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, *pExistingDirNode = 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         AFSAcquireExcl( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock,
2009                         TRUE);
2010
2011         //
2012         // Before attempting to insert the new entry, check if we need to validate the parent
2013         //
2014
2015         if( BooleanFlagOn( ParentObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY))
2016         {
2017
2018             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2019                           AFS_TRACE_LEVEL_VERBOSE,
2020                           "AFSCreateDirEntry Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2021                           &ParentDirCB->NameInformation.FileName,
2022                           ParentObjectInfo->FileId.Cell,
2023                           ParentObjectInfo->FileId.Volume,
2024                           ParentObjectInfo->FileId.Vnode,
2025                           ParentObjectInfo->FileId.Unique);
2026
2027             ntStatus = AFSVerifyEntry( AuthGroup,
2028                                        ParentDirCB);
2029
2030             if( !NT_SUCCESS( ntStatus))
2031             {
2032
2033                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2034                               AFS_TRACE_LEVEL_ERROR,
2035                               "AFSCreateDirEntry Failed to verify parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
2036                               &ParentDirCB->NameInformation.FileName,
2037                               ParentObjectInfo->FileId.Cell,
2038                               ParentObjectInfo->FileId.Volume,
2039                               ParentObjectInfo->FileId.Vnode,
2040                               ParentObjectInfo->FileId.Unique,
2041                               ntStatus);
2042
2043                 AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2044
2045                 try_return( ntStatus);
2046             }
2047         }
2048
2049         //
2050         // Check for the entry in the event we raced with some other thread
2051         //
2052
2053         AFSLocateCaseSensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
2054                                         (ULONG)pDirNode->CaseSensitiveTreeEntry.HashIndex,
2055                                         &pExistingDirNode);
2056
2057         if( pExistingDirNode != NULL)
2058         {
2059
2060             AFSDeleteDirEntry( ParentObjectInfo,
2061                                pDirNode);
2062
2063             *DirEntry = pExistingDirNode;
2064
2065             AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2066
2067             try_return( ntStatus = STATUS_SUCCESS);
2068         }
2069
2070         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2071                       AFS_TRACE_LEVEL_VERBOSE_2,
2072                       "AFSCreateDirEntry Inserting dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ\n",
2073                       &ParentDirCB->NameInformation.FileName,
2074                       ParentObjectInfo->FileId.Cell,
2075                       ParentObjectInfo->FileId.Volume,
2076                       ParentObjectInfo->FileId.Vnode,
2077                       ParentObjectInfo->FileId.Unique,
2078                       ComponentName);
2079
2080         //
2081         // Insert the directory node
2082         //
2083
2084         AFSInsertDirectoryNode( ParentObjectInfo,
2085                                 pDirNode,
2086                                 TRUE);
2087
2088         //
2089         // Pass back the dir entry
2090         //
2091
2092         *DirEntry = pDirNode;
2093
2094         AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2095
2096 try_exit:
2097
2098         NOTHING;
2099     }
2100
2101     return ntStatus;
2102 }
2103
2104 void
2105 AFSInsertDirectoryNode( IN AFSObjectInfoCB *ParentObjectInfo,
2106                         IN AFSDirectoryCB *DirEntry,
2107                         IN BOOLEAN InsertInEnumList)
2108 {
2109
2110     __Enter
2111     {
2112
2113         ASSERT( ExIsResourceAcquiredExclusiveLite( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock));
2114
2115         //
2116         // Insert the node into the directory node tree
2117         //
2118
2119         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2120                       AFS_TRACE_LEVEL_VERBOSE,
2121                       "AFSInsertDirectoryNode Insert DE %p for %wZ Clearing NOT_IN flag\n",
2122                       DirEntry,
2123                       &DirEntry->NameInformation.FileName);
2124
2125         ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE);
2126
2127         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead == NULL)
2128         {
2129
2130             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead = DirEntry;
2131
2132             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2133                           AFS_TRACE_LEVEL_VERBOSE,
2134                           "AFSInsertDirectoryNode Insert DE %p to head of case sensitive tree for %wZ\n",
2135                           DirEntry,
2136                           &DirEntry->NameInformation.FileName);
2137         }
2138         else
2139         {
2140
2141             AFSInsertCaseSensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
2142                                             DirEntry);
2143
