,
 238                                             pDirEntry);
 239
 240                 if( !NT_SUCCESS( ntStatus))
 241                 {
 242
 243                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 244                                   AFS_TRACE_LEVEL_ERROR,
 245                                   "AFSLocateNameEntry (FO: %08lX) Failed to evaluate parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 246                                   FileObject,
 247                                   &pDirEntry->NameInformation.FileName,
 248                                   pCurrentObject->FileId.Cell,
 249                                   pCurrentObject->FileId.Volume,
 250                                   pCurrentObject->FileId.Vnode,
 251                                   pCurrentObject->FileId.Unique,
 252                                   ntStatus);
 253
 254                     try_return( ntStatus);
 255                 }
 256
 257                 ClearFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_NOT_EVALUATED);
 258             }
 259
 260             //
 261             // If this is a mount point or symlink then go get the real directory node
 262             //
 263
 264             switch( pCurrentObject->FileType)
 265             {
 266
 267                 case AFS_FILE_TYPE_SYMLINK:
 268                 {
 269
 270                     UNICODE_STRING uniTempName;
 271                     WCHAR *pTmpBuffer = NULL;
 272                     LONG lLinkCount = 0;
 273
 274                     //
 275                     // Check if the flag is set to NOT evaluate a symlink
 276                     // and we are done with the parsing
 277                     //
 278
 279                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_SL_TARGET_EVAL) &&
 280                         uniRemainingPath.Length == 0)
 281                     {
 282
 283                         //
 284                         // Pass back the directory entries
 285                         //
 286
 287                         *ParentDirectoryCB = pParentDirEntry;
 288
 289                         *DirectoryCB = pDirEntry;
 290
 291                         *VolumeCB = pCurrentVolume;
 292
 293                         *RootPathName = uniFullPathName;
 294
 295                         try_return( ntStatus);
 296                     }
 297
 298                     AFSAcquireExcl( &pDirEntry->NonPaged->Lock,
 299                                     TRUE);
 300
 301                     if( pDirEntry->NameInformation.TargetName.Length == 0)
 302                     {
 303
 304                         //
 305                         // We'll reset the DV to ensure we validate the metadata content
 306                         //
 307
 308                         pCurrentObject->DataVersion.QuadPart = (ULONGLONG)-1;
 309
 310                         SetFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_VERIFY);
 311
 312                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 313                                       AFS_TRACE_LEVEL_VERBOSE,
 314                                       "AFSLocateNameEntry (FO: %08lX) Verifying symlink parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 315                                       FileObject,
 316                                       &pDirEntry->NameInformation.FileName,
 317                                       pCurrentObject->FileId.Cell,
 318                                       pCurrentObject->FileId.Volume,
 319                                       pCurrentObject->FileId.Vnode,
 320                                       pCurrentObject->FileId.Unique);
 321
 322                         ntStatus = AFSVerifyEntry( AuthGroup,
 323                                                    pDirEntry);
 324
 325                         if( !NT_SUCCESS( ntStatus))
 326                         {
 327
 328                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 329                                           AFS_TRACE_LEVEL_ERROR,
 330                                           "AFSLocateNameEntry (FO: %08lX) Failed to verify symlink parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 331                                           FileObject,
 332                                           &pDirEntry->NameInformation.FileName,
 333                                           pCurrentObject->FileId.Cell,
 334                                           pCurrentObject->FileId.Volume,
 335                                           pCurrentObject->FileId.Vnode,
 336                                           pCurrentObject->FileId.Unique,
 337                                           ntStatus);
 338
 339                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 340
 341                             try_return( ntStatus);
 342                         }
 343
 344                         //
 345                         // If the type changed then reprocess this entry
 346                         //
 347
 348                         if( pCurrentObject->FileType != AFS_FILE_TYPE_SYMLINK)
 349                         {
 350
 351                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 352
 353                             continue;
 354                         }
 355                     }
 356
 357                     //
 358                     // If we were given a zero length target name then deny access to the entry
 359                     //
 360
 361                     if( pDirEntry->NameInformation.TargetName.Length == 0)
 362                     {
 363
 364                         ntStatus = STATUS_ACCESS_DENIED;
 365
 366                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 367                                       AFS_TRACE_LEVEL_ERROR,
 368                                       "AFSLocateNameEntry (FO: %08lX) Failed to retrieve target name for symlink %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 369                                       FileObject,
 370                                       &pDirEntry->NameInformation.FileName,
 371                                       pCurrentObject->FileId.Cell,
 372                                       pCurrentObject->FileId.Volume,
 373                                       pCurrentObject->FileId.Vnode,
 374                                       pCurrentObject->FileId.Unique,
 375                                       ntStatus);
 376
 377                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 378
 379                         try_return( ntStatus);
 380                     }
 381
 382                     if( AFSIsRelativeName( &pDirEntry->NameInformation.TargetName))
 383                     {
 384
 385                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 386                                       AFS_TRACE_LEVEL_VERBOSE,
 387                                       "AFSLocateNameEntry (FO: %08lX) Processing relative symlink target %wZ for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 388                                       FileObject,
 389                                       &pDirEntry->NameInformation.TargetName,
 390                                       &pDirEntry->NameInformation.FileName,
 391                                       pCurrentObject->FileId.Cell,
 392                                       pCurrentObject->FileId.Volume,
 393                                       pCurrentObject->FileId.Vnode,
 394                                       pCurrentObject->FileId.Unique);
 395
 396                         //
 397                         // We'll substitute this name into the current process name
 398                         // starting at where we sit in the path
 399                         //
 400
 401                         uniTempName.Length = 0;
 402                         uniTempName.MaximumLength = (USHORT)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer) +
 403                                                                     pDirEntry->NameInformation.TargetName.Length +
 404                                                                     sizeof( WCHAR) +
 405                                                                     uniRemainingPath.Length;
 406
 407                         uniTempName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
 408                                                                                 uniTempName.MaximumLength,
 409                                                                                 AFS_NAME_BUFFER_ONE_TAG);
 410
 411                         if( uniTempName.Buffer == NULL)
 412                         {
 413
 414                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 415
 416                             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 417                         }
 418
 419                         //
 420                         // We have so first copy in the portion up to the component
 421                         // name
 422                         //
 423
 424                         RtlCopyMemory( uniTempName.Buffer,
 425                                        uniFullPathName.Buffer,
 426                                        (ULONG)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer));
 427
 428                         uniTempName.Length = (USHORT)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer);
 429
 430                         if( bAllocatedSymLinkBuffer ||
 431                             bSubstitutedName)
 432                         {
 433
 434                             pTmpBuffer = uniFullPathName.Buffer;
 435                         }
 436
 437                         bAllocatedSymLinkBuffer = TRUE;
 438
 439                         //
 440                         // Have we parsed this name yet? Better have at least once ...
 441                         //
 442
 443                         if( uniComponentName.Length == 0)
 444                         {
 445                             ASSERT( FALSE);
 446                         }
 447
 448                         //
 449                         // Copy in the target name ...
 450                         //
 451
 452                         RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
 453                                        pDirEntry->NameInformation.TargetName.Buffer,
 454                                        pDirEntry->NameInformation.TargetName.Length);
 455
 456                         uniPathName.Buffer = &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)];
 457
 458                         uniPathName.Length += pDirEntry->NameInformation.TargetName.Length;
 459                         uniPathName.MaximumLength = uniTempName.MaximumLength;
 460
 461                         uniTempName.Length += pDirEntry->NameInformation.TargetName.Length;
 462
 463                         //
 464                         // And now any remaining portion of the name
 465                         //
 466
 467                         if( uniRemainingPath.Length > 0)
 468                         {
 469
 470                             if( uniRemainingPath.Buffer[ 0] != L'\\')
 471                             {
 472
 473                                 uniRemainingPath.Buffer--;
 474                                 uniRemainingPath.Length += sizeof( WCHAR);
 475
 476                                 uniPathName.Length += sizeof( WCHAR);
 477                             }
 478
 479                             RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
 480                                            uniRemainingPath.Buffer,
 481                                            uniRemainingPath.Length);
 482
 483                             uniTempName.Length += uniRemainingPath.Length;
 484                         }
 485
 486                         uniFullPathName = uniTempName;
 487
 488                         if( pTmpBuffer != NULL)
 489                         {
 490
 491                             AFSExFreePool( pTmpBuffer);
 492                         }
 493
 494                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 495
 496                         //
 497                         // Dereference the current entry ..
 498                         //
 499
 500                         InterlockedDecrement( &pDirEntry->OpenReferenceCount);
 501
 502                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 503                                       AFS_TRACE_LEVEL_VERBOSE,
 504                                       "AFSLocateNameEntry Decrement1 count on %wZ DE %p Ccb %p Cnt %d\n",
 505                                       &pDirEntry->NameInformation.FileName,
 506                                       pDirEntry,
 507                                       NULL,
 508                                       pDirEntry->OpenReferenceCount);
 509
 510                         //
 511                         // OK, need to back up one entry for the correct parent since the current
 512                         // entry we are on is the symlink itself
 513                         //
 514
 515                         pDirEntry = AFSBackupEntry( pNameArray);
 516
 517                         //
 518                         // Increment our reference on this dir entry
 519                         //
 520
 521                         InterlockedIncrement( &pDirEntry->OpenReferenceCount);
 522
 523                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 524                                       AFS_TRACE_LEVEL_VERBOSE,
 525                                       "AFSLocateNameEntry Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
 526                                       &pDirEntry->NameInformation.FileName,
 527                                       pDirEntry,
 528                                       NULL,
 529                                       pDirEntry->OpenReferenceCount);
 530
 531                         if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_ROOT_VOLUME))
 532                         {
 533
 534                             pParentDirEntry = NULL;
 535                         }
 536                         else
 537                         {
 538
 539                             pParentDirEntry = AFSGetParentEntry( pNameArray);
 540
 541                             ASSERT( pParentDirEntry != pDirEntry);
 542                         }
 543                     }
 544                     else
 545                     {
 546
 547                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 548                                       AFS_TRACE_LEVEL_VERBOSE,
 549                                       "AFSLocateNameEntry (FO: %08lX) Processing absolute symlink target %wZ for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 550                                       FileObject,
 551                                       &pDirEntry->NameInformation.TargetName,
 552                                       &pDirEntry->NameInformation.FileName,
 553                                       pCurrentObject->FileId.Cell,
 554                                       pCurrentObject->FileId.Volume,
 555                                       pCurrentObject->FileId.Vnode,
 556                                       pCurrentObject->FileId.Unique);
 557
 558                         //
 559                         // We'll substitute this name into the current process name
 560                         // starting at where we sit in the path
 561                         //
 562
 563                         uniTempName.Length = 0;
 564                         uniTempName.MaximumLength = pDirEntry->NameInformation.TargetName.Length +
 565                                                                     sizeof( WCHAR) +
 566                                                                     uniRemainingPath.Length;
 567
 568                         uniTempName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
 569                                                                                 uniTempName.MaximumLength,
 570                                                                                 AFS_NAME_BUFFER_TWO_TAG);
 571
 572                         if( uniTempName.Buffer == NULL)
 573                         {
 574
 575                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 576
 577                             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
 578                         }
 579
 580                         if( bAllocatedSymLinkBuffer ||
 581                             bSubstitutedName)
 582                         {
 583
 584                             pTmpBuffer = uniFullPathName.Buffer;
 585                         }
 586
 587                         bAllocatedSymLinkBuffer = TRUE;
 588
 589                         //
 590                         // Have we parsed this name yet? Better have at least once ...
 591                         //
 592
 593                         if( uniComponentName.Length == 0)
 594                         {
 595                             ASSERT( FALSE);
 596                         }
 597
 598                         //
 599                         // Copy in the target name ...
 600                         //
 601
 602                         RtlCopyMemory( uniTempName.Buffer,
 603                                        pDirEntry->NameInformation.TargetName.Buffer,
 604                                        pDirEntry->NameInformation.TargetName.Length);
 605
 606                         uniTempName.Length = pDirEntry->NameInformation.TargetName.Length;
 607
 608                         //
 609                         // And now any remaining portion of the name
 610                         //
 611
 612                         if( uniRemainingPath.Length > 0)
 613                         {
 614
 615                             if( uniRemainingPath.Buffer[ 0] != L'\\')
 616                             {
 617
 618                                 uniRemainingPath.Buffer--;
 619                                 uniRemainingPath.Length += sizeof( WCHAR);
 620                             }
 621
 622                             RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
 623                                            uniRemainingPath.Buffer,
 624                                            uniRemainingPath.Length);
 625
 626                             uniTempName.Length += uniRemainingPath.Length;
 627                         }
 628
 629                         uniFullPathName = uniTempName;
 630
 631                         uniPathName = uniTempName;
 632
 633                         if( pTmpBuffer != NULL)
 634                         {
 635
 636                             AFSExFreePool( pTmpBuffer);
 637                         }
 638
 639                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
 640
 641                         //
 642                         // If our current volume is not the global root then make it so ...
 643                         //
 644
 645                         if( pCurrentVolume != AFSGlobalRoot)
 646                         {
 647
 648                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 649                                           AFS_TRACE_LEVEL_VERBOSE,
 650                                           "AFSLocateNameEntry (FO: %08lX) Current volume not global, resetting for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 651                                           FileObject,
 652                                           &pDirEntry->NameInformation.FileName,
 653                                           pCurrentObject->FileId.Cell,
 654                                           pCurrentObject->FileId.Volume,
 655                                           pCurrentObject->FileId.Vnode,
 656                                           pCurrentObject->FileId.Unique);
 657
 658                             InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
 659
 660                             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 661                                           AFS_TRACE_LEVEL_VERBOSE,
 662                                           "AFSLocateNameEntry Decrement count on volume %08lX Cnt %d\n",
 663                                           pCurrentVolume,
 664                                           pCurrentVolume->VolumeReferenceCount);
 665
 666                             AFSReleaseResource( pCurrentVolume->VolumeLock);
 667
 668                             pCurrentVolume = AFSGlobalRoot;
 669
 670                             AFSAcquireShared( pCurrentVolume->VolumeLock,
 671                                               TRUE);
 672
 673                             InterlockedIncrement( &pCurrentVolume->VolumeReferenceCount);
 674
 675                             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 676                                           AFS_TRACE_LEVEL_VERBOSE,
 677                                           "AFSLocateNameEntry Increment count on volume %08lX Cnt %d\n",
 678                                           pCurrentVolume,
 679                                           pCurrentVolume->VolumeReferenceCount);
 680                         }
 681
 682                         //
 683                         // Dereference our current dir entry
 684                         //
 685
 686                         InterlockedDecrement( &pDirEntry->OpenReferenceCount);
 687
 688                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 689                                       AFS_TRACE_LEVEL_VERBOSE,
 690                                       "AFSLocateNameEntry Decrement2 count on %wZ DE %p Ccb %p Cnt %d\n",
 691                                       &pDirEntry->NameInformation.FileName,
 692                                       pDirEntry,
 693                                       NULL,
 694                                       pDirEntry->OpenReferenceCount);
 695
 696                         pDirEntry = pCurrentVolume->DirectoryCB;
 697
 698                         //
 699                         // Reference the new dir entry
 700                         //
 701
 702                         InterlockedIncrement( &pDirEntry->OpenReferenceCount);
 703
 704                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 705                                       AFS_TRACE_LEVEL_VERBOSE,
 706                                       "AFSLocateNameEntry Increment2 count on %wZ DE %p Ccb %p Cnt %d\n",
 707                                       &pDirEntry->NameInformation.FileName,
 708                                       pDirEntry,
 709                                       NULL,
 710                                       pDirEntry->OpenReferenceCount);
 711
 712                         //
 713                         // Reset the name array
 714                         // Persist the link count in the name array
 715                         //
 716
 717                         lLinkCount = pNameArray->LinkCount;
 718
 719                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 720                                       AFS_TRACE_LEVEL_VERBOSE,
 721                                       "AFSLocateNameEntry (FO: %08lX) Resetting name array for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 722                                       FileObject,
 723                                       &pDirEntry->NameInformation.FileName,
 724                                       pCurrentObject->FileId.Cell,
 725                                       pCurrentObject->FileId.Volume,
 726                                       pCurrentObject->FileId.Vnode,
 727                                       pCurrentObject->FileId.Unique);
 728
 729                         AFSResetNameArray( pNameArray,
 730                                            pDirEntry);
 731
 732                         pNameArray->LinkCount = lLinkCount;
 733
 734                         //
 735                         // Process over the \\<Global root> portion of the name
 736                         //
 737
 738                         FsRtlDissectName( uniPathName,
 739                                           &uniComponentName,
 740                                           &uniRemainingPath);
 741
 742                         if( RtlCompareUnicodeString( &uniComponentName,
 743                                                      &AFSServerName,
 744                                                      TRUE) != 0)
 745                         {
 746
 747                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 748                                           AFS_TRACE_LEVEL_ERROR,
 749                                           "AFSLocateNameEntry Name %wZ contains invalid server name\n",
 750                                           &uniPathName);
 751
 752                             //
 753                             // The correct response would be STATUS_OBJECT_PATH_INVALID
 754                             // but that prevents cmd.exe from performing a recursive
 755                             // directory enumeration when opening a directory entry
 756                             // that represents a symlink to an invalid path is discovered.