2144             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2145                           AFS_TRACE_LEVEL_VERBOSE,
2146                           "AFSInsertDirectoryNode Insert DE %p to case sensitive tree for %wZ\n",
2147                           DirEntry,
2148                           &DirEntry->NameInformation.FileName);
2149         }
2150
2151         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead == NULL)
2152         {
2153
2154             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead = DirEntry;
2155
2156             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD);
2157
2158             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2159                           AFS_TRACE_LEVEL_VERBOSE,
2160                           "AFSInsertDirectoryNode Insert DE %p to head of case insensitive tree for %wZ\n",
2161                           DirEntry,
2162                           &DirEntry->NameInformation.FileName);
2163         }
2164         else
2165         {
2166
2167             AFSInsertCaseInsensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
2168                                               DirEntry);
2169
2170             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2171                           AFS_TRACE_LEVEL_VERBOSE,
2172                           "AFSInsertDirectoryNode Insert DE %p to case insensitive tree for %wZ\n",
2173                           DirEntry,
2174                           &DirEntry->NameInformation.FileName);
2175         }
2176
2177         //
2178         // Into the shortname tree
2179         //
2180
2181         if( DirEntry->Type.Data.ShortNameTreeEntry.HashIndex != 0)
2182         {
2183
2184             if( ParentObjectInfo->Specific.Directory.ShortNameTree == NULL)
2185             {
2186
2187                 ParentObjectInfo->Specific.Directory.ShortNameTree = DirEntry;
2188
2189                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2190                               AFS_TRACE_LEVEL_VERBOSE,
2191                               "AFSInsertDirectoryNode Insert DE %p to head of shortname tree for %wZ\n",
2192                               DirEntry,
2193                               &DirEntry->NameInformation.FileName);
2194
2195                 SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_SHORT_NAME);
2196             }
2197             else
2198             {
2199
2200                 if( !NT_SUCCESS( AFSInsertShortNameDirEntry( ParentObjectInfo->Specific.Directory.ShortNameTree,
2201                                                              DirEntry)))
2202                 {
2203                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2204                                   AFS_TRACE_LEVEL_VERBOSE,
2205                                   "AFSInsertDirectoryNode Failed to insert DE %p to shortname tree for %wZ\n",
2206                                   DirEntry,
2207                                   &DirEntry->NameInformation.FileName);
2208                 }
2209                 else
2210                 {
2211                     SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_SHORT_NAME);
2212
2213                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2214                                   AFS_TRACE_LEVEL_VERBOSE,
2215                                   "AFSInsertDirectoryNode Insert DE %p to shortname tree for %wZ\n",
2216                                   DirEntry,
2217                                   &DirEntry->NameInformation.FileName);
2218                 }
2219             }
2220         }
2221
2222         if( InsertInEnumList)
2223         {
2224
2225             //
2226             // And insert the node into the directory list
2227             //
2228
2229             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2230                           AFS_TRACE_LEVEL_VERBOSE,
2231                           "AFSInsertDirectoryNode Inserting entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lXStatus %08lX\n",
2232                           DirEntry,
2233                           &DirEntry->NameInformation.FileName,
2234                           DirEntry->ObjectInformation->FileId.Cell,
2235                           DirEntry->ObjectInformation->FileId.Volume,
2236                           DirEntry->ObjectInformation->FileId.Vnode,
2237                           DirEntry->ObjectInformation->FileId.Unique);
2238
2239             if( ParentObjectInfo->Specific.Directory.DirectoryNodeListHead == NULL)
2240             {
2241
2242                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = DirEntry;
2243             }
2244             else
2245             {
2246
2247                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail->ListEntry.fLink = (void *)DirEntry;
2248
2249                 DirEntry->ListEntry.bLink = (void *)ParentObjectInfo->Specific.Directory.DirectoryNodeListTail;
2250             }
2251
2252             ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = DirEntry;
2253
2254             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2255
2256             InterlockedIncrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2257
2258             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2259                           AFS_TRACE_LEVEL_VERBOSE,
2260                           "AFSInsertDirectoryNode Adding entry %wZ Inc Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2261                               &DirEntry->NameInformation.FileName,