 757                             //
 758                             try_return( ntStatus = STATUS_OBJECT_PATH_NOT_FOUND);
 759                         }
 760
 761                         uniPathName = uniRemainingPath;
 762
 763                         pParentDirEntry = NULL;
 764                     }
 765
 766                     //
 767                     // Increment our link count
 768                     //
 769
 770                     InterlockedIncrement( &pNameArray->LinkCount);
 771
 772                     continue;
 773                 }
 774
 775                 case AFS_FILE_TYPE_MOUNTPOINT:
 776                 {
 777
 778                     //
 779                     // Check if the flag is set to NOT evaluate a mount point
 780                     // and we are done with the parsing
 781                     //
 782
 783                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_MP_TARGET_EVAL) &&
 784                         uniRemainingPath.Length == 0)
 785                     {
 786
 787                         //
 788                         // Pass back the directory entries
 789                         //
 790
 791                         *ParentDirectoryCB = pParentDirEntry;
 792
 793                         *DirectoryCB = pDirEntry;
 794
 795                         *VolumeCB = pCurrentVolume;
 796
 797                         *RootPathName = uniFullPathName;
 798
 799                         try_return( ntStatus);
 800                     }
 801
 802                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 803                                   AFS_TRACE_LEVEL_VERBOSE,
 804                                   "AFSLocateNameEntry (FO: %08lX) Building MP target for parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 805                                   FileObject,
 806                                   &pDirEntry->NameInformation.FileName,
 807                                   pCurrentObject->FileId.Cell,
 808                                   pCurrentObject->FileId.Volume,
 809                                   pCurrentObject->FileId.Vnode,
 810                                   pCurrentObject->FileId.Unique);
 811
 812                     //
 813                     // Go retrieve the target entry for this node
 814                     // Release the current volume cb entry since we would
 815                     // have lock inversion in the following call
 816                     // Also decrement the ref count on the volume
 817                     //
 818
 819                     ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
 820
 821                     InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
 822
 823                     AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
 824                                   AFS_TRACE_LEVEL_VERBOSE,
 825                                   "AFSLocateNameEntry Decrement2 count on volume %08lX Cnt %d\n",
 826                                   pCurrentVolume,
 827                                   pCurrentVolume->VolumeReferenceCount);
 828
 829                     AFSReleaseResource( pCurrentVolume->VolumeLock);
 830
 831                     ntStatus = AFSBuildMountPointTarget( AuthGroup,
 832                                                          pDirEntry,
 833                                                          &pCurrentVolume);
 834
 835                     if( !NT_SUCCESS( ntStatus))
 836                     {
 837
 838                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 839                                       AFS_TRACE_LEVEL_ERROR,
 840                                       "AFSLocateNameEntry (FO: %08lX) Failed to build MP target for parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 841                                       FileObject,
 842                                       &pDirEntry->NameInformation.FileName,
 843                                       pCurrentObject->FileId.Cell,
 844                                       pCurrentObject->FileId.Volume,
 845                                       pCurrentObject->FileId.Vnode,
 846                                       pCurrentObject->FileId.Unique,
 847                                       ntStatus);
 848
 849                         //
 850                         // We already decremented the current volume above
 851                         //
 852
 853                         bReleaseCurrentVolume = FALSE;
 854
 855                         try_return( ntStatus = STATUS_ACCESS_DENIED);
 856                     }
 857
 858                     ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
 859
 860                     ASSERT( ExIsResourceAcquiredLite( pCurrentVolume->VolumeLock));
 861
 862                     //
 863                     // Replace the current name for the mp with the volume root of the target
 864                     //
 865
 866                     AFSReplaceCurrentElement( pNameArray,
 867                                               pCurrentVolume->DirectoryCB);
 868
 869                     //
 870                     // We want to restart processing here on the new parent ...
 871                     // Deref and ref count the entries
 872                     //
 873
 874                     InterlockedDecrement( &pDirEntry->OpenReferenceCount);
 875
 876                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 877                                   AFS_TRACE_LEVEL_VERBOSE,
 878                                   "AFSLocateNameEntry Decrement3 count on %wZ DE %p Ccb %p Cnt %d\n",
 879                                   &pDirEntry->NameInformation.FileName,
 880                                   pDirEntry,
 881                                   NULL,
 882                                   pDirEntry->OpenReferenceCount);
 883
 884                     pDirEntry = pCurrentVolume->DirectoryCB;
 885
 886                     InterlockedIncrement( &pDirEntry->OpenReferenceCount);
 887
 888                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
 889                                   AFS_TRACE_LEVEL_VERBOSE,
 890                                   "AFSLocateNameEntry Increment3 count on %wZ DE %p Ccb %p Cnt %d\n",
 891                                   &pDirEntry->NameInformation.FileName,
 892                                   pDirEntry,
 893                                   NULL,
 894                                   pDirEntry->OpenReferenceCount);
 895
 896                     pParentDirEntry = NULL;
 897
 898                     //
 899                     // Increment our link count
 900                     //
 901
 902                     InterlockedIncrement( &pNameArray->LinkCount);
 903
 904                     continue;
 905                 }
 906
 907                 case AFS_FILE_TYPE_DFSLINK:
 908                 {
 909
 910                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_DFS_LINK_EVAL))
 911                     {
 912
 913                         //
 914                         // Pass back the directory entries
 915                         //
 916
 917                         *ParentDirectoryCB = pParentDirEntry;
 918
 919                         *DirectoryCB = pDirEntry;
 920
 921                         *VolumeCB = pCurrentVolume;
 922
 923                         *RootPathName = uniFullPathName;
 924
 925                         try_return( ntStatus);
 926                     }
 927
 928                     //
 929                     // This is a DFS link so we need to update the file name and return STATUS_REPARSE to the
 930                     // system for it to reevaluate it
 931                     //
 932
 933                     if( FileObject != NULL)
 934                     {
 935
 936                         ntStatus = AFSProcessDFSLink( pDirEntry,
 937                                                       FileObject,
 938                                                       &uniRemainingPath);
 939                     }
 940                     else
 941                     {
 942
 943                         //
 944                         // This is where we have been re-entered from an NP evaluation call via the BuildBranch()
 945                         // routine.
 946                         //
 947
 948                         ntStatus = STATUS_INVALID_PARAMETER;
 949                     }
 950
 951                     if( ntStatus != STATUS_SUCCESS &&
 952                         ntStatus != STATUS_REPARSE)
 953                     {
 954
 955                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 956                                       AFS_TRACE_LEVEL_ERROR,
 957                                       "AFSLocateNameEntry (FO: %08lX) Failed to process DFSLink parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 958                                       FileObject,
 959                                       &pDirEntry->NameInformation.FileName,
 960                                       pCurrentObject->FileId.Cell,
 961                                       pCurrentObject->FileId.Volume,
 962                                       pCurrentObject->FileId.Vnode,
 963                                       pCurrentObject->FileId.Unique,
 964                                       ntStatus);
 965                     }
 966
 967                     try_return( ntStatus);
 968                 }
 969
 970                 case AFS_FILE_TYPE_UNKNOWN:
 971                 case AFS_FILE_TYPE_INVALID:
 972                 {
 973
 974                     //
 975                     // Something was not processed ...
 976                     //
 977
 978                     try_return( ntStatus = STATUS_ACCESS_DENIED);
 979                 }
 980
 981             }   /* end of switch */
 982
 983             //
 984             // If the parent is not initialized then do it now
 985             //
 986
 987             if( pCurrentObject->FileType == AFS_FILE_TYPE_DIRECTORY &&
 988                 !BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
 989             {
 990
 991                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
 992                               AFS_TRACE_LEVEL_VERBOSE,
 993                               "AFSLocateNameEntry (FO: %08lX) Enumerating parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 994                               FileObject,
 995                               &pDirEntry->NameInformation.FileName,
 996                               pCurrentObject->FileId.Cell,
 997                               pCurrentObject->FileId.Volume,
 998                               pCurrentObject->FileId.Vnode,
 999                               pCurrentObject->FileId.Unique);
1000
1001                 AFSAcquireExcl( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock,
1002                                 TRUE);
1003
1004                 if( !BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
1005                 {
1006
1007                     ntStatus = AFSEnumerateDirectory( AuthGroup,
1008                                                       pCurrentObject,
1009                                                       TRUE);
1010
1011                     if( !NT_SUCCESS( ntStatus))
1012                     {
1013
1014                         AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1015
1016                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1017                                       AFS_TRACE_LEVEL_ERROR,
1018                                       "AFSLocateNameEntry (FO: %08lX) Failed to enumerate parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1019                                       FileObject,
1020                                       &pDirEntry->NameInformation.FileName,
1021                                       pCurrentObject->FileId.Cell,
1022                                       pCurrentObject->FileId.Volume,
1023                                       pCurrentObject->FileId.Vnode,
1024                                       pCurrentObject->FileId.Unique,
1025                                       ntStatus);
1026
1027                         try_return( ntStatus);
1028                     }
1029
1030                     SetFlag( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED);
1031                 }
1032
1033                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1034             }
1035             else if( pCurrentObject->FileType == AFS_FILE_TYPE_FILE)
1036             {
1037
1038                 if( uniPathName.Length > 0)
1039                 {
1040
1041                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1042                                   AFS_TRACE_LEVEL_ERROR,
1043                                   "AFSLocateNameEntry (FO: %08lX) Encountered file node %wZ FID %08lX-%08lX-%08lX-%08lX in path processing\n",
1044                                   FileObject,
1045                                   &pDirEntry->NameInformation.FileName,
1046                                   pCurrentObject->FileId.Cell,
1047                                   pCurrentObject->FileId.Volume,
1048                                   pCurrentObject->FileId.Vnode,
1049                                   pCurrentObject->FileId.Unique);
1050
1051                     // The proper error code to return would be STATUS_OBJECT_PATH_INVALID because
1052                     // one of the components of the path is not a directory.  However, returning
1053                     // that error prevents IIS 7 and 7.5 from being able to serve data out of AFS.
1054                     // Instead IIS insists on treating the target file as if it is a directory containing
1055                     // a potential web.config file.  NTFS and LanMan return STATUS_OBJECT_PATH_NOT_FOUND.
1056                     // AFS will follow suit.
1057
1058                     ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1059                 }
1060                 else
1061                 {
1062
1063                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1064                                   AFS_TRACE_LEVEL_VERBOSE,
1065                                   "AFSLocateNameEntry (FO: %08lX) Returning file %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1066                                   FileObject,
1067                                   &pDirEntry->NameInformation.FileName,
1068                                   pCurrentObject->FileId.Cell,
1069                                   pCurrentObject->FileId.Volume,
1070                                   pCurrentObject->FileId.Vnode,
1071                                   pCurrentObject->FileId.Unique);
1072
1073                     //
1074                     // Pass back the directory entries
1075                     //
1076
1077                     *ParentDirectoryCB = pParentDirEntry;
1078
1079                     *DirectoryCB = pDirEntry;
1080
1081                     *VolumeCB = pCurrentVolume;
1082
1083                     *RootPathName = uniFullPathName;
1084                 }
1085
1086                 try_return( ntStatus);
1087             }
1088
1089             //
1090             // If we are at the end of the processing, set our returned information and get out
1091             //
1092
1093             if( uniPathName.Length == 0)
1094             {
1095
1096                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1097                               AFS_TRACE_LEVEL_VERBOSE,
1098                               "AFSLocateNameEntry (FO: %08lX) Completed processing returning %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1099                               FileObject,
1100                               &pDirEntry->NameInformation.FileName,
1101                               pCurrentObject->FileId.Cell,
1102                               pCurrentObject->FileId.Volume,
1103                               pCurrentObject->FileId.Vnode,
1104                               pCurrentObject->FileId.Unique);
1105
1106                 //
1107                 // Pass back the directory entries
1108                 //
1109
1110                 *ParentDirectoryCB = pParentDirEntry;
1111
1112                 *DirectoryCB = pDirEntry;
1113
1114                 *VolumeCB = pCurrentVolume;
1115
1116                 *RootPathName = uniFullPathName;
1117
1118                 try_return( ntStatus);
1119             }
1120
1121             //
1122             // We may have returned to the top of the while( TRUE)
1123             //
1124             if( bSubstituteName &&
1125                 uniSearchName.Buffer != NULL)
1126             {
1127
1128                 AFSExFreePool( uniSearchName.Buffer);
1129
1130                 bSubstituteName = FALSE;
1131
1132                 uniSearchName.Length = uniSearchName.MaximumLength = 0;
1133                 uniSearchName.Buffer = NULL;
1134             }
1135
1136             ulSubstituteIndex = 1;
1137
1138             ntStatus = STATUS_SUCCESS;
1139
1140             //
1141             // Get the next component name
1142             //
1143
1144             FsRtlDissectName( uniPathName,
1145                               &uniComponentName,
1146                               &uniRemainingPath);
1147
1148             //
1149             // Check for the . and .. in the path
1150             //
1151
1152             if( RtlCompareUnicodeString( &uniComponentName,
1153                                          &uniNoOpName,
1154                                          TRUE) == 0)
1155             {
1156
1157                 uniPathName = uniRemainingPath;
1158
1159                 continue;
1160             }
1161
1162             if( RtlCompareUnicodeString( &uniComponentName,
1163                                          &uniRelativeName,
1164                                          TRUE) == 0)
1165             {
1166
1167                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1168                               AFS_TRACE_LEVEL_VERBOSE,
1169                               "AFSLocateNameEntry (FO: %08lX) Backing up entry from %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1170                               FileObject,
1171                               &pDirEntry->NameInformation.FileName,
1172                               pCurrentObject->FileId.Cell,
1173                               pCurrentObject->FileId.Volume,
1174                               pCurrentObject->FileId.Vnode,
1175                               pCurrentObject->FileId.Unique);
1176
1177                 //
1178                 // Need to back up one entry in the name array
1179                 //
1180
1181                 InterlockedDecrement( &pDirEntry->OpenReferenceCount);
1182
1183                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1184                               AFS_TRACE_LEVEL_VERBOSE,
1185                               "AFSLocateNameEntry Decrement4 count on %wZ DE %p Ccb %p Cnt %d\n",
1186                               &pDirEntry->NameInformation.FileName,
1187                               pDirEntry,
1188                               NULL,
1189                               pDirEntry->OpenReferenceCount);
1190
1191                 pDirEntry = AFSBackupEntry( NameArray);
1192
1193                 if( pDirEntry == NULL)
1194                 {
1195
1196                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1197                                   AFS_TRACE_LEVEL_ERROR,
1198                                   "AFSLocateNameEntry AFSBackupEntry failed\n");
1199
1200                     try_return(ntStatus = STATUS_OBJECT_PATH_INVALID);
1201                 }
1202
1203                 InterlockedIncrement( &pDirEntry->OpenReferenceCount);
1204
1205                 if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_ROOT_VOLUME))
1206                 {
1207
1208                     pParentDirEntry = NULL;
1209                 }
1210                 else
1211                 {
1212
1213                     pParentDirEntry = AFSGetParentEntry( pNameArray);
1214
1215                     ASSERT( pParentDirEntry != pDirEntry);
1216                 }
1217
1218                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1219                               AFS_TRACE_LEVEL_VERBOSE,
1220                               "AFSLocateNameEntry Increment4 count on %wZ DE %p Ccb %p Cnt %d\n",
1221                               &pDirEntry->NameInformation.FileName,
1222                               pDirEntry,
1223                               NULL,
1224                               pDirEntry->OpenReferenceCount);
1225
1226                 uniPathName = uniRemainingPath;
1227
1228                 continue;
1229             }
1230
1231             //
1232             // Update our pointers
1233             //
1234
1235             pParentDirEntry = pDirEntry;
1236
1237             pDirEntry = NULL;
1238
1239             uniSearchName = uniComponentName;
1240
1241             while( pDirEntry == NULL)
1242             {
1243
1244                 //
1245                 // If the SearchName contains @SYS then we perform the substitution.
1246                 // If there is no substitution we give up.
1247                 //
1248
1249                 if( !bSubstituteName &&
1250                     FsRtlIsNameInExpression( &uniSysName,
1251                                              &uniSearchName,
1252                                              TRUE,
1253                                              NULL))
1254                 {
1255
1256                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1257                                   AFS_TRACE_LEVEL_VERBOSE_2,
1258                                   "AFSLocateNameEntry (FO: %08lX) Processing @SYS substitution for %wZ Index %08lX\n",
1259                                   FileObject,
1260                                   &uniComponentName,
1261                                   ulSubstituteIndex);
1262
1263                     ntStatus = AFSSubstituteSysName( &uniComponentName,
1264                                                      &uniSearchName,
1265                                                      ulSubstituteIndex);
1266
1267                     if ( NT_SUCCESS( ntStatus))
1268                     {
1269
1270                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1271                                       AFS_TRACE_LEVEL_VERBOSE_2,
1272                                       "AFSLocateNameEntry (FO: %08lX) Located substitution %wZ for %wZ Index %08lX\n",
1273                                       FileObject,
1274                                       &uniSearchName,
1275                                       &uniComponentName,
1276                                       ulSubstituteIndex);
1277
1278                         //
1279                         // Go reparse the name again
1280                         //
1281
1282                         bSubstituteName = TRUE;
1283
1284                         ulSubstituteIndex++; // For the next entry, if needed
1285
1286                         continue;   // while( pDirEntry == NULL)
1287                     }
1288                     else
1289                     {
1290
1291                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1292                                       AFS_TRACE_LEVEL_ERROR,
1293                                       "AFSLocateNameEntry (FO: %08lX) Failed to locate substitute string for %wZ Index %08lX Status %08lX\n",
1294                                       FileObject,
1295                                       &uniComponentName,
1296                                       ulSubstituteIndex,
1297                                       ntStatus);
1298
1299                         if( ntStatus == STATUS_OBJECT_NAME_NOT_FOUND)
1300                         {
1301
1302                             //
1303                             // Pass back the directory entries
1304                             //
1305
1306                             *ParentDirectoryCB = pParentDirEntry;
1307
1308                             *DirectoryCB = NULL;
1309
1310                             *VolumeCB = pCurrentVolume;
1311
1312                             if( ComponentName != NULL)
1313                             {
1314
1315                                 *ComponentName = uniComponentName;
1316                             }
1317
1318                             *RootPathName = uniFullPathName;
1319                         }
1320
1321                         //
1322                         // We can't possibly have a pDirEntry since the lookup failed
1323                         //
1324                         try_return( ntStatus);
1325                     }
1326                 }
1327
1328                 //
1329                 // Generate the CRC on the node and perform a case sensitive lookup
1330                 //
1331
1332                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1333                               AFS_TRACE_LEVEL_VERBOSE_2,
1334                               "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ case sensitive\n",
1335                               FileObject,
1336                               &uniSearchName);
1337
1338                 ulCRC = AFSGenerateCRC( &uniSearchName,
1339                                         FALSE);
1340
1341                 AFSAcquireShared( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
1342                                   TRUE);
1343
1344                 AFSLocateCaseSensitiveDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
1345                                                 ulCRC,
1346                                                 &pDirEntry);
1347
1348                 if( pDirEntry == NULL)
1349                 {
1350
1351                     //
1352                     // Missed so perform a case insensitive lookup
1353                     //
1354
1355                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1356                                   AFS_TRACE_LEVEL_VERBOSE_2,
1357                                   "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ case insensitive\n",
1358                                   FileObject,
1359                                   &uniSearchName);
1360
1361                     ulCRC = AFSGenerateCRC( &uniSearchName,
1362                                             TRUE);
1363
1364                     AFSLocateCaseInsensitiveDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
1365                                                       ulCRC,
1366                                                       &pDirEntry);
1367
1368                     if( pDirEntry == NULL)
1369                     {
1370
1371                         //
1372                         // OK, if this component is a valid short name then try
1373                         // a lookup in the short name tree
1374                         //
1375
1376                         if( RtlIsNameLegalDOS8Dot3( &uniSearchName,
1377                                                     NULL,
1378                                                     NULL))
1379                         {
1380
1381                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1382                                           AFS_TRACE_LEVEL_VERBOSE_2,
1383                                           "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ short name\n",
1384                                           FileObject,
1385                                           &uniSearchName);
1386
1387                             AFSLocateShortNameDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.ShortNameTree,
1388                                                         ulCRC,
1389                                                         &pDirEntry);
1390                         }
1391
1392                         if( pDirEntry == NULL)
1393                         {
1394
1395                             //
1396                             // If we substituted a name then reset our search name and try again
1397                             //
1398
1399                             if( bSubstituteName)
1400                             {
1401
1402                                 AFSExFreePool( uniSearchName.Buffer);
1403
1404                                 uniSearchName = uniComponentName;
1405
1406                                 bSubstituteName = FALSE;
1407
1408                                 AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1409
1410                                 continue;       // while( pDirEntry == NULL)
1411                             }
1412
1413                             if( uniRemainingPath.Length > 0)
1414                             {
1415
1416                                 ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1417                             }
1418                             else
1419                             {
1420
1421                                 ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
1422
1423                                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1424                                               AFS_TRACE_LEVEL_VERBOSE,
1425                                               "AFSLocateNameEntry (FO: %08lX) Returning name not found for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1426                                               FileObject,
1427                                               &uniSearchName,
1428                                               pCurrentObject->FileId.Cell,
1429                                               pCurrentObject->FileId.Volume,
1430                                               pCurrentObject->FileId.Vnode,
1431                                               pCurrentObject->FileId.Unique);
1432
1433                                 //
1434                                 // Pass back the directory entries
1435                                 //
1436
1437                                 *ParentDirectoryCB = pParentDirEntry;
1438
1439                                 *DirectoryCB = NULL;
1440
1441                                 *VolumeCB = pCurrentVolume;
1442
1443                                 if( ComponentName != NULL)
1444                                 {
1445
1446                                     *ComponentName = uniComponentName;
1447                                 }
1448
1449                                 *RootPathName = uniFullPathName;
1450                             }
1451
1452                             AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1453
1454                             //
1455                             // Node name not found so get out
1456                             //
1457
1458                             try_return( ntStatus);  // while( pDirEntry == NULL)
1459                         }
1460                     }
1461                     else
1462                     {
1463
1464                         //
1465                         // Here we have a match on the case insensitive lookup for the name. If there
1466                         // Is more than one link entry for this node then fail the lookup request
1467                         //
1468
1469                         if( !BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD) ||
1470                             pDirEntry->CaseInsensitiveList.fLink != NULL)
1471                         {
1472
1473                             AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1474
1475                             try_return(ntStatus = STATUS_OBJECT_NAME_COLLISION);
1476                         }
1477                     }
1478                 }
1479
1480                 if( pDirEntry != NULL)
1481                 {
1482
1483                     //
1484                     // If the verify flag is set on the parent and the current entry is deleted
1485                     // revalidate the parent and search again.
1486                     //
1487
1488                     if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED) &&
1489                         BooleanFlagOn( pParentDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY))
1490                     {
1491
1492                         AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1493
1494                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1495                                       AFS_TRACE_LEVEL_VERBOSE,
1496                                       "AFSLocateNameEntry (FO: %08lX) Verifying(2) parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1497                                       FileObject,
1498                                       &pParentDirEntry->NameInformation.FileName,
1499                                       pParentDirEntry->ObjectInformation->FileId.Cell,
1500                                       pParentDirEntry->ObjectInformation->FileId.Volume,
1501                                       pParentDirEntry->ObjectInformation->FileId.Vnode,
1502                                       pParentDirEntry->ObjectInformation->FileId.Unique);
1503
1504                         ntStatus = AFSVerifyEntry( AuthGroup,
1505                                                    pParentDirEntry);
1506
1507                         if( !NT_SUCCESS( ntStatus))
1508                         {
1509
1510                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1511                                           AFS_TRACE_LEVEL_ERROR,
1512                                           "AFSLocateNameEntry (FO: %08lX) Failed to verify(2) parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1513                                           FileObject,
1514                                           &pParentDirEntry->NameInformation.FileName,
1515                                           pParentDirEntry->ObjectInformation->FileId.Cell,
1516                                           pParentDirEntry->ObjectInformation->FileId.Volume,
1517                                           pParentDirEntry->ObjectInformation->FileId.Vnode,
1518                                           pParentDirEntry->ObjectInformation->FileId.Unique,
1519                                           ntStatus);
1520
1521                             try_return( ntStatus);
1522                         }
1523
1524                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1525                                       AFS_TRACE_LEVEL_VERBOSE,
1526                                       "AFSLocateNameEntry (FO: %08lX) Reprocessing component %wZ in parent %wZ\n",
1527                                       FileObject,
1528                                       &uniSearchName,
1529                                       &pParentDirEntry->NameInformation.FileName);
1530
1531
1532                         pDirEntry = NULL;
1533
1534                         continue;
1535                     }
1536
1537                     //
1538                     // Increment our dir entry ref count
1539                     //
1540
1541                     InterlockedIncrement( &pDirEntry->OpenReferenceCount);
1542
1543                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1544                                   AFS_TRACE_LEVEL_VERBOSE,
1545                                   "AFSLocateNameEntry Increment5 count on %wZ DE %p Ccb %p Cnt %d\n",
1546                                   &pDirEntry->NameInformation.FileName,
1547                                   pDirEntry,
1548                                   NULL,
1549                                   pDirEntry->OpenReferenceCount);
1550                 }
1551
1552                 AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1553
1554             } // End while( pDirEntry == NULL)
1555
1556             //
1557             // If we have a dirEntry for this component, perform some basic validation on it
1558             //
1559
1560             if( pDirEntry != NULL &&
1561                 BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED))
1562             {
1563
1564                 pCurrentObject = pDirEntry->ObjectInformation;
1565
1566                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1567                               AFS_TRACE_LEVEL_ERROR,
1568                               "AFSLocateNameEntry (FO: %08lX) Deleted parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1569                               FileObject,
1570                               &pDirEntry->NameInformation.FileName,
1571                               pCurrentObject->FileId.Cell,
1572                               pCurrentObject->FileId.Volume,
1573                               pCurrentObject->FileId.Vnode,
1574                               pCurrentObject->FileId.Unique);
1575
1576                 //
1577                 // This entry was deleted through the invalidation call back so perform cleanup
1578                 // on the entry
1579                 //
1580
1581                 ASSERT( pCurrentObject->ParentObjectInformation != NULL);
1582
1583                 AFSAcquireExcl( pCurrentObject->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
1584                                 TRUE);
1585
1586                 AFSAcquireExcl( pCurrentObject->VolumeCB->ObjectInfoTree.TreeLock,
1587                                 TRUE);
1588
1589                 if( InterlockedDecrement( &pDirEntry->OpenReferenceCount) == 0)
1590                 {
1591
1592                     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1593                                   AFS_TRACE_LEVEL_VERBOSE,
1594                                   "AFSLocateNameEntry Deleting dir entry %08lX (%08lX) for %wZ\n",
1595                                   pDirEntry,
1596                                   pCurrentObject,
1597                                   &pDirEntry->NameInformation.FileName);
1598
1599                     //
1600                     // Remove and delete the directory entry from the parent list
1601                     //
1602
1603                     AFSDeleteDirEntry( pCurrentObject->ParentObjectInformation,
1604                                        pDirEntry);
1605
1606                     if( pCurrentObject->ObjectReferenceCount == 0)
1607                     {
1608
1609                         if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_INSERTED_HASH_TREE))
1610                         {
1611
1612                             AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1613                                           AFS_TRACE_LEVEL_VERBOSE,
1614                                           "AFSLocateNameEntry Removing object %08lX from volume tree\n",
1615                                           pCurrentObject);
1616
1617                             AFSRemoveHashEntry( &pCurrentObject->VolumeCB->ObjectInfoTree.TreeHead,
1618                                                 &pCurrentObject->TreeEntry);
1619
1620                             ClearFlag( pCurrentObject->Flags, AFS_OBJECT_INSERTED_HASH_TREE);
1621                         }
1622                     }
1623                 }
1624                 else
1625                 {
1626
1627                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1628                                   AFS_TRACE_LEVEL_VERBOSE,
1629                                   "AFSLocateNameEntry Setting DELETE flag in dir entry %p for %wZ\n",
1630                                   pDirEntry,
1631                                   &pDirEntry->NameInformation.FileName);
1632
1633                     SetFlag( pDirEntry->Flags, AFS_DIR_ENTRY_DELETED);
1634
1635                     AFSRemoveNameEntry( pCurrentObject->ParentObjectInformation,
1636                                         pDirEntry);
1637                 }
1638
1639                 AFSReleaseResource( pCurrentObject->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1640
1641                 AFSReleaseResource( pCurrentObject->VolumeCB->ObjectInfoTree.TreeLock);
1642
1643                 //
1644                 // We deleted the dir entry so check if there is any remaining portion
1645                 // of the name to process.
1646                 //
1647
1648                 if( uniRemainingPath.Length > 0)
1649                 {
1650                     ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1651                 }
1652                 else
1653                 {
1654
1655                     ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
1656
1657                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1658                                   AFS_TRACE_LEVEL_VERBOSE,
1659                                   "AFSLocateNameEntry (FO: %08lX) Returning name not found(2) for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1660                                   FileObject,
1661                                   &uniComponentName,
1662                                   pCurrentObject->FileId.Cell,
1663                                   pCurrentObject->FileId.Volume,
1664                                   pCurrentObject->FileId.Vnode,
1665                                   pCurrentObject->FileId.Unique);
1666
1667                     //
1668                     // Pass back the directory entries
1669                     //
1670
1671                     *ParentDirectoryCB = pParentDirEntry;
1672
1673                     *DirectoryCB = NULL;
1674
1675                     *VolumeCB = pCurrentVolume;
1676
1677                     if( ComponentName != NULL)
1678                     {
1679
1680                         *ComponentName = uniComponentName;
1681                     }
1682
1683                     *RootPathName = uniFullPathName;
1684                 }
1685             }
1686
1687             if( ntStatus != STATUS_SUCCESS)
1688             {
1689
1690                 try_return( ntStatus);
1691             }
1692
1693             //
1694             // Decrement the previous parent
1695             //
1696
1697             InterlockedDecrement( &pParentDirEntry->OpenReferenceCount);
1698
1699             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1700                           AFS_TRACE_LEVEL_VERBOSE,
1701                           "AFSLocateNameEntry Decrement5 count on Parent %wZ DE %p Ccb %p Cnt %d\n",
1702                           &pParentDirEntry->NameInformation.FileName,
1703                           pParentDirEntry,
1704                           NULL,
1705                           pParentDirEntry->OpenReferenceCount);
1706
1707             //
1708             // If we ended up substituting a name in the component then update
1709             // the full path and update the pointers
1710             //
1711
1712             if( bSubstituteName)
1713             {
1714
1715                 BOOLEAN bRelativeOpen = FALSE;
1716
1717                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1718                               AFS_TRACE_LEVEL_VERBOSE_2,
1719                               "AFSLocateNameEntry (FO: %08lX) Substituting %wZ into %wZ Index %08lX\n",
1720                               FileObject,
1721                               &uniSearchName,
1722                               &uniComponentName,
1723                               ulSubstituteIndex);
1724
1725                 if( FileObject != NULL &&
1726                     FileObject->RelatedFileObject != NULL)
1727                 {
1728
1729                     bRelativeOpen = TRUE;
1730                 }
1731
1732                 //
1733                 // AFSSubstituteNameInPath will replace the uniFullPathName.Buffer
1734                 // and free the prior Buffer contents but only if the fourth
1735                 // parameter is TRUE.
1736                 //
1737
1738                 ntStatus = AFSSubstituteNameInPath( &uniFullPathName,
1739                                                     &uniComponentName,
1740                                                     &uniSearchName,
1741                                                     &uniRemainingPath,
1742                                                     bRelativeOpen ||
1743                                                             bAllocatedSymLinkBuffer ||
1744                                                             bSubstitutedName);
1745
1746                 if( !NT_SUCCESS( ntStatus))
1747                 {
1748
1749                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1750                                   AFS_TRACE_LEVEL_ERROR,
1751                                   "AFSLocateNameEntry (FO: %08lX) Failure to substitute %wZ into %wZ Index %08lX Status %08lX\n",
1752                                   FileObject,
1753                                   &uniSearchName,
1754                                   &uniComponentName,
1755                                   ulSubstituteIndex,
1756                                   ntStatus);
1757
1758                     try_return( ntStatus);
1759                 }
1760
1761                 //
1762                 // We have substituted a name into the buffer so if we do this again for this
1763                 // path, we need to free up the buffer we allocated.