2262                               ParentObjectInfo->Specific.Directory.DirectoryNodeCount,
2263                               ParentObjectInfo->FileId.Cell,
2264                               ParentObjectInfo->FileId.Volume,
2265                               ParentObjectInfo->FileId.Vnode,
2266                               ParentObjectInfo->FileId.Unique);
2267         }
2268     }
2269
2270     return;
2271 }
2272
2273 NTSTATUS
2274 AFSDeleteDirEntry( IN AFSObjectInfoCB *ParentObjectInfo,
2275                    IN AFSDirectoryCB *DirEntry)
2276 {
2277
2278     NTSTATUS ntStatus = STATUS_SUCCESS;
2279
2280     __Enter
2281     {
2282
2283         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2284                       AFS_TRACE_LEVEL_VERBOSE,
2285                       "AFSDeleteDirEntry Deleting dir entry in parent %08lX Entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2286                       ParentObjectInfo,
2287                       DirEntry,
2288                       &DirEntry->NameInformation.FileName,
2289                       DirEntry->ObjectInformation->FileId.Cell,
2290                       DirEntry->ObjectInformation->FileId.Volume,
2291                       DirEntry->ObjectInformation->FileId.Vnode,
2292                       DirEntry->ObjectInformation->FileId.Unique);
2293
2294         AFSRemoveDirNodeFromParent( ParentObjectInfo,
2295                                     DirEntry,
2296                                     TRUE);
2297
2298         //
2299         // Free up the name buffer if it was reallocated
2300         //
2301
2302         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_NAME_BUFFER))
2303         {
2304
2305             AFSExFreePool( DirEntry->NameInformation.FileName.Buffer);
2306         }
2307
2308         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_TARGET_NAME_BUFFER))
2309         {
2310
2311             AFSExFreePool( DirEntry->NameInformation.TargetName.Buffer);
2312         }
2313
2314         //
2315         // Dereference the object for this dir entry
2316         //
2317
2318         ASSERT( DirEntry->ObjectInformation->ObjectReferenceCount > 0);
2319
2320         if( InterlockedDecrement( &DirEntry->ObjectInformation->ObjectReferenceCount) == 0)
2321         {
2322             SetFlag( DirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED);
2323         }
2324
2325         AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2326                       AFS_TRACE_LEVEL_VERBOSE,
2327                       "AFSDeleteDirEntry Decrement count on object %08lX Cnt %d\n",
2328                       DirEntry->ObjectInformation,
2329                       DirEntry->ObjectInformation->ObjectReferenceCount);
2330
2331         ExDeleteResourceLite( &DirEntry->NonPaged->Lock);
2332
2333         AFSExFreePool( DirEntry->NonPaged);
2334
2335         //
2336         // Free up the dir entry
2337         //
2338
2339         AFSExFreePool( DirEntry);
2340     }
2341
2342     return ntStatus;
2343 }
2344
2345 NTSTATUS
2346 AFSRemoveDirNodeFromParent( IN AFSObjectInfoCB *ParentObjectInfo,
2347                             IN AFSDirectoryCB *DirEntry,
2348                             IN BOOLEAN RemoveFromEnumList)
2349 {
2350
2351     NTSTATUS ntStatus = STATUS_SUCCESS;
2352
2353     __Enter
2354     {
2355
2356
2357         ASSERT( ExIsResourceAcquiredExclusiveLite( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock));
2358
2359         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2360                       AFS_TRACE_LEVEL_VERBOSE,
2361                       "AFSRemoveDirNodeFromParent Removing DirEntry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX from Parent %08lX\n",
2362                       DirEntry,
2363                       &DirEntry->NameInformation.FileName,
2364                       DirEntry->ObjectInformation->FileId.Cell,
2365                       DirEntry->ObjectInformation->FileId.Volume,
2366                       DirEntry->ObjectInformation->FileId.Vnode,
2367                       DirEntry->ObjectInformation->FileId.Unique,
2368                       ParentObjectInfo);
2369
2370         if( !BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE))
2371         {
2372
2373             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2374                           AFS_TRACE_LEVEL_VERBOSE,
2375                           "AFSRemoveDirNodeFromParent Removing DirEntry %08lX name %wZ\n",
2376                           DirEntry,
2377                           &DirEntry->NameInformation.FileName);
2378
2379             AFSRemoveNameEntry( ParentObjectInfo,
2380                                 DirEntry);
2381         }
2382         else
2383         {
2384
2385             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2386                           AFS_TRACE_LEVEL_VERBOSE,
2387                           "AFSRemoveDirNodeFromParent DE %p for %wZ NOT removing entry due to flag set\n",
2388                           DirEntry,
2389                           &DirEntry->NameInformation.FileName);
2390
2391         }
2392
2393         if( RemoveFromEnumList &&
2394             BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST))
2395         {
2396
2397             //
2398             // And remove the entry from the enumeration list
2399             //
2400
2401             if( DirEntry->ListEntry.fLink == NULL)
2402             {
2403
2404                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = (AFSDirectoryCB *)DirEntry->ListEntry.bLink;