1764                 //
1765
1766                 bSubstitutedName = TRUE;
1767             }
1768
1769             //
1770             // Update the search parameters
1771             //
1772
1773             uniPathName = uniRemainingPath;
1774
1775             //
1776             // Check if the is a SymLink entry but has no Target FileID or Name. In this
1777             // case it might be a DFS Link so let's go and evaluate it to be sure
1778             //
1779
1780             if( pCurrentObject->FileType == AFS_FILE_TYPE_SYMLINK &&
1781                 pCurrentObject->TargetFileId.Vnode == 0 &&
1782                 pCurrentObject->TargetFileId.Unique == 0 &&
1783                 pDirEntry->NameInformation.TargetName.Length == 0)
1784             {
1785
1786                 ntStatus = AFSValidateSymLink( AuthGroup,
1787                                                pDirEntry);
1788
1789                 if( !NT_SUCCESS( ntStatus))
1790                 {
1791
1792                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1793                                   AFS_TRACE_LEVEL_ERROR,
1794                                   "AFSLocateNameEntry (FO: %08lX) Failed to evaluate possible DFS Link %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1795                                   FileObject,
1796                                   &pDirEntry->NameInformation.FileName,
1797                                   pCurrentObject->FileId.Cell,
1798                                   pCurrentObject->FileId.Volume,
1799                                   pCurrentObject->FileId.Vnode,
1800                                   pCurrentObject->FileId.Unique,
1801                                   ntStatus);
1802
1803                     try_return( ntStatus);
1804                 }
1805             }
1806
1807             //
1808             // Update the name array
1809             //
1810
1811             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1812                           AFS_TRACE_LEVEL_VERBOSE,
1813                           "AFSLocateNameEntry (FO: %08lX) Inserting name array entry %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1814                           FileObject,
1815                           &pDirEntry->NameInformation.FileName,
1816                           pCurrentObject->FileId.Cell,
1817                           pCurrentObject->FileId.Volume,
1818                           pCurrentObject->FileId.Vnode,
1819                           pCurrentObject->FileId.Unique);
1820
1821             ntStatus = AFSInsertNextElement( pNameArray,
1822                                              pDirEntry);
1823
1824             if( !NT_SUCCESS( ntStatus))
1825             {
1826
1827                 try_return( ntStatus);
1828             }
1829         }       // while (TRUE)
1830
1831 try_exit:
1832
1833         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1834                       AFS_TRACE_LEVEL_VERBOSE,
1835                       "AFSLocateNameEntry (FO: %08lX) Completed processing %wZ Status %08lX\n",
1836                       FileObject,
1837                       RootPathName,
1838                       ntStatus);
1839
1840         if( ( !NT_SUCCESS( ntStatus) &&
1841               ntStatus != STATUS_OBJECT_NAME_NOT_FOUND) ||
1842             ntStatus == STATUS_REPARSE)
1843         {
1844
1845             if( pDirEntry != NULL)
1846             {
1847
1848                 InterlockedDecrement( &pDirEntry->OpenReferenceCount);
1849
1850                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1851                               AFS_TRACE_LEVEL_VERBOSE,
1852                               "AFSLocateNameEntry Decrement6 count on %wZ DE %p Ccb %p Cnt %d\n",
1853                               &pDirEntry->NameInformation.FileName,
1854                               pDirEntry,
1855                               NULL,
1856                               pDirEntry->OpenReferenceCount);
1857             }
1858             else if( pParentDirEntry != NULL)
1859             {
1860
1861                 InterlockedDecrement( &pParentDirEntry->OpenReferenceCount);
1862
1863                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1864                               AFS_TRACE_LEVEL_VERBOSE,
1865                               "AFSLocateNameEntry Decrement7 count on %wZ DE %p Ccb %p Cnt %d\n",
1866                               &pParentDirEntry->NameInformation.FileName,
1867                               pParentDirEntry,
1868                               NULL,
1869                               pParentDirEntry->OpenReferenceCount);
1870             }
1871
1872             if( bReleaseCurrentVolume)
1873             {
1874
1875                 ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
1876
1877                 ASSERT( ExIsResourceAcquiredLite( pCurrentVolume->VolumeLock));
1878
1879                 InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
1880
1881                 AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
1882                               AFS_TRACE_LEVEL_VERBOSE,
1883                               "AFSLocateNameEntry Decrement3 count on volume %08lX Cnt %d\n",
1884                               pCurrentVolume,
1885                               pCurrentVolume->VolumeReferenceCount);
1886
1887                 AFSReleaseResource( pCurrentVolume->VolumeLock);
1888             }
1889
1890             if( RootPathName->Buffer != uniFullPathName.Buffer)
1891             {
1892
1893                 AFSExFreePool( uniFullPathName.Buffer);
1894             }
1895         }
1896         else
1897         {
1898
1899             if( *ParentDirectoryCB != NULL)
1900             {
1901
1902                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1903                               AFS_TRACE_LEVEL_VERBOSE,
1904                               "AFSLocateNameEntry Count on Parent %wZ DE %p Ccb %p Cnt %d\n",
1905                               &(*ParentDirectoryCB)->NameInformation.FileName,
1906                               *ParentDirectoryCB,
1907                               NULL,
1908                               (*ParentDirectoryCB)->OpenReferenceCount);
1909             }
1910
1911             if( *DirectoryCB != NULL)
1912             {
1913
1914                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1915                               AFS_TRACE_LEVEL_VERBOSE,
1916                               "AFSLocateNameEntry Count on %wZ DE %p Ccb %p Cnt %d\n",
1917                               &(*DirectoryCB)->NameInformation.FileName,
1918                               *DirectoryCB,
1919                               NULL,
1920                               (*DirectoryCB)->OpenReferenceCount);
1921             }
1922         }
1923
1924         if( bSubstituteName &&
1925             uniSearchName.Buffer != NULL)
1926         {
1927
1928             AFSExFreePool( uniSearchName.Buffer);
1929         }
1930     }
1931
1932     return ntStatus;
1933 }
1934
1935 NTSTATUS
1936 AFSCreateDirEntry( IN GUID            *AuthGroup,
1937                    IN AFSObjectInfoCB *ParentObjectInfo,
1938                    IN AFSDirectoryCB *ParentDirCB,
1939                    IN PUNICODE_STRING FileName,
1940                    IN PUNICODE_STRING ComponentName,
1941                    IN ULONG Attributes,
1942                    IN OUT AFSDirectoryCB **DirEntry)
1943 {
1944
1945     NTSTATUS ntStatus = STATUS_SUCCESS;
1946     AFSDirectoryCB *pDirNode = NULL;
1947     UNICODE_STRING uniShortName;
1948     LARGE_INTEGER liFileSize = {0,0};
1949
1950     __Enter
1951     {
1952
1953         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1954                       AFS_TRACE_LEVEL_VERBOSE_2,
1955                       "AFSCreateDirEntry Creating dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ Attribs %08lX\n",
1956                       &ParentDirCB->NameInformation.FileName,
1957                       ParentObjectInfo->FileId.Cell,
1958                       ParentObjectInfo->FileId.Volume,
1959                       ParentObjectInfo->FileId.Vnode,
1960                       ParentObjectInfo->FileId.Unique,
1961                       ComponentName,
1962                       Attributes);
1963
1964         //
1965         // OK, before inserting the node into the parent tree, issue
1966         // the request to the service for node creation
1967         // We will need to drop the lock on the parent node since the create
1968         // could cause a callback into the file system to invalidate it's cache
1969         //
1970
1971         ntStatus = AFSNotifyFileCreate( AuthGroup,
1972                                         ParentObjectInfo,
1973                                         &liFileSize,
1974                                         Attributes,
1975                                         ComponentName,
1976                                         &pDirNode);
1977
1978         //
1979         // If the returned status is STATUS_REPARSE then the entry exists
1980         // and we raced, get out.
1981
1982         if( ntStatus == STATUS_REPARSE)
1983         {
1984
1985             *DirEntry = pDirNode;
1986
1987             try_return( ntStatus = STATUS_SUCCESS);
1988         }
1989
1990         if( !NT_SUCCESS( ntStatus))
1991         {
1992
1993             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1994                           AFS_TRACE_LEVEL_ERROR,
1995                           "AFSCreateDirEntry Failed to create dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ Attribs %08lX Status %08lX\n",
1996                           &ParentDirCB->NameInformation.FileName,
1997                           ParentObjectInfo->FileId.Cell,
1998                           ParentObjectInfo->FileId.Volume,
1999                           ParentObjectInfo->FileId.Vnode,
2000                           ParentObjectInfo->FileId.Unique,
2001                           ComponentName,
2002                           Attributes,
2003                           ntStatus);
2004
2005             try_return( ntStatus);
2006         }
2007
2008         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2009                       AFS_TRACE_LEVEL_VERBOSE_2,
2010                       "AFSCreateDirEntry Inserting dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ\n",
2011                       &ParentDirCB->NameInformation.FileName,
2012                       ParentObjectInfo->FileId.Cell,
2013                       ParentObjectInfo->FileId.Volume,
2014                       ParentObjectInfo->FileId.Vnode,
2015                       ParentObjectInfo->FileId.Unique,
2016                       ComponentName);
2017
2018         //
2019         // Insert the directory node
2020         //
2021
2022         AFSInsertDirectoryNode( ParentObjectInfo,
2023                                 pDirNode,
2024                                 TRUE);
2025
2026         //
2027         // Pass back the dir entry
2028         //
2029
2030         *DirEntry = pDirNode;
2031
2032 try_exit:
2033
2034         NOTHING;
2035     }
2036
2037     return ntStatus;
2038 }
2039
2040 void
2041 AFSInsertDirectoryNode( IN AFSObjectInfoCB *ParentObjectInfo,
2042                         IN AFSDirectoryCB *DirEntry,
2043                         IN BOOLEAN InsertInEnumList)
2044 {
2045
2046     __Enter
2047     {
2048
2049         AFSAcquireExcl( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock,
2050                         TRUE);
2051
2052         //
2053         // Insert the node into the directory node tree
2054         //
2055
2056         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2057                       AFS_TRACE_LEVEL_VERBOSE,
2058                       "AFSInsertDirectoryNode Insert DE %p for %wZ Clearing NOT_IN flag\n",
2059                       DirEntry,
2060                       &DirEntry->NameInformation.FileName);
2061
2062         ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE);
2063
2064         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead == NULL)
2065         {
2066
2067             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead = DirEntry;
2068
2069             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2070                           AFS_TRACE_LEVEL_VERBOSE,
2071                           "AFSInsertDirectoryNode Insert DE %p to head of case sensitive tree for %wZ\n",
2072                           DirEntry,
2073                           &DirEntry->NameInformation.FileName);
2074         }
2075         else
2076         {
2077
2078             AFSInsertCaseSensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
2079                                             DirEntry);
2080
2081             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2082                           AFS_TRACE_LEVEL_VERBOSE,
2083                           "AFSInsertDirectoryNode Insert DE %p to case sensitive tree for %wZ\n",
2084                           DirEntry,
2085                           &DirEntry->NameInformation.FileName);
2086         }
2087
2088         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead == NULL)
2089         {
2090
2091             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead = DirEntry;
2092
2093             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD);
2094
2095             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2096                           AFS_TRACE_LEVEL_VERBOSE,
2097                           "AFSInsertDirectoryNode Insert DE %p to head of case insensitive tree for %wZ\n",
2098                           DirEntry,
2099                           &DirEntry->NameInformation.FileName);
2100         }
2101         else
2102         {
2103
2104             AFSInsertCaseInsensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
2105                                               DirEntry);
2106
2107             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2108                           AFS_TRACE_LEVEL_VERBOSE,
2109                           "AFSInsertDirectoryNode Insert DE %p to case sensitive tree for %wZ\n",
2110                           DirEntry,
2111                           &DirEntry->NameInformation.FileName);
2112         }
2113
2114         //
2115         // Into the shortname tree
2116         //
2117
2118         if( DirEntry->Type.Data.ShortNameTreeEntry.HashIndex != 0)
2119         {
2120
2121             if( ParentObjectInfo->Specific.Directory.ShortNameTree == NULL)
2122             {
2123
2124                 ParentObjectInfo->Specific.Directory.ShortNameTree = DirEntry;
2125
2126                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2127                               AFS_TRACE_LEVEL_VERBOSE,
2128                               "AFSInsertDirectoryNode Insert DE %p to head of shortname tree for %wZ\n",
2129                               DirEntry,
2130                               &DirEntry->NameInformation.FileName);
2131             }
2132             else
2133             {
2134
2135                 AFSInsertShortNameDirEntry( ParentObjectInfo->Specific.Directory.ShortNameTree,
2136                                             DirEntry);
2137
2138                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2139                               AFS_TRACE_LEVEL_VERBOSE,
2140                               "AFSInsertDirectoryNode Insert DE %p to shortname tree for %wZ\n",
2141                               DirEntry,
2142                               &DirEntry->NameInformation.FileName);
2143             }
2144         }
2145
2146         if( InsertInEnumList)
2147         {
2148
2149             //
2150             // And insert the node into the directory list
2151             //
2152
2153             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2154                           AFS_TRACE_LEVEL_VERBOSE,
2155                           "AFSInsertDirectoryNode Inserting entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lXStatus %08lX\n",
2156                           DirEntry,
2157                           &DirEntry->NameInformation.FileName,
2158                           DirEntry->ObjectInformation->FileId.Cell,
2159                           DirEntry->ObjectInformation->FileId.Volume,
2160                           DirEntry->ObjectInformation->FileId.Vnode,
2161                           DirEntry->ObjectInformation->FileId.Unique);
2162
2163             if( ParentObjectInfo->Specific.Directory.DirectoryNodeListHead == NULL)
2164             {
2165
2166                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = DirEntry;
2167             }
2168             else
2169             {
2170
2171                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail->ListEntry.fLink = (void *)DirEntry;
2172
2173                 DirEntry->ListEntry.bLink = (void *)ParentObjectInfo->Specific.Directory.DirectoryNodeListTail;
2174             }
2175
2176             ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = DirEntry;
2177
2178             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2179
2180             InterlockedIncrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2181
2182             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2183                           AFS_TRACE_LEVEL_VERBOSE,
2184                           "AFSInsertDirectoryNode Adding entry %wZ Inc Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2185                               &DirEntry->NameInformation.FileName,
2186                               ParentObjectInfo->Specific.Directory.DirectoryNodeCount,
2187                               ParentObjectInfo->FileId.Cell,
2188                               ParentObjectInfo->FileId.Volume,
2189                               ParentObjectInfo->FileId.Vnode,
2190                               ParentObjectInfo->FileId.Unique);
2191         }
2192
2193         AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2194     }
2195
2196     return;
2197 }
2198
2199 NTSTATUS
2200 AFSDeleteDirEntry( IN AFSObjectInfoCB *ParentObjectInfo,
2201                    IN AFSDirectoryCB *DirEntry)
2202 {
2203
2204     NTSTATUS ntStatus = STATUS_SUCCESS;
2205
2206     __Enter
2207     {
2208
2209         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2210                       AFS_TRACE_LEVEL_VERBOSE,
2211                       "AFSDeleteDirEntry Deleting dir entry in parent %08lX Entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2212                       ParentObjectInfo,
2213                       DirEntry,
2214                       &DirEntry->NameInformation.FileName,
2215                       DirEntry->ObjectInformation->FileId.Cell,
2216                       DirEntry->ObjectInformation->FileId.Volume,
2217                       DirEntry->ObjectInformation->FileId.Vnode,
2218                       DirEntry->ObjectInformation->FileId.Unique);
2219
2220         AFSRemoveDirNodeFromParent( ParentObjectInfo,
2221                                     DirEntry,
2222                                     TRUE);
2223
2224         //
2225         // Free up the name buffer if it was reallocated
2226         //
2227
2228         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_NAME_BUFFER))
2229         {
2230
2231             AFSExFreePool( DirEntry->NameInformation.FileName.Buffer);
2232         }
2233
2234         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_TARGET_NAME_BUFFER))
2235         {
2236
2237             AFSExFreePool( DirEntry->NameInformation.TargetName.Buffer);
2238         }
2239
2240         //
2241         // Dereference the object for this dir entry
2242         //
2243
2244         ASSERT( DirEntry->ObjectInformation->ObjectReferenceCount > 0);
2245
2246         InterlockedDecrement( &DirEntry->ObjectInformation->ObjectReferenceCount);
2247
2248         AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2249                       AFS_TRACE_LEVEL_VERBOSE,
2250                       "AFSDeleteDirEntry Decrement count on object %08lX Cnt %d\n",
2251                       DirEntry->ObjectInformation,
2252                       DirEntry->ObjectInformation->ObjectReferenceCount);
2253
2254         ExDeleteResourceLite( &DirEntry->NonPaged->Lock);
2255
2256         AFSExFreePool( DirEntry->NonPaged);
2257
2258         //
2259         // Free up the dir entry
2260         //
2261
2262         AFSExFreePool( DirEntry);
2263     }
2264
2265     return ntStatus;
2266 }
2267
2268 NTSTATUS
2269 AFSRemoveDirNodeFromParent( IN AFSObjectInfoCB *ParentObjectInfo,
2270                             IN AFSDirectoryCB *DirEntry,
2271                             IN BOOLEAN RemoveFromEnumList)
2272 {
2273
2274     NTSTATUS ntStatus = STATUS_SUCCESS;
2275
2276     __Enter
2277     {
2278
2279
2280         ASSERT( ExIsResourceAcquiredExclusiveLite( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock));
2281
2282         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2283                       AFS_TRACE_LEVEL_VERBOSE,
2284                       "AFSRemoveDirNodeFromParent Removing DirEntry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX from Parent %08lX\n",
2285                       DirEntry,
2286                       &DirEntry->NameInformation.FileName,
2287                       DirEntry->ObjectInformation->FileId.Cell,
2288                       DirEntry->ObjectInformation->FileId.Volume,
2289                       DirEntry->ObjectInformation->FileId.Vnode,
2290                       DirEntry->ObjectInformation->FileId.Unique,
2291                       ParentObjectInfo);
2292
2293         if( !BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE))
2294         {
2295
2296             AFSRemoveNameEntry( ParentObjectInfo,
2297                                 DirEntry);
2298         }
2299         else
2300         {
2301