2405             }
2406             else
2407             {
2408
2409                 ((AFSDirectoryCB *)DirEntry->ListEntry.fLink)->ListEntry.bLink = DirEntry->ListEntry.bLink;
2410             }
2411
2412             if( DirEntry->ListEntry.bLink == NULL)
2413             {
2414
2415                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = (AFSDirectoryCB *)DirEntry->ListEntry.fLink;
2416             }
2417             else
2418             {
2419
2420                 ((AFSDirectoryCB *)DirEntry->ListEntry.bLink)->ListEntry.fLink = DirEntry->ListEntry.fLink;
2421             }
2422
2423             ASSERT( ParentObjectInfo->Specific.Directory.DirectoryNodeCount > 0);
2424
2425             InterlockedDecrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2426
2427             ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2428
2429             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2430                           AFS_TRACE_LEVEL_VERBOSE,
2431                           "AFSRemoveDirNodeFromParent Removing entry %wZ Dec Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2432                           &DirEntry->NameInformation.FileName,
2433                           ParentObjectInfo->Specific.Directory.DirectoryNodeCount,
2434                           ParentObjectInfo->FileId.Cell,
2435                           ParentObjectInfo->FileId.Volume,
2436                           ParentObjectInfo->FileId.Vnode,
2437                           ParentObjectInfo->FileId.Unique);
2438
2439             DirEntry->ListEntry.fLink = NULL;
2440             DirEntry->ListEntry.bLink = NULL;
2441         }
2442     }
2443
2444     return ntStatus;
2445 }
2446
2447 NTSTATUS
2448 AFSFixupTargetName( IN OUT PUNICODE_STRING FileName,
2449                     IN OUT PUNICODE_STRING TargetFileName)
2450 {
2451
2452     NTSTATUS ntStatus = STATUS_SUCCESS;
2453     UNICODE_STRING uniFileName;
2454
2455     __Enter
2456     {
2457
2458         //
2459         // We will process backwards from the end of the name looking
2460         // for the first \ we encounter
2461         //
2462
2463         uniFileName.Length = FileName->Length;
2464         uniFileName.MaximumLength = FileName->MaximumLength;
2465
2466         uniFileName.Buffer = FileName->Buffer;
2467
2468         while( TRUE)
2469         {
2470
2471             if( uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) - 1] == L'\\')
2472             {
2473
2474                 //
2475                 // Subtract one more character off of the filename if it is not the root
2476                 //
2477
2478                 if( uniFileName.Length > sizeof( WCHAR))
2479                 {
2480
2481                     uniFileName.Length -= sizeof( WCHAR);
2482                 }
2483
2484                 //
2485                 // Now build up the target name
2486                 //
2487
2488                 TargetFileName->Length = FileName->Length - uniFileName.Length;
2489
2490                 //
2491                 // If we are not on the root then fixup the name
2492                 //
2493
2494                 if( uniFileName.Length > sizeof( WCHAR))
2495                 {
2496
2497                     TargetFileName->Length -= sizeof( WCHAR);
2498
2499                     TargetFileName->Buffer = &uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) + 1];
2500                 }
2501                 else
2502                 {
2503
2504                     TargetFileName->Buffer = &uniFileName.Buffer[ uniFileName.Length/sizeof( WCHAR)];
2505                 }
2506
2507                 //
2508                 // Fixup the passed back filename length
2509                 //
2510
2511                 FileName->Length = uniFileName.Length;
2512
2513                 TargetFileName->MaximumLength = TargetFileName->Length;
2514
2515                 break;
2516             }
2517
2518             uniFileName.Length -= sizeof( WCHAR);
2519         }
2520     }
2521
2522     return ntStatus;
2523 }
2524
2525 NTSTATUS
2526 AFSParseName( IN PIRP Irp,
2527               IN GUID *AuthGroup,
2528               OUT PUNICODE_STRING FileName,
2529               OUT PUNICODE_STRING ParsedFileName,
2530               OUT PUNICODE_STRING RootFileName,
2531               OUT ULONG *ParseFlags,
2532               OUT AFSVolumeCB   **VolumeCB,
2533               OUT AFSDirectoryCB **ParentDirectoryCB,
2534               OUT AFSNameArrayHdr **NameArray)
2535 {
2536
2537     NTSTATUS            ntStatus = STATUS_SUCCESS;
2538     PIO_STACK_LOCATION  pIrpSp = IoGetCurrentIrpStackLocation( Irp);
2539     AFSDeviceExt       *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2540     UNICODE_STRING      uniFullName, uniComponentName, uniRemainingPath;
2541     ULONG               ulCRC = 0;
2542     AFSDirectoryCB     *pDirEntry = NULL, *pShareDirEntry = NULL, *pTargetDirEntry = NULL;
2543     USHORT              usIndex = 0, usDriveIndex = 0;
2544     AFSCcb             *pRelatedCcb = NULL;
2545     AFSNameArrayHdr    *pNameArray = NULL, *pRelatedNameArray = NULL;
2546     USHORT              usComponentIndex = 0;
2547     USHORT              usComponentLength = 0;
2548     AFSVolumeCB        *pVolumeCB = NULL;
2549     AFSFcb             *pRelatedFcb = NULL;
2550     BOOLEAN             bReleaseTreeLock = FALSE;
2551     BOOLEAN             bIsAllShare = FALSE;
2552
2553     __Enter
2554     {
2555
2556         //
2557         // Indicate we are opening a root ...
2558         //
2559
2560         *ParseFlags = AFS_PARSE_FLAG_ROOT_ACCESS;
2561
2562         if( pIrpSp->FileObject->RelatedFileObject != NULL)
2563         {
2564
2565             pRelatedFcb = (AFSFcb *)pIrpSp->FileObject->RelatedFileObject->FsContext;
2566
2567             pRelatedCcb = (AFSCcb *)pIrpSp->FileObject->RelatedFileObject->FsContext2;
2568
2569             pRelatedNameArray = pRelatedCcb->NameArray;
2570
2571             uniFullName = pIrpSp->FileObject->FileName;
2572
2573             ASSERT( pRelatedFcb != NULL);
2574
2575             //
2576             // No wild cards in the name
2577             //
2578
2579             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2580                           AFS_TRACE_LEVEL_VERBOSE_2,
2581                           "AFSParseName (%08lX) Relative open for %wZ FID %08lX-%08lX-%08lX-%08lX component %wZ\n",
2582                           Irp,
2583                           &pRelatedCcb->DirectoryCB->NameInformation.FileName,
2584                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Cell,
2585                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Volume,
2586                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Vnode,
2587                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Unique,
2588                           &uniFullName);
2589
2590             if( FsRtlDoesNameContainWildCards( &uniFullName))
2591             {
2592
2593                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2594                               AFS_TRACE_LEVEL_ERROR,
2595                               "AFSParseName (%08lX) Component %wZ contains wild cards\n",
2596                               Irp,
2597                               &uniFullName);
2598
2599                 try_return( ntStatus = STATUS_OBJECT_NAME_INVALID);
2600             }
2601
2602             pVolumeCB = pRelatedFcb->ObjectInformation->VolumeCB;
2603
2604             pDirEntry = pRelatedCcb->DirectoryCB;
2605
2606             *FileName = pIrpSp->FileObject->FileName;
2607
2608             //
2609             // Grab the root node exclusive before returning
2610             //
2611
2612             AFSAcquireExcl( pVolumeCB->VolumeLock,
2613                             TRUE);
2614
2615             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID) ||
2616                 BooleanFlagOn( pVolumeCB->Flags, AFS_VOLUME_FLAGS_OFFLINE))
2617             {
2618
2619                 //
2620                 // The volume has been taken off line so fail the access
2621                 //
2622
2623                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2624                               AFS_TRACE_LEVEL_ERROR,
2625                               "AFSParseName (%08lX) Volume %08lX:%08lX OFFLINE/INVALID\n",
2626                               Irp,
2627                               pVolumeCB->ObjectInformation.FileId.Cell,
2628                               pVolumeCB->ObjectInformation.FileId.Volume);
2629
2630                 AFSReleaseResource( pVolumeCB->VolumeLock);
2631
2632                 try_return( ntStatus = STATUS_DEVICE_NOT_READY);
2633             }
2634
2635             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_VERIFY))
2636             {
2637
2638                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2639                               AFS_TRACE_LEVEL_VERBOSE,
2640                               "AFSParseName (%08lX) Verifying root of volume %08lX:%08lX\n",
2641                               Irp,
2642                               pVolumeCB->ObjectInformation.FileId.Cell,
2643                               pVolumeCB->ObjectInformation.FileId.Volume);
2644
2645                 ntStatus = AFSVerifyVolume( (ULONGLONG)PsGetCurrentProcessId(),
2646                                             pVolumeCB);
2647
2648                 if( !NT_SUCCESS( ntStatus))
2649                 {
2650
2651                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2652                                   AFS_TRACE_LEVEL_ERROR,
2653                                   "AFSParseName (%08lX) Failed verification of root Status %08lX\n",
2654                                   Irp,
2655                                   ntStatus);
2656
2657                     AFSReleaseResource( pVolumeCB->VolumeLock);
2658
2659                     try_return( ntStatus);
2660                 }
2661             }
2662
2663             AFSConvertToShared( pVolumeCB->VolumeLock);
2664
2665             if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY))
2666             {
2667
2668                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2669                               AFS_TRACE_LEVEL_VERBOSE,
2670                               "AFSParseName (%08lX) Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2671                               Irp,
2672                               &pDirEntry->NameInformation.FileName,
2673                               pDirEntry->ObjectInformation->FileId.Cell,
2674                               pDirEntry->ObjectInformation->FileId.Volume,
2675                               pDirEntry->ObjectInformation->FileId.Vnode,
2676                               pDirEntry->ObjectInformation->FileId.Unique);
2677
2678                 ntStatus = AFSVerifyEntry( AuthGroup,
2679                                            pDirEntry);
2680
2681                 if( !NT_SUCCESS( ntStatus))