2302             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2303                           AFS_TRACE_LEVEL_VERBOSE,
2304                           "AFSRemoveDirNodeFromParent DE %p for %wZ NOT removing entry due to flag set\n",
2305                           DirEntry,
2306                           &DirEntry->NameInformation.FileName);
2307
2308         }
2309
2310         if( RemoveFromEnumList &&
2311             BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST))
2312         {
2313
2314             //
2315             // And remove the entry from the enumeration list
2316             //
2317
2318             if( DirEntry->ListEntry.fLink == NULL)
2319             {
2320
2321                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = (AFSDirectoryCB *)DirEntry->ListEntry.bLink;
2322             }
2323             else
2324             {
2325
2326                 ((AFSDirectoryCB *)DirEntry->ListEntry.fLink)->ListEntry.bLink = DirEntry->ListEntry.bLink;
2327             }
2328
2329             if( DirEntry->ListEntry.bLink == NULL)
2330             {
2331
2332                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = (AFSDirectoryCB *)DirEntry->ListEntry.fLink;
2333             }
2334             else
2335             {
2336
2337                 ((AFSDirectoryCB *)DirEntry->ListEntry.bLink)->ListEntry.fLink = DirEntry->ListEntry.fLink;
2338             }
2339
2340             ASSERT( ParentObjectInfo->Specific.Directory.DirectoryNodeCount > 0);
2341
2342             InterlockedDecrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2343
2344             ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2345
2346             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2347                           AFS_TRACE_LEVEL_VERBOSE,
2348                           "AFSRemoveDirNodeFromParent Removing entry %wZ Dec Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2349                           &DirEntry->NameInformation.FileName,
2350                           ParentObjectInfo->Specific.Directory.DirectoryNodeCount,
2351                           ParentObjectInfo->FileId.Cell,
2352                           ParentObjectInfo->FileId.Volume,
2353                           ParentObjectInfo->FileId.Vnode,
2354                           ParentObjectInfo->FileId.Unique);
2355
2356             DirEntry->ListEntry.fLink = NULL;
2357             DirEntry->ListEntry.bLink = NULL;
2358         }
2359     }
2360
2361     return ntStatus;
2362 }
2363
2364 NTSTATUS
2365 AFSFixupTargetName( IN OUT PUNICODE_STRING FileName,
2366                     IN OUT PUNICODE_STRING TargetFileName)
2367 {
2368
2369     NTSTATUS ntStatus = STATUS_SUCCESS;
2370     UNICODE_STRING uniFileName;
2371
2372     __Enter
2373     {
2374
2375         //
2376         // We will process backwards from the end of the name looking
2377         // for the first \ we encounter
2378         //
2379
2380         uniFileName.Length = FileName->Length;
2381         uniFileName.MaximumLength = FileName->MaximumLength;
2382
2383         uniFileName.Buffer = FileName->Buffer;
2384
2385         while( TRUE)
2386         {
2387
2388             if( uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) - 1] == L'\\')
2389             {
2390
2391                 //
2392                 // Subtract one more character off of the filename if it is not the root
2393                 //
2394
2395                 if( uniFileName.Length > sizeof( WCHAR))
2396                 {
2397
2398                     uniFileName.Length -= sizeof( WCHAR);
2399                 }
2400
2401                 //
2402                 // Now build up the target name
2403                 //
2404
2405                 TargetFileName->Length = FileName->Length - uniFileName.Length;
2406
2407                 //
2408                 // If we are not on the root then fixup the name
2409                 //
2410
2411                 if( uniFileName.Length > sizeof( WCHAR))
2412                 {
2413
2414                     TargetFileName->Length -= sizeof( WCHAR);
2415
2416                     TargetFileName->Buffer = &uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) + 1];
2417                 }
2418                 else
2419                 {
2420
2421                     TargetFileName->Buffer = &uniFileName.Buffer[ uniFileName.Length/sizeof( WCHAR)];
2422                 }
2423
2424                 //
2425                 // Fixup the passed back filename length
2426                 //
2427
2428                 FileName->Length = uniFileName.Length;
2429
2430                 TargetFileName->MaximumLength = TargetFileName->Length;
2431
2432                 break;
2433             }
2434
2435             uniFileName.Length -= sizeof( WCHAR);
2436         }
2437     }
2438
2439     return ntStatus;
2440 }
2441
2442 NTSTATUS
2443 AFSParseName( IN PIRP Irp,
2444               IN GUID *AuthGroup,
2445               OUT PUNICODE_STRING FileName,
2446               OUT PUNICODE_STRING ParsedFileName,
2447               OUT PUNICODE_STRING RootFileName,
2448               OUT ULONG *ParseFlags,
2449               OUT AFSVolumeCB   **VolumeCB,
2450               OUT AFSDirectoryCB **ParentDirectoryCB,
2451               OUT AFSNameArrayHdr **NameArray)
2452 {
2453
2454     NTSTATUS            ntStatus = STATUS_SUCCESS;
2455     PIO_STACK_LOCATION  pIrpSp = IoGetCurrentIrpStackLocation( Irp);
2456     AFSDeviceExt       *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2457     UNICODE_STRING      uniFullName, uniComponentName, uniRemainingPath;
2458     ULONG               ulCRC = 0;
2459     AFSDirectoryCB     *pDirEntry = NULL, *pShareDirEntry = NULL, *pTargetDirEntry = NULL;
2460     USHORT              usIndex = 0, usDriveIndex = 0;
2461     AFSCcb             *pRelatedCcb = NULL;
2462     AFSNameArrayHdr    *pNameArray = NULL, *pRelatedNameArray = NULL;
2463     USHORT              usComponentIndex = 0;
2464     USHORT              usComponentLength = 0;
2465     AFSVolumeCB        *pVolumeCB = NULL;
2466     AFSFcb             *pRelatedFcb = NULL;
2467     BOOLEAN             bReleaseTreeLock = FALSE;
2468     BOOLEAN             bIsAllShare = FALSE;
2469
2470     __Enter
2471     {
2472
2473         //
2474         // Indicate we are opening a root ...
2475         //
2476
2477         *ParseFlags = AFS_PARSE_FLAG_ROOT_ACCESS;
2478
2479         if( pIrpSp->FileObject->RelatedFileObject != NULL)
2480         {
2481
2482             pRelatedFcb = (AFSFcb *)pIrpSp->FileObject->RelatedFileObject->FsContext;
2483
2484             pRelatedCcb = (AFSCcb *)pIrpSp->FileObject->RelatedFileObject->FsContext2;
2485
2486             pRelatedNameArray = pRelatedCcb->NameArray;
2487
2488             uniFullName = pIrpSp->FileObject->FileName;
2489
2490             ASSERT( pRelatedFcb != NULL);
2491
2492             //
2493             // No wild cards in the name
2494             //
2495
2496             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2497                           AFS_TRACE_LEVEL_VERBOSE_2,
2498                           "AFSParseName (%08lX) Relative open for %wZ FID %08lX-%08lX-%08lX-%08lX component %wZ\n",
2499                           Irp,
2500                           &pRelatedCcb->DirectoryCB->NameInformation.FileName,
2501                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Cell,
2502                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Volume,
2503                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Vnode,
2504                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Unique,
2505                           &uniFullName);
2506
2507             if( FsRtlDoesNameContainWildCards( &uniFullName))
2508             {
2509
2510                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2511                               AFS_TRACE_LEVEL_ERROR,
2512                               "AFSParseName (%08lX) Component %wZ contains wild cards\n",
2513                               Irp,
2514                               &uniFullName);
2515
2516                 try_return( ntStatus = STATUS_OBJECT_NAME_INVALID);
2517             }
2518
2519             pVolumeCB = pRelatedFcb->ObjectInformation->VolumeCB;
2520
2521             pDirEntry = pRelatedCcb->DirectoryCB;
2522
2523             *FileName = pIrpSp->FileObject->FileName;
2524
2525             //
2526             // Grab the root node exclusive before returning
2527             //
2528
2529             AFSAcquireExcl( pVolumeCB->VolumeLock,
2530                             TRUE);
2531
2532             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID) ||
2533                 BooleanFlagOn( pVolumeCB->Flags, AFS_VOLUME_FLAGS_OFFLINE))
2534             {
2535
2536                 //
2537                 // The volume has been taken off line so fail the access
2538                 //
2539
2540                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2541                               AFS_TRACE_LEVEL_ERROR,
2542                               "AFSParseName (%08lX) Volume %08lX:%08lX OFFLINE/INVALID\n",
2543                               Irp,
2544                               pVolumeCB->ObjectInformation.FileId.Cell,
2545                               pVolumeCB->ObjectInformation.FileId.Volume);
2546
2547                 AFSReleaseResource( pVolumeCB->VolumeLock);
2548
2549                 try_return( ntStatus = STATUS_DEVICE_NOT_READY);
2550             }
2551
2552             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_VERIFY))
2553             {
2554
2555                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2556                               AFS_TRACE_LEVEL_VERBOSE,
2557                               "AFSParseName (%08lX) Verifying root of volume %08lX:%08lX\n",
2558                               Irp,
2559                               pVolumeCB->ObjectInformation.FileId.Cell,
2560                               pVolumeCB->ObjectInformation.FileId.Volume);
2561
2562                 ntStatus = AFSVerifyVolume( (ULONGLONG)PsGetCurrentProcessId(),
2563                                             pVolumeCB);
2564
2565                 if( !NT_SUCCESS( ntStatus))
2566                 {
2567
2568                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2569                                   AFS_TRACE_LEVEL_ERROR,
2570                                   "AFSParseName (%08lX) Failed verification of root Status %08lX\n",
2571                                   Irp,
2572                                   ntStatus);
2573
2574                     AFSReleaseResource( pVolumeCB->VolumeLock);
2575
2576                     try_return( ntStatus);
2577                 }
2578             }
2579
2580             AFSConvertToShared( pVolumeCB->VolumeLock);
2581
2582             if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY))
2583             {
2584
2585                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2586                               AFS_TRACE_LEVEL_VERBOSE,
2587                               "AFSParseName (%08lX) Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2588                               Irp,
2589                               &pDirEntry->NameInformation.FileName,
2590                               pDirEntry->ObjectInformation->FileId.Cell,
2591                               pDirEntry->ObjectInformation->FileId.Volume,
2592                               pDirEntry->ObjectInformation->FileId.Vnode,
2593                               pDirEntry->ObjectInformation->FileId.Unique);
2594
2595                 ntStatus = AFSVerifyEntry( AuthGroup,
2596                                            pDirEntry);
2597
2598                 if( !NT_SUCCESS( ntStatus))
2599                 {
2600
2601                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2602                                   AFS_TRACE_LEVEL_VERBOSE,
2603                                   "AFSParseName (%08lX) Failed verification of parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
2604                                   Irp,
2605                                   &pDirEntry->NameInformation.FileName,
2606                                   pDirEntry->ObjectInformation->FileId.Cell,
2607                                   pDirEntry->ObjectInformation->FileId.Volume,
2608                                   pDirEntry->ObjectInformation->FileId.Vnode,
2609                                   pDirEntry->ObjectInformation->FileId.Unique,
2610                                   ntStatus);
2611
2612                     AFSReleaseResource( pVolumeCB->VolumeLock);
2613
2614                     try_return( ntStatus);
2615                 }
2616             }
2617
2618             //
2619             // Create our full path name buffer
2620             //
2621
2622             uniFullName.MaximumLength = pRelatedCcb->FullFileName.Length +
2623                                                     sizeof( WCHAR) +
2624                                                     pIrpSp->FileObject->FileName.Length +
2625                                                     sizeof( WCHAR);
2626
2627             uniFullName.Length = 0;
2628
2629             uniFullName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
2630                                                                     uniFullName.MaximumLength,
2631                                                                     AFS_NAME_BUFFER_THREE_TAG);
2632
2633             if( uniFullName.Buffer == NULL)
2634             {
2635
2636                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2637                               AFS_TRACE_LEVEL_ERROR,
2638                               "AFSParseName (%08lX) Failed to allocate full name buffer\n",
2639                               Irp);
2640
2641                 AFSReleaseResource( pVolumeCB->VolumeLock);
2642
2643                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2644             }
2645
2646             RtlZeroMemory( uniFullName.Buffer,
2647                            uniFullName.MaximumLength);
2648
2649             RtlCopyMemory( uniFullName.Buffer,
2650                            pRelatedCcb->FullFileName.Buffer,
2651                            pRelatedCcb->FullFileName.Length);
2652
2653             uniFullName.Length = pRelatedCcb->FullFileName.Length;
2654
2655             usComponentIndex = (USHORT)(uniFullName.Length/sizeof( WCHAR));
2656
2657             usComponentLength = pIrpSp->FileObject->FileName.Length;
2658
2659             if( uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR)) - 1] != L'\\' &&
2660                 pIrpSp->FileObject->FileName.Length > 0 &&
2661                 pIrpSp->FileObject->FileName.Buffer[ 0] != L'\\' &&
2662                 pIrpSp->FileObject->FileName.Buffer[ 0] != L':')
2663             {
2664
2665                 uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR))] = L'\\';
2666
2667                 uniFullName.Length += sizeof( WCHAR);
2668
2669                 usComponentLength += sizeof( WCHAR);
2670             }
2671
2672             if( pIrpSp->FileObject->FileName.Length > 0)
2673             {
2674
2675                 RtlCopyMemory( &uniFullName.Buffer[ uniFullName.Length/sizeof( WCHAR)],
2676                                pIrpSp->FileObject->FileName.Buffer,
2677                                pIr\epSp->FileObject->FileName.Length);
2678
2679                 uniFullName.Length += pIrpSp->FileObject->FileName.Length;
2680             }
2681
2682             *RootFileName = uniFullName;
2683
2684             //
2685             // We populate up to the current parent
2686             //
2687
2688             if( pRelatedNameArray == NULL)
2689             {
2690
2691                 //
2692                 // Init and populate our name array
2693                 //
2694
2695                 pNameArray = AFSInitNameArray( NULL,
2696                                                0);
2697
2698                 if( pNameArray == NULL)
2699                 {
2700
2701                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2702                                   AFS_TRACE_LEVEL_VERBOSE,
2703                                   "AFSParseName (%08lX) Failed to initialize name array\n",
2704                                   Irp);
2705
2706                     AFSExFreePool( uniFullName.Buffer);
2707
2708                     AFSReleaseResource( pVolumeCB->VolumeLock);
2709
2710                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2711                 }
2712
2713                 ntStatus = AFSPopulateNameArray( pNameArray,
2714                                                  NULL,
2715                                                  pRelatedCcb->DirectoryCB);
2716             }
2717             else
2718             {
2719
2720                 //
2721                 // Init and populate our name array
2722                 //
2723
2724                 pNameArray = AFSInitNameArray( NULL,
2725                                                pRelatedNameArray->MaxElementCount);
2726
2727                 if( pNameArray == NULL)
2728                 {
2729
2730                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2731                                   AFS_TRACE_LEVEL_VERBOSE,
2732                                   "AFSParseName (%08lX) Failed to initialize name array\n",
2733                                   Irp);
2734
2735                     AFSExFreePool( uniFullName.Buffer);
2736
2737                     AFSReleaseResource( pVolumeCB->VolumeLock);
2738
2739                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2740                 }
2741
2742                 ntStatus = AFSPopulateNameArrayFromRelatedArray( pNameArray,
2743                                                                  pRelatedNameArray,
2744                                                                  pRelatedCcb->DirectoryCB);
2745             }
2746
2747             if( !NT_SUCCESS( ntStatus))
2748             {
2749
2750                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2751                               AFS_TRACE_LEVEL_VERBOSE,
2752                               "AFSParseName (%08lX) Failed to populate name array\n",
2753                               Irp);
2754
2755                 AFSExFreePool( uniFullName.Buffer);
2756
2757                 AFSReleaseResource( pVolumeCB->VolumeLock);
2758
2759                 try_return( ntStatus);
2760             }
2761
2762             ParsedFileName->Length = usComponentLength;
2763             ParsedFileName->MaximumLength = uniFullName.MaximumLength;
2764
2765             ParsedFileName->Buffer = &uniFullName.Buffer[ usComponentIndex];
2766
2767             //
2768             // Indicate to caller that RootFileName must be freed
2769             //
2770
2771             SetFlag( *ParseFlags, AFS_PARSE_FLAG_FREE_FILE_BUFFER);
2772
2773             *NameArray = pNameArray;
2774
2775             *VolumeCB = pVolumeCB;
2776
2777             //
2778             // Increment our volume reference count
2779             //
2780
2781             InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
2782
2783             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
2784                           AFS_TRACE_LEVEL_VERBOSE,
2785                           "AFSParseName Increment count on volume %08lX Cnt %d\n",
2786                           pVolumeCB,
2787                           pVolumeCB->VolumeReferenceCount);
2788
2789             *ParentDirectoryCB = pDirEntry;
2790
2791             InterlockedIncrement( &pDirEntry->OpenReferenceCount);
2792
2793             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
2794                           AFS_TRACE_LEVEL_VERBOSE,
2795                           "AFSParseName Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
2796                           &pDirEntry->NameInformation.FileName,
2797                           pDirEntry,
2798                           NULL,
2799                           pDirEntry->OpenReferenceCount);
2800
2801             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2802                           AFS_TRACE_LEVEL_VERBOSE_2,
2803                           "AFSParseName (%08lX) Returning full name %wZ\n",
2804                           Irp,
2805                           &uniFullName);
2806
2807             try_return( ntStatus);
2808         }
2809
2810         //
2811         // No wild cards in the name
2812         //
2813
2814         uniFullName = pIrpSp->FileObject->FileName;
2815
2816         if( FsRtlDoesNameContainWildCards( &uniFullName) ||
2817             uniFullName.Length < AFSServerName.Length)
2818         {
2819
2820             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2821                           AFS_TRACE_LEVEL_ERROR,
2822                           "AFSParseName (%08lX) Name %wZ contains wild cards or too short\n",
2823                           Irp,
2824                           &uniFullName);
2825
2826             try_return( ntStatus = STATUS_OBJECT_NAME_INVALID);
2827         }
2828
2829         //
2830         // The name is a fully qualified name. Parse out the server/share names and
2831         // point to the root qualified name
2832         // First thing is to locate the server name
2833         //
2834
2835         FsRtlDissectName( uniFullName,
2836                           &uniComponentName,
2837                           &uniRemainingPath);
2838
2839         uniFullName = uniRemainingPath;
2840
2841         //
2842         // This component is the server name we are serving
2843         //
2844
2845         if( RtlCompareUnicodeString( &uniComponentName,
2846                                      &AFSServerName,
2847                                      TRUE) != 0)
2848         {
2849
2850             //
2851             // Drive letter based name?