2682                 {
2683
2684                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2685                                   AFS_TRACE_LEVEL_VERBOSE,
2686                                   "AFSParseName (%08lX) Failed verification of parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
2687                                   Irp,
2688                                   &pDirEntry->NameInformation.FileName,
2689                                   pDirEntry->ObjectInformation->FileId.Cell,
2690                                   pDirEntry->ObjectInformation->FileId.Volume,
2691                                   pDirEntry->ObjectInformation->FileId.Vnode,
2692                                   pDirEntry->ObjectInformation->FileId.Unique,
2693                                   ntStatus);
2694
2695                     AFSReleaseResource( pVolumeCB->VolumeLock);
2696
2697                     try_return( ntStatus);
2698                 }
2699             }
2700
2701             //
2702             // Create our full path name buffer
2703             //
2704
2705             uniFullName.MaximumLength = pRelatedCcb->FullFileName.Length +
2706                                                     sizeof( WCHAR) +
2707                                                     pIrpSp->FileObject->FileName.Length +
2708                                                     sizeof( WCHAR);
2709
2710             uniFullName.Length = 0;
2711
2712             uniFullName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
2713                                                                     uniFullName.MaximumLength,
2714                                                                     AFS_NAME_BUFFER_THREE_TAG);
2715
2716             if( uniFullName.Buffer == NULL)
2717             {
2718
2719                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2720                               AFS_TRACE_LEVEL_ERROR,
2721                               "AFSParseName (%08lX) Failed to allocate full name buffer\n",
2722                               Irp);
2723
2724                 AFSReleaseResource( pVolumeCB->VolumeLock);
2725
2726                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2727             }
2728
2729             RtlZeroMemory( uniFullName.Buffer,
2730                            uniFullName.MaximumLength);
2731
2732             RtlCopyMemory( uniFullName.Buffer,
2733                            pRelatedCcb->FullFileName.Buffer,
2734                            pRelatedCcb->FullFileName.Length);
2735
2736             uniFullName.Length = pRelatedCcb->FullFileName.Length;
2737
2738             usComponentIndex = (USHORT)(uniFullName.Length/sizeof( WCHAR));
2739
2740             usComponentLength = pIrpSp->FileObject->FileName.Length;
2741
2742             if( uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR)) - 1] != L'\\' &&
2743                 pIrpSp->FileObject->FileName.Length > 0 &&
2744                 pIrpSp->FileObject->FileName.Buffer[ 0] != L'\\' &&
2745                 pIrpSp->FileObject->FileName.Buffer[ 0] != L':')
2746             {
2747
2748                 uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR))] = L'\\';
2749
2750                 uniFullName.Length += sizeof( WCHAR);
2751
2752                 usComponentLength += sizeof( WCHAR);
2753             }
2754
2755             if( pIrpSp->FileObject->FileName.Length > 0)
2756             {
2757
2758                 RtlCopyMemory( &uniFullName.Buffer[ uniFullName.Length/sizeof( WCHAR)],
2759                                pIrpSp->FileObject->FileName.Buffer,
2760                                pIr\epSp->FileObject->FileName.Length);
2761
2762                 uniFullName.Length += pIrpSp->FileObject->FileName.Length;
2763             }
2764
2765             *RootFileName = uniFullName;
2766
2767             //
2768             // We populate up to the current parent
2769             //
2770
2771             if( pRelatedNameArray == NULL)
2772             {
2773
2774                 //
2775                 // Init and populate our name array
2776                 //
2777
2778                 pNameArray = AFSInitNameArray( NULL,
2779                                                0);
2780
2781                 if( pNameArray == NULL)
2782                 {
2783
2784                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2785                                   AFS_TRACE_LEVEL_VERBOSE,
2786                                   "AFSParseName (%08lX) Failed to initialize name array\n",
2787                                   Irp);
2788
2789                     AFSExFreePool( uniFullName.Buffer);
2790
2791                     AFSReleaseResource( pVolumeCB->VolumeLock);
2792
2793                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2794                 }
2795
2796                 ntStatus = AFSPopulateNameArray( pNameArray,
2797                                                  NULL,
2798                                                  pRelatedCcb->DirectoryCB);
2799             }
2800             else
2801             {
2802
2803                 //
2804                 // Init and populate our name array
2805                 //
2806
2807                 pNameArray = AFSInitNameArray( NULL,
2808                                                pRelatedNameArray->MaxElementCount);
2809
2810                 if( pNameArray == NULL)
2811                 {
2812