2852             //
2853
2854             uniFullName = pIrpSp->FileObject->FileName;
2855
2856             while( usIndex < uniFullName.Length/sizeof( WCHAR))
2857             {
2858
2859                 if( uniFullName.Buffer[ usIndex] == L':')
2860                 {
2861
2862                     uniFullName.Buffer = &uniFullName.Buffer[ usIndex + 2];
2863
2864                     uniFullName.Length -= (usIndex + 2) * sizeof( WCHAR);
2865
2866                     usDriveIndex = usIndex - 1;
2867
2868                     break;
2869                 }
2870
2871                 usIndex++;
2872             }
2873
2874             //
2875             // Do we have the right server name now?
2876             //
2877
2878             FsRtlDissectName( uniFullName,
2879                               &uniComponentName,
2880                               &uniRemainingPath);
2881
2882             uniFullName = uniRemainingPath;
2883
2884             //
2885             // This component is the server name we are serving
2886             //
2887
2888             if( RtlCompareUnicodeString( &uniComponentName,
2889                                          &AFSServerName,
2890                                          TRUE) != 0)
2891             {
2892
2893                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2894                               AFS_TRACE_LEVEL_ERROR,
2895                               "AFSParseName (%08lX) Name %wZ does not have server name\n",
2896                               Irp,
2897                               &pIrpSp->FileObject->FileName);
2898
2899                 try_return( ntStatus = STATUS_BAD_NETWORK_NAME);
2900             }
2901
2902             //
2903             // Validate this drive letter is actively mapped
2904             //
2905
2906             if( usDriveIndex > 0 &&
2907                 !AFSIsDriveMapped( pIrpSp->FileObject->FileName.Buffer[ usDriveIndex]))
2908             {
2909
2910                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2911                               AFS_TRACE_LEVEL_ERROR,
2912                               "AFSParseName (%08lX) Name %wZ contains invalid drive mapping\n",
2913                               Irp,
2914                               &pIrpSp->FileObject->FileName);
2915
2916                 try_return( ntStatus = STATUS_BAD_NETWORK_NAME);
2917             }
2918         }
2919
2920         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2921                       AFS_TRACE_LEVEL_VERBOSE_2,
2922                       "AFSParseName (%08lX) Processing full name %wZ\n",
2923                       Irp,
2924                       &uniFullName);
2925
2926         if( uniFullName.Length > 0 &&
2927             uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR)) - 1] == L'\\')
2928         {
2929
2930             uniFullName.Length -= sizeof( WCHAR);
2931         }
2932
2933         //
2934         // Be sure we are online and ready to go
2935         //
2936
2937         AFSAcquireExcl( AFSGlobalRoot->VolumeLock,
2938                         TRUE);
2939
2940         if( BooleanFlagOn( AFSGlobalRoot->ObjectInformation.Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID) ||
2941             BooleanFlagOn( AFSGlobalRoot->Flags, AFS_VOLUME_FLAGS_OFFLINE))
2942         {
2943
2944             //
2945             // The volume has been taken off line so fail the access
2946             //
2947
2948             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2949                           AFS_TRACE_LEVEL_ERROR,
2950                           "AFSParseName (%08lX) Volume %08lX:%08lX OFFLINE/INVALID\n",
2951                           Irp,
2952                           AFSGlobalRoot->ObjectInformation.FileId.Cell,
2953                           AFSGlobalRoot->ObjectInformation.FileId.Volume);
2954
2955             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
2956
2957             try_return( ntStatus = STATUS_DEVICE_NOT_READY);
2958         }
2959
2960         if( BooleanFlagOn( AFSGlobalRoot->ObjectInformation.Flags, AFS_OBJECT_FLAGS_VERIFY))
2961         {
2962
2963             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2964                           AFS_TRACE_LEVEL_VERBOSE,
2965                           "AFSParseName (%08lX) Verifying root of volume %08lX:%08lX\n",
2966                           Irp,
2967                           AFSGlobalRoot->ObjectInformation.FileId.Cell,
2968                           AFSGlobalRoot->ObjectInformation.FileId.Volume);
2969
2970             ntStatus = AFSVerifyVolume( (ULONGLONG)PsGetCurrentProcessId(),
2971                                         AFSGlobalRoot);
2972
2973             if( !NT_SUCCESS( ntStatus))
2974             {
2975
2976                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2977                               AFS_TRACE_LEVEL_ERROR,
2978                               "AFSParseName (%08lX) Failed verification of root Status %08lX\n",
2979                               Irp,
2980                               ntStatus);
2981
2982                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
2983
2984                 try_return( ntStatus);
2985             }
2986         }
2987
2988         if( !BooleanFlagOn( AFSGlobalRoot->ObjectInformation.Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
2989         {
2990
2991             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2992                           AFS_TRACE_LEVEL_VERBOSE,
2993                           "AFSParseName (%08lX) Enumerating global root of volume %08lX:%08lX\n",
2994                           Irp,
2995                           AFSGlobalRoot->ObjectInformation.FileId.Cell,
2996                           AFSGlobalRoot->ObjectInformation.FileId.Volume);
2997
2998             ntStatus = AFSEnumerateGlobalRoot( AuthGroup);
2999
3000             if( !NT_SUCCESS( ntStatus))
3001             {
3002
3003                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3004                               AFS_TRACE_LEVEL_ERROR,
3005                               "AFSParseName (%08lX) Failed enumeraiton of root Status %08lX\n",
3006                               Irp,
3007                               ntStatus);
3008
3009                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3010
3011                 try_return( ntStatus);
3012             }
3013         }
3014
3015         //
3016         // Check for the \\Server access and return it as though it where \\Server\Globalroot
3017         //
3018
3019         if( uniRemainingPath.Buffer == NULL ||
3020             ( uniRemainingPath.Length == sizeof( WCHAR) &&
3021               uniRemainingPath.Buffer[ 0] == L'\\'))
3022         {
3023
3024             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3025                           AFS_TRACE_LEVEL_VERBOSE_2,
3026                           "AFSParseName (%08lX) Returning global root access\n",
3027                           Irp);
3028
3029             InterlockedIncrement( &AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3030
3031             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3032                           AFS_TRACE_LEVEL_VERBOSE,
3033                           "AFSParseName Increment2 count on %wZ DE %p Ccb %p Cnt %d\n",
3034                           &AFSGlobalRoot->DirectoryCB->NameInformation.FileName,
3035                           AFSGlobalRoot->DirectoryCB,
3036                           NULL,
3037                           AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3038
3039             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3040
3041             *VolumeCB = NULL;
3042
3043             FileName->Length = 0;
3044             FileName->MaximumLength = 0;
3045             FileName->Buffer = NULL;
3046
3047             try_return( ntStatus = STATUS_SUCCESS);
3048         }
3049
3050         *RootFileName = uniFullName;
3051
3052         //
3053         // Include the starting \ in the root name
3054         //
3055
3056         if( RootFileName->Buffer[ 0] != L'\\')
3057         {
3058             RootFileName->Buffer--;
3059             RootFileName->Length += sizeof( WCHAR);
3060             RootFileName->MaximumLength += sizeof( WCHAR);
3061         }
3062
3063         //
3064         // Get the 'share' name
3065         //
3066
3067         FsRtlDissectName( uniFullName,
3068                           &uniComponentName,
3069                           &uniRemainingPath);
3070
3071         //
3072         // If this is the ALL access then perform some additional processing
3073         //
3074
3075         if( RtlCompareUnicodeString( &uniComponentName,
3076                                      &AFSGlobalRootName,
3077                                      TRUE) == 0)
3078         {
3079
3080             bIsAllShare = TRUE;
3081
3082             //
3083             // If there is nothing else then get out
3084             //
3085
3086             if( uniRemainingPath.Buffer == NULL ||
3087                 uniRemainingPath.Length == 0 ||
3088                 ( uniRemainingPath.Length == sizeof( WCHAR) &&
3089                   uniRemainingPath.Buffer[ 0] == L'\\'))
3090             {
3091
3092                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3093                               AFS_TRACE_LEVEL_VERBOSE_2,
3094                               "AFSParseName (%08lX) Returning global root access\n",
3095                               Irp);
3096
3097                 InterlockedIncrement( &AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3098
3099                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3100                               AFS_TRACE_LEVEL_VERBOSE,
3101                               "AFSParseName Increment3 count on %wZ DE %p Ccb %p Cnt %d\n",
3102                               &AFSGlobalRoot->DirectoryCB->NameInformation.FileName,
3103                               AFSGlobalRoot->DirectoryCB,
3104                               NULL,
3105                               AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3106
3107                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3108
3109                 *VolumeCB = NULL;
3110
3111                 FileName->Length = 0;
3112                 FileName->MaximumLength = 0;
3113                 FileName->Buffer = NULL;
3114
3115                 try_return( ntStatus = STATUS_SUCCESS);
3116             }
3117
3118             //
3119             // Process the name again to strip off the ALL portion
3120             //
3121
3122             uniFullName = uniRemainingPath;
3123
3124             FsRtlDissectName( uniFullName,
3125                               &uniComponentName,
3126                               &uniRemainingPath);
3127
3128             //
3129             // Check for the PIOCtl name
3130             //
3131
3132             if( RtlCompareUnicodeString( &uniComponentName,
3133                                          &AFSPIOCtlName,
3134                                          TRUE) == 0)
3135             {
3136
3137                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3138                               AFS_TRACE_LEVEL_VERBOSE_2,
3139                               "AFSParseName (%08lX) Returning root PIOCtl access\n",
3140                               Irp);
3141
3142                 InterlockedIncrement( &AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3143
3144                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3145                               AFS_TRACE_LEVEL_VERBOSE,
3146                               "AFSParseName Increment4 count on %wZ DE %p Ccb %p Cnt %d\n",
3147                               &AFSGlobalRoot->DirectoryCB->NameInformation.FileName,
3148                               AFSGlobalRoot->DirectoryCB,
3149                               NULL,
3150                               AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3151
3152                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3153
3154                 ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3155
3156                 *VolumeCB = NULL;
3157
3158                 *FileName = AFSPIOCtlName;
3159
3160                 try_return( ntStatus = STATUS_SUCCESS);
3161             }
3162         }
3163         else if( (pDirEntry = AFSGetSpecialShareNameEntry( &uniComponentName,
3164                                                            &uniRemainingPath)) != NULL)
3165         {
3166
3167             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3168                           AFS_TRACE_LEVEL_VERBOSE_2,
3169                           "AFSParseName (%08lX) Returning root share name %wZ access\n",
3170                           Irp,
3171                           &uniComponentName);
3172
3173             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3174
3175             //
3176             // Add in the full share name to pass back
3177             //
3178
3179             if( uniRemainingPath.Buffer != NULL)
3180             {
3181
3182                 //
3183                 // This routine strips off the leading slash so add it back in
3184                 //
3185
3186                 uniRemainingPath.Buffer--;
3187                 uniRemainingPath.Length += sizeof( WCHAR);
3188                 uniRemainingPath.MaximumLength += sizeof( WCHAR);
3189
3190                 //
3191                 // And the cell name
3192                 //
3193
3194                 uniRemainingPath.Buffer -= (uniComponentName.Length/sizeof( WCHAR));
3195                 uniRemainingPath.Length += uniComponentName.Length;
3196                 uniRemainingPath.MaximumLength += uniComponentName.Length;
3197
3198                 uniComponentName = uniRemainingPath;
3199             }
3200
3201             *VolumeCB = NULL;
3202
3203             *FileName = uniComponentName;
3204
3205             *ParentDirectoryCB = pDirEntry;
3206
3207             ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3208
3209             InterlockedIncrement( &pDirEntry->OpenReferenceCount);
3210
3211             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3212                           AFS_TRACE_LEVEL_VERBOSE,
3213                           "AFSParseName Increment5 count on %wZ DE %p Ccb %p Cnt %d\n",
3214                           &pDirEntry->NameInformation.FileName,
3215                           pDirEntry,
3216                           NULL,
3217                           pDirEntry->OpenReferenceCount);
3218
3219             try_return( ntStatus = STATUS_SUCCESS);
3220         }
3221
3222         //
3223         // Determine the 'share' we are accessing
3224         //
3225
3226         ulCRC = AFSGenerateCRC( &uniComponentName,
3227                                 FALSE);
3228
3229         AFSAcquireShared( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock,
3230                           TRUE);
3231
3232         bReleaseTreeLock = TRUE;
3233
3234         AFSLocateCaseSensitiveDirEntry( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
3235                                         ulCRC,
3236                                         &pDirEntry);
3237
3238         if( pDirEntry == NULL)
3239         {
3240
3241             ulCRC = AFSGenerateCRC( &uniComponentName,
3242                                     TRUE);
3243
3244             AFSLocateCaseInsensitiveDirEntry( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
3245                                               ulCRC,
3246                                               &pDirEntry);
3247
3248             if( pDirEntry == NULL)
3249             {
3250
3251                 //
3252                 // OK, if this component is a valid short name then try
3253                 // a lookup in the short name tree
3254                 //
3255
3256                 if( RtlIsNameLegalDOS8Dot3( &uniComponentName,
3257                                             NULL,
3258                                             NULL))
3259                 {
3260
3261                     AFSLocateShortNameDirEntry( AFSGlobalRoot->ObjectInformation.Specific.Directory.ShortNameTree,
3262                                                 ulCRC,
3263                                                 &pDirEntry);
3264                 }
3265
3266                 if( pDirEntry == NULL)
3267                 {
3268
3269                     //
3270                     // Check with the service whether it is a valid cell name
3271                     //
3272
3273                     AFSReleaseResource( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock);
3274
3275                     bReleaseTreeLock = FALSE;
3276
3277                     ntStatus = AFSCheckCellName( AuthGroup,
3278                                                  &uniComponentName,
3279                                                  &pDirEntry);
3280
3281                     if( !NT_SUCCESS( ntStatus))
3282                     {
3283                         AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3284
3285                         if ( bIsAllShare &&
3286                              uniRemainingPath.Length == 0 &&
3287                              ntStatus == STATUS_OBJECT_PATH_NOT_FOUND)
3288                         {
3289
3290                             ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
3291                         }
3292
3293                         try_return( ntStatus);
3294                     }
3295                 }
3296             }
3297         }
3298
3299         if( bReleaseTreeLock)
3300         {
3301             AFSReleaseResource( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock);
3302         }
3303
3304         //
3305         // Be sure we are starting from the correct volume
3306         //
3307
3308         if( pDirEntry->ObjectInformation->VolumeCB != AFSGlobalRoot)
3309         {
3310
3311             //
3312             // We dropped the global root in the CheckCellName routine which is the
3313             // only way we can be here
3314             //
3315
3316             pVolumeCB = pDirEntry->ObjectInformation->VolumeCB;
3317
3318             //
3319             // In this case don't add back in the 'share' name since that is where we are
3320             // starting. Just put the leading slash back in
3321             //
3322
3323             if( uniRemainingPath.Buffer != NULL)
3324             {
3325
3326                 uniRemainingPath.Buffer--;
3327                 uniRemainingPath.Length += sizeof( WCHAR);
3328                 uniRemainingPath.MaximumLength += sizeof( WCHAR);
3329
3330                 if( uniRemainingPath.Length > sizeof( WCHAR))
3331                 {
3332
3333                     ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3334                 }
3335
3336                 //
3337                 // Pass back the parent being the root of the volume
3338                 //
3339
3340                 *ParentDirectoryCB = pVolumeCB->DirectoryCB;
3341             }
3342             else
3343             {
3344
3345                 //
3346                 // Pass back a root slash
3347                 //
3348
3349                 uniRemainingPath = uniComponentName;
3350
3351                 uniRemainingPath.Buffer--;
3352                 uniRemainingPath.Length = sizeof( WCHAR);
3353                 uniRemainingPath.MaximumLength = sizeof( WCHAR);
3354
3355                 //
3356                 // This is a root open so pass back no parent
3357                 //
3358
3359                 *ParentDirectoryCB = NULL;
3360             }
3361         }
3362         else
3363         {
3364
3365             pVolumeCB = AFSGlobalRoot;
3366
3367             //
3368             // Add back in the 'share' portion of the name since we will parse it out on return
3369             //
3370
3371             if( uniRemainingPath.Buffer != NULL)
3372             {
3373
3374                 //
3375                 // This routine strips off the leading slash so add it back in
3376                 //
3377
3378                 uniRemainingPath.Buffer--;
3379                 uniRemainingPath.Length += sizeof( WCHAR);
3380                 uniRemainingPath.MaximumLength += sizeof( WCHAR);
3381
3382                 if( uniRemainingPath.Length > sizeof( WCHAR))
3383                 {
3384
3385                     ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3386                 }
3387
3388                 //
3389                 // And the cell name
3390                 //
3391
3392                 uniRemainingPath.Buffer -= (uniComponentName.Length/sizeof( WCHAR));
3393                 uniRemainingPath.Length += uniComponentName.Length;
3394                 uniRemainingPath.MaximumLength += uniComponentName.Length;
3395             }
3396             else
3397             {
3398
3399                 uniRemainingPath = uniComponentName;
3400             }
3401
3402             //
3403             // And the leading slash again ...
3404             //
3405
3406             uniRemainingPath.Buffer--;
3407             uniRemainingPath.Length += sizeof( WCHAR);
3408             uniRemainingPath.MaximumLength += sizeof( WCHAR);
3409
3410             InterlockedIncrement( &pVolumeCB->DirectoryCB->OpenReferenceCount);
3411
3412             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3413                           AFS_TRACE_LEVEL_VERBOSE,
3414                           "AFSParseName Increment6 count on %wZ DE %p Ccb %p Cnt %d\n",
3415                           &pVolumeCB->DirectoryCB->NameInformation.FileName,
3416                           pVolumeCB->DirectoryCB,
3417                           NULL,
3418                           pVolumeCB->DirectoryCB->OpenReferenceCount);
3419
3420             //
3421             // Pass back the parent being the volume root
3422             //
3423
3424             *ParentDirectoryCB = pVolumeCB->DirectoryCB;
3425         }
3426
3427         //
3428         // We only need the volume shared at this point
3429         //
3430
3431         AFSConvertToShared( pVolumeCB->VolumeLock);
3432
3433         //
3434         // Init our name array
3435         //
3436
3437         pNameArray = AFSInitNameArray( pVolumeCB->DirectoryCB,
3438                                        0);
3439
3440         if( pNameArray == NULL)
3441         {
3442
3443             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3444                           AFS_TRACE_LEVEL_VERBOSE,
3445                           "AFSParseName (%08lX) Failed to initialize name array\n",
3446                           Irp);
3447
3448             AFSReleaseResource( pVolumeCB->VolumeLock);
3449
3450             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
3451         }
3452
3453         //
3454         // Return the remaining portion as the file name
3455         //
3456
3457         *FileName = uniRemainingPath;
3458
3459         *ParsedFileName = uniRemainingPath;
3460
3461         *NameArray = pNameArray;
3462
3463         *VolumeCB = pVolumeCB;
3464
3465         //
3466         // Increment our reference on the volume
3467         //
3468
3469         InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
3470
3471         AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
3472                       AFS_TRACE_LEVEL_VERBOSE,
3473                       "AFSParseName Increment2 count on global volume %08lX Cnt %d\n",
3474                       pVolumeCB,
3475                       pVolumeCB->VolumeReferenceCount);
3476
3477 try_exit:
3478
3479         if( NT_SUCCESS( ntStatus))
3480         {
3481
3482             if( *ParentDirectoryCB != NULL)
3483             {
3484
3485                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3486                               AFS_TRACE_LEVEL_VERBOSE,
3487                               "AFSParseName Count on %wZ DE %p Ccb %p Cnt %d\n",
3488                               &(*ParentDirectoryCB)->NameInformation.FileName,
3489                               *ParentDirectoryCB,
3490                               NULL,
3491                               (*ParentDirectoryCB)->OpenReferenceCount);
3492             }
3493         }
3494
3495         if( *VolumeCB != NULL)
3496         {
3497
3498             ASSERT( (*VolumeCB)->VolumeReferenceCount > 1);
3499         }
3500
3501         if( ntStatus != STATUS_SUCCESS)
3502         {
3503
3504             if( pNameArray != NULL)
3505             {
3506
3507                 AFSFreeNameArray( pNameArray);
3508             }
3509         }
3510     }
3511
3512     return ntStatus;
3513 }
3514
3515 NTSTATUS
3516 AFSCheckCellName( IN GUID *AuthGroup,
3517                   IN UNICODE_STRING *CellName,
3518                   OUT AFSDirectoryCB **ShareDirEntry)
3519 {
3520
3521     NTSTATUS ntStatus = STATUS_SUCCESS;
3522     UNICODE_STRING uniName;
3523     AFSFileID stFileID;
3524     AFSDirEnumEntry *pDirEnumEntry = NULL;
3525     AFSDeviceExt *pDevExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
3526     AFSDirHdr *pDirHdr = &AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr;
3527     AFSDirectoryCB *pDirNode = NULL;
3528     UNICODE_STRING uniDirName, uniTargetName;
3529     AFSVolumeCB *pVolumeCB = NULL;
3530
3531     __Enter
3532     {
3533
3534         //
3535         // Look for some default names we will not handle
3536         //
3537
3538         RtlInitUnicodeString( &uniName,
3539                               L"IPC$");
3540
3541         if( RtlCompareUnicodeString( &uniName,
3542                                      CellName,
3543                                      TRUE) == 0)
3544         {
3545
3546             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3547         }
3548
3549         RtlInitUnicodeString( &uniName,
3550                               L"wkssvc");
3551
3552         if( RtlCompareUnicodeString( &uniName,
3553                                      CellName,
3554                                      TRUE) == 0)
3555         {
3556
3557             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3558         }
3559
3560         RtlInitUnicodeString( &uniName,
3561                               L"srvsvc");
3562
3563         if( RtlCompareUnicodeString( &uniName,
3564                                      CellName,
3565                                      TRUE) == 0)
3566         {
3567
3568             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3569         }
3570
3571         RtlInitUnicodeString( &uniName,
3572                               L"PIPE");
3573
3574         if( RtlCompareUnicodeString( &uniName,
3575                                      CellName,
3576                                      TRUE) == 0)
3577         {
3578
3579             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3580         }
3581
3582         //
3583         // OK, ask the CM about this component name
3584         //
3585
3586         stFileID = AFSGlobalRoot->ObjectInformation.FileId;
3587
3588         ntStatus = AFSEvaluateTargetByName( AuthGroup,
3589                                             &stFileID,
3590                                             CellName,
3591                                             &pDirEnumEntry);
3592
3593         if( !NT_SUCCESS( ntStatus))
3594         {
3595
3596             try_return( ntStatus);
3597         }
3598
3599         //
3600         // OK, we have a dir enum entry back so add it to the root node
3601         //
3602
3603         uniDirName = *CellName;
3604
3605         uniTargetName.Length = (USHORT)pDirEnumEntry->TargetNameLength;
3606         uniTargetName.MaximumLength = uniTargetName.Length;
3607         uniTargetName.Buffer = (WCHAR *)((char *)pDirEnumEntry + pDirEnumEntry->TargetNameOffset);
3608
3609         //
3610         // Is this entry a root volume entry?
3611         //
3612
3613         if( pDirEnumEntry->FileId.Cell != AFSGlobalRoot->ObjectInformation.FileId.Cell ||
3614             pDirEnumEntry->FileId.Volume != AFSGlobalRoot->ObjectInformation.FileId.Volume)
3615         {
3616
3617             //
3618             // We have the global root on entry so drop it now
3619             //
3620
3621             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3622
3623             //
3624             // Build the root volume entry
3625             //
3626
3627             ntStatus = AFSBuildRootVolume( AuthGroup,
3628                                            &pDirEnumEntry->FileId,
3629                                            &pVolumeCB);
3630
3631             if( !NT_SUCCESS( ntStatus))
3632             {
3633
3634                 //
3635                 // On failure this routine is expecting to hold the global root
3636                 //
3637
3638                 AFSAcquireShared( AFSGlobalRoot->VolumeLock,
3639                                   TRUE);
3640
3641                 try_return( ntStatus);
3642             }
3643
3644             *ShareDirEntry = pVolumeCB->DirectoryCB;
3645
3646             InterlockedIncrement( &pVolumeCB->DirectoryCB->OpenReferenceCount);
3647
3648             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3649                           AFS_TRACE_LEVEL_VERBOSE,
3650                           "AFSCheckCellName Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
3651                           &pVolumeCB->DirectoryCB->NameInformation.FileName,
3652                           pVolumeCB->DirectoryCB,
3653                           NULL,
3654                           pVolumeCB->DirectoryCB->OpenReferenceCount);
3655
3656             InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
3657         }
3658         else
3659         {
3660
3661             pDirNode = AFSInitDirEntry( &AFSGlobalRoot->ObjectInformation,
3662                                         &uniDirName,
3663                                         &uniTargetName,
3664                                         pDirEnumEntry,
3665                                         (ULONG)InterlockedIncrement( &pDirHdr->ContentIndex));
3666
3667             if( pDirNode == NULL)
3668             {
3669
3670                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
3671             }
3672
3673             //
3674             // Init the short name if we have one
3675             //
3676
3677             if( pDirEnumEntry->ShortNameLength > 0)
3678             {
3679
3680                 pDirNode->NameInformation.ShortNameLength = pDirEnumEntry->ShortNameLength;
3681
3682                 RtlCopyMemory( pDirNode->NameInformation.ShortName,
3683                                pDirEnumEntry->ShortName,
3684                                pDirNode->NameInformation.ShortNameLength);
3685             }
3686
3687             AFSAcquireExcl( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock,
3688                             TRUE);
3689
3690             //
3691             // Insert the node into the name tree
3692             //
3693
3694             ASSERT( ExIsResourceAcquiredExclusiveLite( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock));
3695
3696             if( pDirHdr->CaseSensitiveTreeHead == NULL)
3697             {
3698
3699                 pDirHdr->CaseSensitiveTreeHead = pDirNode;
3700             }
3701             else
3702             {
3703
3704                 AFSInsertCaseSensitiveDirEntry( pDirHdr->CaseSensitiveTreeHead,
3705                                                 pDirNode);
3706             }
3707
3708             if( pDirHdr->CaseInsensitiveTreeHead == NULL)
3709             {
3710
3711                 pDirHdr->CaseInsensitiveTreeHead = pDirNode;
3712
3713                 SetFlag( pDirNode->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD);
3714             }
3715             else
3716             {
3717
3718                 AFSInsertCaseInsensitiveDirEntry( pDirHdr->CaseInsensitiveTreeHead,
3719                                                   pDirNode);
3720             }
3721
3722             if( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListHead == NULL)
3723             {
3724
3725                 AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListHead = pDirNode;
3726             }
3727             else
3728             {
3729
3730                 AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListTail->ListEntry.fLink = pDirNode;
3731
3732                 pDirNode->ListEntry.bLink = AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListTail;
3733             }
3734
3735             AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListTail = pDirNode;
3736
3737             SetFlag( pDirNode->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
3738
3739             InterlockedIncrement( &AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeCount);
3740
3741             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
3742                           AFS_TRACE_LEVEL_VERBOSE,
3743                           "AFSCheckCellName Adding entry %wZ Inc Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
3744                               &pDirNode->NameInformation.FileName,
3745                               AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeCount,
3746                               AFSGlobalRoot->ObjectInformation.FileId.Cell,
3747                               AFSGlobalRoot->ObjectInformation.FileId.Volume,
3748                               AFSGlobalRoot->ObjectInformation.FileId.Vnode,
3749                               AFSGlobalRoot->ObjectInformation.FileId.Unique);
3750
3751             InterlockedIncrement( &pDirNode->OpenReferenceCount);
3752
3753             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3754                           AFS_TRACE_LEVEL_VERBOSE,
3755                           "AFSCheckCellName Increment2 count on %wZ DE %p Ccb %p Cnt %d\n",
3756                           &pDirNode->NameInformation.FileName,
3757                           pDirNode,
3758                           NULL,
3759                           pDirNode->OpenReferenceCount);
3760
3761             AFSReleaseResource( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock);
3762
3763             //
3764             // Pass back the dir node
3765             //
3766
3767             *ShareDirEntry = pDirNode;
3768         }
3769
3770 try_exit:
3771
3772         if( pDirEnumEntry != NULL)
3773         {
3774
3775             AFSExFreePool( pDirEnumEntry);
3776         }
3777     }
3778
3779     return ntStatus;
3780 }
3781
3782 NTSTATUS
3783 AFSBuildMountPointTarget( IN GUID *AuthGroup,
3784                           IN AFSDirectoryCB  *DirectoryCB,
3785                           OUT AFSVolumeCB **TargetVolumeCB)
3786 {
3787
3788     NTSTATUS ntStatus = STATUS_SUCCESS;
3789     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
3790     AFSDirEnumEntry *pDirEntry = NULL;
3791     AFSDirectoryCB *pDirNode = NULL;
3792     UNICODE_STRING uniDirName, uniTargetName;
3793     ULONGLONG       ullIndex = 0;
3794     AFSVolumeCB *pVolumeCB = NULL;
3795     AFSFileID stTargetFileID;
3796
3797     __Enter
3798     {
3799
3800         //
3801         // Loop on each entry, building the chain until we encounter the final target
3802         //
3803
3804         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3805                       AFS_TRACE_LEVEL_VERBOSE_2,
3806                       "AFSBuildMountPointTarget Building target directory for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
3807                       &DirectoryCB->NameInformation.FileName,
3808                       DirectoryCB->ObjectInformation->FileId.Cell,
3809                       DirectoryCB->ObjectInformation->FileId.Volume,
3810                       DirectoryCB->ObjectInformation->FileId.Vnode,
3811                       DirectoryCB->ObjectInformation->FileId.Unique);
3812
3813         //
3814         // Do we need to evaluate the node?
3815         //
3816
3817         //if( DirectoryCB->ObjectInformation->TargetFileId.Vnode == 0 &&
3818         //    DirectoryCB->ObjectInformation->TargetFileId.Unique == 0)
3819         {
3820
3821             //
3822             // Go evaluate the current target to get the target fid
3823             //
3824
3825             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3826                           AFS_TRACE_LEVEL_VERBOSE_2,
3827                           "AFSBuildMountPointTarget Evaluating target %wZ FID %08lX-%08lX-%08lX-%08lX\n",
3828                               &DirectoryCB->NameInformation.FileName,
3829                               DirectoryCB->ObjectInformation->FileId.Cell,
3830                               DirectoryCB->ObjectInformation->FileId.Volume,
3831                               DirectoryCB->ObjectInformation->FileId.Vnode,
3832                               DirectoryCB->ObjectInformation->FileId.Unique);
3833
3834             ntStatus = AFSEvaluateTargetByID( DirectoryCB->ObjectInformation,
3835                                               AuthGroup,
3836                                               FALSE,
3837                                               &pDirEntry);
3838
3839             if( !NT_SUCCESS( ntStatus))
3840             {
3841
3842                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3843                               AFS_TRACE_LEVEL_ERROR,
3844                               "AFSBuildMountPointTarget Failed to evaluate target %wZ Status %08lX\n",
3845                               &DirectoryCB->NameInformation.FileName,
3846                               ntStatus);
3847                 try_return( ntStatus);
3848             }
3849
3850             if( pDirEntry->TargetFileId.Vnode == 0 &&
3851                 pDirEntry->TargetFileId.Unique == 0)
3852             {
3853
3854                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3855                               AFS_TRACE_LEVEL_ERROR,
3856                               "AFSBuildMountPointTarget Target %wZ FID %08lX-%08lX-%08lX-%08lX service returned zero FID\n",
3857                               &DirectoryCB->NameInformation.FileName,
3858                               DirectoryCB->ObjectInformation->FileId.Cell,
3859                               DirectoryCB->ObjectInformation->FileId.Volume,
3860                               DirectoryCB->ObjectInformation->FileId.Vnode,
3861                               DirectoryCB->ObjectInformation->FileId.Unique);
3862
3863                 try_return( ntStatus = STATUS_ACCESS_DENIED);
3864             }
3865
3866             AFSAcquireExcl( &DirectoryCB->NonPaged->Lock,
3867                             TRUE);
3868
3869             ntStatus = AFSUpdateTargetName( &DirectoryCB->NameInformation.TargetName,
3870                                             &DirectoryCB->Flags,
3871                                             (WCHAR *)((char *)pDirEntry + pDirEntry->TargetNameOffset),
3872                                             (USHORT)pDirEntry->TargetNameLength);
3873
3874             if( !NT_SUCCESS( ntStatus))
3875             {
3876
3877                 AFSReleaseResource( &DirectoryCB->NonPaged->Lock);
3878
3879                 try_return( ntStatus);
3880             }
3881
3882             AFSReleaseResource( &DirectoryCB->NonPaged->Lock);
3883
3884             DirectoryCB->ObjectInformation->TargetFileId = pDirEntry->TargetFileId;
3885         }
3886
3887         stTargetFileID = DirectoryCB->ObjectInformation->TargetFileId;
3888
3889         //
3890         // Try to locate this FID. First the volume then the
3891         // entry itself
3892         //
3893
3894         ullIndex = AFSCreateHighIndex( &stTargetFileID);
3895
3896         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
3897                       AFS_TRACE_LEVEL_VERBOSE,
3898                       "AFSBuildMountPointTarget Acquiring RDR VolumeTreeLock lock %08lX EXCL %08lX\n",
3899                       &pDevExt->Specific.RDR.VolumeTreeLock,
3900                       PsGetCurrentThread());
3901
3902         AFSAcquireShared( &pDevExt->Specific.RDR.VolumeTreeLock,
3903                           TRUE);
3904
3905         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3906                       AFS_TRACE_LEVEL_VERBOSE_2,
3907                       "AFSBuildMountPointTarget Locating volume for target %I64X\n",
3908                       ullIndex);
3909
3910         ntStatus = AFSLocateHashEntry( pDevExt->Specific.RDR.VolumeTree.TreeHead,
3911                                        ullIndex,
3912                                        (AFSBTreeEntry **)&pVolumeCB);
3913
3914         //
3915         // We can be processing a request for a target that is on a volume
3916         // we have never seen before.