2813                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2814                                   AFS_TRACE_LEVEL_VERBOSE,
2815                                   "AFSParseName (%08lX) Failed to initialize name array\n",
2816                                   Irp);
2817
2818                     AFSExFreePool( uniFullName.Buffer);
2819
2820                     AFSReleaseResource( pVolumeCB->VolumeLock);
2821
2822                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2823                 }
2824
2825                 ntStatus = AFSPopulateNameArrayFromRelatedArray( pNameArray,
2826                                                                  pRelatedNameArray,
2827                                                                  pRelatedCcb->DirectoryCB);
2828             }
2829
2830             if( !NT_SUCCESS( ntStatus))
2831             {
2832
2833                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2834                               AFS_TRACE_LEVEL_VERBOSE,
2835                               "AFSParseName (%08lX) Failed to populate name array\n",
2836                               Irp);
2837
2838                 AFSExFreePool( uniFullName.Buffer);
2839
2840                 AFSReleaseResource( pVolumeCB->VolumeLock);
2841
2842                 try_return( ntStatus);
2843             }
2844
2845             ParsedFileName->Length = usComponentLength;
2846             ParsedFileName->MaximumLength = uniFullName.MaximumLength;
2847
2848             ParsedFileName->Buffer = &uniFullName.Buffer[ usComponentIndex];
2849
2850             //
2851             // Indicate to caller that RootFileName must be freed
2852             //
2853
2854             SetFlag( *ParseFlags, AFS_PARSE_FLAG_FREE_FILE_BUFFER);
2855
2856             *NameArray = pNameArray;
2857
2858             *VolumeCB = pVolumeCB;
2859
2860             //
2861             // Increment our volume reference count
2862             //
2863
2864             InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
2865
2866             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
2867                           AFS_TRACE_LEVEL_VERBOSE,
2868                           "AFSParseName Increment count on volume %08lX Cnt %d\n",
2869                           pVolumeCB,
2870                           pVolumeCB->VolumeReferenceCount);
2871
2872             *ParentDirectoryCB = pDirEntry;
2873
2874             InterlockedIncrement( &pDirEntry->OpenReferenceCount);
2875
2876             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
2877                           AFS_TRACE_LEVEL_VERBOSE,
2878                           "AFSParseName Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
2879                           &pDirEntry->NameInformation.FileName,
2880                           pDirEntry,
2881                           NULL,
2882                           pDirEntry->OpenReferenceCount);
2883
2884             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2885                           AFS_TRACE_LEVEL_VERBOSE_2,
2886                           "AFSParseName (%08lX) Returning full name %wZ\n",
2887                           Irp,
2888                           &uniFullName);
2889
2890             try_return( ntStatus);
2891         }
2892
2893         //
2894         // No wild cards in the name
2895         //
2896
2897         uniFullName = pIrpSp->FileObject->FileName;
2898
2899         if( FsRtlDoesNameContainWildCards( &uniFullName) ||
2900             uniFullName.Length < AFSServerName.Length)
2901         {
2902
2903             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2904                           AFS_TRACE_LEVEL_ERROR,
2905                           "AFSParseName (%08lX) Name %wZ contains wild cards or too short\n",
2906                           Irp,
2907                           &uniFullName);
2908
2909             try_return( ntStatus = STATUS_OBJECT_NAME_INVALID);
2910         }
2911
2912         //
2913         // The name is a fully qualified name. Parse out the server/share names and
2914         // point to the root qualified name
2915         // First thing is to locate the server name
2916         //
2917
2918         FsRtlDissectName( uniFullName,
2919                           &uniComponentName,
2920                           &uniRemainingPath);
2921
2922         uniFullName = uniRemainingPath;
2923
2924         //
2925         // This component is the server name we are serving
2926         //
2927
2928         if( RtlCompareUnicodeString( &uniComponentName,
2929                                      &AFSServerName,
2930                                      TRUE) != 0)
2931         {
2932
2933             //
2934             // Drive letter based name?
2935             //
2936
2937             uniFullName = pIrpSp->FileObject->FileName;
2938
2939             while( usIndex < uniFullName.Length/sizeof( WCHAR))
2940             {
2941
2942                 if( uniFullName.Buffer[ usIndex] == L':')
2943                 {
2944
2945                     uniFullName.Buffer = &uniFullName.Buffer[ usIndex + 2];
2946
2947                     uniFullName.Length -= (usIndex + 2) * sizeof( WCHAR);
2948
2949                     usDriveIndex = usIndex - 1;
2950
2951                     break;
2952                 }
2953
2954                 usIndex++;
2955             }
2956
2957             //
2958             // Do we have the right server name now?