3917         //
3918
3919         if( pVolumeCB == NULL)
3920         {
3921
3922             //
3923             // Locking is held correctly in init routine
3924             //
3925
3926             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
3927
3928             //
3929             // Go init the root of the volume
3930             //
3931
3932             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3933                           AFS_TRACE_LEVEL_VERBOSE_2,
3934                           "AFSBuildMountPointTarget Initializing root for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
3935                           &DirectoryCB->NameInformation.FileName,
3936                           DirectoryCB->ObjectInformation->FileId.Cell,
3937                           DirectoryCB->ObjectInformation->FileId.Volume,
3938                           DirectoryCB->ObjectInformation->FileId.Vnode,
3939                           DirectoryCB->ObjectInformation->FileId.Unique);
3940
3941             ntStatus = AFSInitVolume( AuthGroup,
3942                                       &stTargetFileID,
3943                                       &pVolumeCB);
3944
3945             if( !NT_SUCCESS( ntStatus))
3946             {
3947
3948                 try_return( ntStatus);
3949             }
3950         }
3951         else
3952         {
3953
3954             //
3955             // Check if this volume has been deleted or taken offline
3956             //
3957
3958             if( BooleanFlagOn( pVolumeCB->Flags, AFS_VOLUME_FLAGS_OFFLINE))
3959             {
3960
3961                 AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
3962
3963                 try_return( ntStatus = STATUS_FILE_IS_OFFLINE);
3964             }
3965
3966             //
3967             // Just to ensure that things don't get torn down AND we don't create a
3968             // deadlock with invalidation
3969             //
3970
3971             InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
3972
3973             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
3974
3975             AFSAcquireExcl( pVolumeCB->VolumeLock,
3976                             TRUE);
3977
3978             InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
3979         }
3980
3981         if( pVolumeCB->RootFcb == NULL)
3982         {
3983
3984             //
3985             // Initialize the root fcb for this volume
3986             //
3987
3988             ntStatus = AFSInitRootFcb( (ULONGLONG)PsGetCurrentProcessId(),
3989                                        pVolumeCB);
3990
3991             if( !NT_SUCCESS( ntStatus))
3992             {
3993
3994                 AFSReleaseResource( pVolumeCB->VolumeLock);
3995
3996                 try_return( ntStatus);
3997             }
3998
3999             //
4000             // Drop the lock acquired above
4001             //
4002
4003             AFSReleaseResource( &pVolumeCB->RootFcb->NPFcb->Resource);
4004         }
4005
4006         AFSConvertToShared( pVolumeCB->VolumeLock);
4007
4008         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4009                       AFS_TRACE_LEVEL_VERBOSE_2,
4010                       "AFSBuildMountPointTarget Evaluated target of %wZ FID %08lX-%08lX-%08lX-%08lX as root volume\n",
4011                       &pVolumeCB->DirectoryCB->NameInformation.FileName,
4012                       pVolumeCB->ObjectInformation.FileId.Cell,
4013                       pVolumeCB->ObjectInformation.FileId.Volume,
4014                       pVolumeCB->ObjectInformation.FileId.Vnode,
4015                       pVolumeCB->ObjectInformation.FileId.Unique);
4016
4017         InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
4018
4019         AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
4020                       AFS_TRACE_LEVEL_VERBOSE,
4021                       "AFSBuildMountPointTarget Increment count on volume %08lX Cnt %d\n",
4022                       pVolumeCB,
4023                       pVolumeCB->VolumeReferenceCount);
4024
4025         *TargetVolumeCB = pVolumeCB;
4026
4027 try_exit:
4028
4029         if( pDirEntry)
4030         {
4031
4032             AFSExFreePool( pDirEntry);
4033         }
4034     }
4035
4036     return ntStatus;
4037 }
4038
4039 NTSTATUS
4040 AFSBuildRootVolume( IN GUID *AuthGroup,
4041                     IN AFSFileID *FileId,
4042                     OUT AFSVolumeCB **TargetVolumeCB)
4043 {
4044
4045     NTSTATUS ntStatus = STATUS_SUCCESS;
4046     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
4047     AFSDirectoryCB *pDirNode = NULL;
4048     UNICODE_STRING uniDirName, uniTargetName;
4049     ULONGLONG       ullIndex = 0;
4050     AFSVolumeCB *pVolumeCB = NULL;
4051
4052     __Enter
4053     {
4054
4055         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4056                       AFS_TRACE_LEVEL_VERBOSE_2,
4057                       "AFSBuildRootVolume Building target volume for FID %08lX-%08lX-%08lX-%08lX\n",
4058                       FileId->Cell,
4059                       FileId->Volume,
4060                       FileId->Vnode,
4061                       FileId->Unique);
4062
4063         ullIndex = AFSCreateHighIndex( FileId);
4064
4065         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
4066                       AFS_TRACE_LEVEL_VERBOSE,
4067                       "AFSBuildRootVolume Acquiring RDR VolumeTreeLock lock %08lX EXCL %08lX\n",
4068                       &pDevExt->Specific.RDR.VolumeTreeLock,
4069                       PsGetCurrentThread());
4070
4071         AFSAcquireShared( &pDevExt->Specific.RDR.VolumeTreeLock,
4072                           TRUE);
4073
4074         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4075                       AFS_TRACE_LEVEL_VERBOSE_2,
4076                       "AFSBuildRootVolume Locating volume for target %I64X\n",
4077                       ullIndex);
4078
4079         ntStatus = AFSLocateHashEntry( pDevExt->Specific.RDR.VolumeTree.TreeHead,
4080                                        ullIndex,
4081                                        (AFSBTreeEntry **)&pVolumeCB);
4082
4083         //
4084         // We can be processing a request for a target that is on a volume
4085         // we have never seen before.
4086         //
4087
4088         if( pVolumeCB == NULL)
4089         {
4090
4091             //
4092             // Locking is held correctly in init routine
4093             //
4094
4095             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
4096
4097             //
4098             // Go init the root of the volume
4099             //
4100
4101             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4102                           AFS_TRACE_LEVEL_VERBOSE_2,
4103                           "AFSBuildRootVolume Initializing root for FID %08lX-%08lX-%08lX-%08lX\n",
4104                           FileId->Cell,
4105                           FileId->Volume,
4106                           FileId->Vnode,
4107                           FileId->Unique);
4108
4109             ntStatus = AFSInitVolume( AuthGroup,
4110                                       FileId,
4111                                       &pVolumeCB);
4112
4113             if( !NT_SUCCESS( ntStatus))
4114             {
4115
4116                 try_return( ntStatus);
4117             }
4118         }
4119         else
4120         {
4121
4122             //
4123             // Just to ensure that things don't get torn down AND we don't create a
4124             // deadlock with invalidation
4125             //
4126
4127             InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
4128
4129             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
4130
4131             AFSAcquireExcl( pVolumeCB->VolumeLock,
4132                             TRUE);
4133
4134             InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
4135         }
4136
4137
4138         if( pVolumeCB->RootFcb == NULL)
4139         {
4140
4141             //
4142             // Initialize the root fcb for this volume
4143             //
4144
4145             ntStatus = AFSInitRootFcb( (ULONGLONG)PsGetCurrentProcessId(),
4146                                        pVolumeCB);
4147
4148             if( !NT_SUCCESS( ntStatus))
4149             {
4150
4151                 AFSReleaseResource( pVolumeCB->VolumeLock);
4152
4153                 try_return( ntStatus);
4154             }
4155
4156             //
4157             // Drop the lock acquired above
4158             //
4159
4160             AFSReleaseResource( &pVolumeCB->RootFcb->NPFcb->Resource);
4161         }
4162
4163         AFSConvertToShared( pVolumeCB->VolumeLock);
4164
4165         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4166                       AFS_TRACE_LEVEL_VERBOSE_2,
4167                       "AFSBuildRootVolume Evaluated target of %wZ FID %08lX-%08lX-%08lX-%08lX as root volume\n",
4168                       &pVolumeCB->DirectoryCB->NameInformation.FileName,
4169                       pVolumeCB->ObjectInformation.FileId.Cell,
4170                       pVolumeCB->ObjectInformation.FileId.Volume,
4171                       pVolumeCB->ObjectInformation.FileId.Vnode,
4172                       pVolumeCB->ObjectInformation.FileId.Unique);
4173
4174         InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
4175
4176         AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
4177                       AFS_TRACE_LEVEL_VERBOSE,
4178                       "AFSBuildRootVolume Increment count on volume %08lX Cnt %d\n",
4179                       pVolumeCB,
4180                       pVolumeCB->VolumeReferenceCount);
4181
4182         *TargetVolumeCB = pVolumeCB;
4183
4184 try_exit:
4185
4186         NOTHING;
4187     }
4188
4189     return ntStatus;
4190 }
4191
4192 NTSTATUS
4193 AFSProcessDFSLink( IN AFSDirectoryCB *DirEntry,
4194                    IN PFILE_OBJECT FileObject,
4195                    IN UNICODE_STRING *RemainingPath)
4196 {
4197
4198     NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
4199     UNICODE_STRING uniReparseName;
4200     UNICODE_STRING uniMUPDeviceName;
4201     AFSDirEnumEntry *pDirEntry = NULL;
4202     GUID *pAuthGroup = NULL;
4203
4204     __Enter
4205     {
4206
4207         //
4208         // Build up the name to reparse
4209         //
4210
4211         RtlInitUnicodeString( &uniMUPDeviceName,
4212                               L"\\Device\\MUP");
4213
4214         uniReparseName.Length = 0;
4215         uniReparseName.Buffer = NULL;
4216
4217         //
4218         // Be sure we have a target name
4219         //
4220
4221         if( DirEntry->NameInformation.TargetName.Length == 0)
4222         {
4223
4224             if( DirEntry->ObjectInformation->Fcb != NULL)
4225             {
4226                 pAuthGroup = &DirEntry->ObjectInformation->Fcb->AuthGroup;
4227             }
4228
4229             ntStatus = AFSEvaluateTargetByID( DirEntry->ObjectInformation,
4230                                               pAuthGroup,
4231                                               FALSE,
4232                                               &pDirEntry);
4233
4234             if( !NT_SUCCESS( ntStatus) ||
4235                 pDirEntry->TargetNameLength == 0)
4236             {
4237
4238                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4239                               AFS_TRACE_LEVEL_ERROR,
4240                               "AFSProcessDFSLink EvaluateTargetByID failed for Fcb %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
4241                               &DirEntry->NameInformation.FileName,
4242                               DirEntry->ObjectInformation->FileId.Cell,
4243                               DirEntry->ObjectInformation->FileId.Volume,
4244                               DirEntry->ObjectInformation->FileId.Vnode,
4245                               DirEntry->ObjectInformation->FileId.Unique,
4246                               ntStatus);
4247
4248                 if( NT_SUCCESS( ntStatus))
4249                 {
4250
4251                     ntStatus = STATUS_ACCESS_DENIED;
4252                 }
4253
4254                 try_return( ntStatus);
4255             }
4256
4257             //
4258             // Update the target name
4259             //
4260
4261             AFSAcquireExcl( &DirEntry->NonPaged->Lock,
4262                             TRUE);
4263
4264             ntStatus = AFSUpdateTargetName( &DirEntry->NameInformation.TargetName,
4265                                             &DirEntry->Flags,
4266                                             (WCHAR *)((char *)pDirEntry + pDirEntry->TargetNameOffset),
4267                                             (USHORT)pDirEntry->TargetNameLength);
4268
4269             if( !NT_SUCCESS( ntStatus))
4270             {
4271
4272                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4273                               AFS_TRACE_LEVEL_ERROR,
4274                               "AFSProcessDFSLink UpdateTargetName failed for Fcb %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
4275                               &DirEntry->NameInformation.FileName,
4276                               DirEntry->ObjectInformation->FileId.Cell,
4277                               DirEntry->ObjectInformation->FileId.Volume,
4278                               DirEntry->ObjectInformation->FileId.Vnode,
4279                               DirEntry->ObjectInformation->FileId.Unique,
4280                               ntStatus);
4281
4282                 AFSReleaseResource( &DirEntry->NonPaged->Lock);
4283
4284                 try_return( ntStatus);
4285             }
4286
4287             AFSConvertToShared( &DirEntry->NonPaged->Lock);
4288         }
4289         else
4290         {
4291             AFSAcquireShared( &DirEntry->NonPaged->Lock,
4292                               TRUE);
4293         }
4294
4295         uniReparseName.MaximumLength = uniMUPDeviceName.Length +
4296                                                    sizeof( WCHAR) +
4297                                                    DirEntry->NameInformation.TargetName.Length +
4298                                                    sizeof( WCHAR);
4299
4300         if( RemainingPath != NULL &&
4301             RemainingPath->Length > 0)
4302         {
4303
4304             uniReparseName.MaximumLength += RemainingPath->Length;
4305         }
4306
4307         //
4308         // Allocate the reparse buffer
4309         //
4310
4311         uniReparseName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
4312                                                                    uniReparseName.MaximumLength,
4313                                                                    AFS_REPARSE_NAME_TAG);
4314
4315         if( uniReparseName.Buffer == NULL)
4316         {
4317
4318             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4319                           AFS_TRACE_LEVEL_ERROR,
4320                           "AFSProcessDFSLink uniReparseName.Buffer == NULL Fcb %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
4321                           &DirEntry->NameInformation.FileName,
4322                           DirEntry->ObjectInformation->FileId.Cell,
4323                           DirEntry->ObjectInformation->FileId.Volume,
4324                           DirEntry->ObjectInformation->FileId.Vnode,
4325                           DirEntry->ObjectInformation->FileId.Unique,
4326                           STATUS_INSUFFICIENT_RESOURCES);
4327
4328             AFSReleaseResource( &DirEntry->NonPaged->Lock);
4329
4330             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
4331         }
4332
4333         //
4334         // Start building the name
4335         //
4336
4337         RtlCopyMemory( uniReparseName.Buffer,
4338                        uniMUPDeviceName.Buffer,
4339                        uniMUPDeviceName.Length);
4340
4341         uniReparseName.Length = uniMUPDeviceName.Length;
4342
4343         if( DirEntry->NameInformation.TargetName.Buffer[ 0] != L'\\')
4344         {
4345
4346             uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)] = L'\\';
4347
4348             uniReparseName.Length += sizeof( WCHAR);
4349         }
4350
4351         RtlCopyMemory( &uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)],
4352                        DirEntry->NameInformation.TargetName.Buffer,
4353                        DirEntry->NameInformation.TargetName.Length);
4354
4355         uniReparseName.Length += DirEntry->NameInformation.TargetName.Length;
4356
4357         AFSReleaseResource( &DirEntry->NonPaged->Lock);
4358
4359         if( RemainingPath != NULL &&
4360             RemainingPath->Length > 0)
4361         {
4362
4363             if( uniReparseName.Buffer[ (uniReparseName.Length/sizeof( WCHAR)) - 1] != L'\\' &&
4364                 RemainingPath->Buffer[ 0] != L'\\')
4365             {
4366
4367                 uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)] = L'\\';
4368
4369                 uniReparseName.Length += sizeof( WCHAR);
4370             }
4371
4372             RtlCopyMemory( &uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)],
4373                            RemainingPath->Buffer,
4374                            RemainingPath->Length);
4375
4376             uniReparseName.Length += RemainingPath->Length;
4377         }
4378
4379         //
4380         // Update the name in the file object
4381         //
4382
4383         if( FileObject->FileName.Buffer != NULL)
4384         {
4385
4386             AFSExFreePool( FileObject->FileName.Buffer);
4387         }
4388
4389         FileObject->FileName = uniReparseName;
4390
4391         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4392                       AFS_TRACE_LEVEL_VERBOSE,
4393                       "AFSProcessDFSLink Reparsing access to Fcb %wZ FID %08lX-%08lX-%08lX-%08lX to %wZ\n",
4394                       &DirEntry->NameInformation.FileName,
4395                       DirEntry->ObjectInformation->FileId.Cell,
4396                       DirEntry->ObjectInformation->FileId.Volume,
4397                       DirEntry->ObjectInformation->FileId.Vnode,
4398                       DirEntry->ObjectInformation->FileId.Unique,
4399                       &uniReparseName);
4400
4401         //
4402         // Return status reparse ...
4403         //
4404
4405         ntStatus = STATUS_REPARSE;
4406
4407 try_exit:
4408
4409         if ( pDirEntry)
4410         {
4411
4412             AFSExFreePool( pDirEntry);
4413         }
4414     }
4415
4416     return ntStatus;
4417 }