2959             //
2960
2961             FsRtlDissectName( uniFullName,
2962                               &uniComponentName,
2963                               &uniRemainingPath);
2964
2965             uniFullName = uniRemainingPath;
2966
2967             //
2968             // This component is the server name we are serving
2969             //
2970
2971             if( RtlCompareUnicodeString( &uniComponentName,
2972                                          &AFSServerName,
2973                                          TRUE) != 0)
2974             {
2975
2976                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2977                               AFS_TRACE_LEVEL_ERROR,
2978                               "AFSParseName (%08lX) Name %wZ does not have server name\n",
2979                               Irp,
2980                               &pIrpSp->FileObject->FileName);
2981
2982                 try_return( ntStatus = STATUS_BAD_NETWORK_NAME);
2983             }
2984
2985             //
2986             // Validate this drive letter is actively mapped
2987             //
2988
2989             if( usDriveIndex > 0 &&
2990                 !AFSIsDriveMapped( pIrpSp->FileObject->FileName.Buffer[ usDriveIndex]))
2991             {
2992
2993                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2994                               AFS_TRACE_LEVEL_ERROR,
2995                               "AFSParseName (%08lX) Name %wZ contains invalid drive mapping\n",
2996                               Irp,
2997                               &pIrpSp->FileObject->FileName);
2998
2999                 try_return( ntStatus = STATUS_BAD_NETWORK_NAME);
3000             }
3001         }
3002
3003         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3004                       AFS_TRACE_LEVEL_VERBOSE_2,
3005                       "AFSParseName (%08lX) Processing full name %wZ\n",
3006                       Irp,
3007                       &uniFullName);
3008
3009         if( uniFullName.Length > 0 &&
3010             uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR)) - 1] == L'\\')
3011         {
3012
3013             uniFullName.Length -= sizeof( WCHAR);
3014         }
3015
3016         //
3017         // Be sure we are online and ready to go
3018         //
3019
3020         AFSAcquireExcl( AFSGlobalRoot->VolumeLock,
3021                         TRUE);
3022
3023         if( BooleanFlagOn( AFSGlobalRoot->ObjectInformation.Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID) ||
3024             BooleanFlagOn( AFSGlobalRoot->Flags, AFS_VOLUME_FLAGS_OFFLINE))
3025         {
3026
3027             //
3028             // The volume has been taken off line so fail the access
3029             //
3030
3031             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3032                           AFS_TRACE_LEVEL_ERROR,
3033                           "AFSParseName (%08lX) Volume %08lX:%08lX OFFLINE/INVALID\n",
3034                           Irp,
3035                           AFSGlobalRoot->ObjectInformation.FileId.Cell,
3036                           AFSGlobalRoot->ObjectInformation.FileId.Volume);
3037
3038             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3039
3040             try_return( ntStatus = STATUS_DEVICE_NOT_READY);
3041         }
3042
3043         if( BooleanFlagOn( AFSGlobalRoot->ObjectInformation.Flags, AFS_OBJECT_FLAGS_VERIFY))
3044         {
3045
3046             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3047                           AFS_TRACE_LEVEL_VERBOSE,
3048                           "AFSParseName (%08lX) Verifying root of volume %08lX:%08lX\n",
3049                           Irp,
3050                           AFSGlobalRoot->ObjectInformation.FileId.Cell,
3051                           AFSGlobalRoot->ObjectInformation.FileId.Volume);
3052
3053             ntStatus = AFSVerifyVolume( (ULONGLONG)PsGetCurrentProcessId(),
3054                                         AFSGlobalRoot);
3055
3056             if( !NT_SUCCESS( ntStatus))
3057             {
3058
3059                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3060                               AFS_TRACE_LEVEL_ERROR,
3061                               "AFSParseName (%08lX) Failed verification of root Status %08lX\n",
3062                               Irp,
3063                               ntStatus);
3064
3065                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3066
3067                 try_return( ntStatus);
3068             }
3069         }
3070
3071         if( !BooleanFlagOn( AFSGlobalRoot->ObjectInformation.Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
3072         {
3073
3074             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3075                           AFS_TRACE_LEVEL_VERBOSE,
3076                           "AFSParseName (%08lX) Enumerating global root of volume %08lX:%08lX\n",
3077                           Irp,
3078                           AFSGlobalRoot->ObjectInformation.FileId.Cell,
3079                           AFSGlobalRoot->ObjectInformation.FileId.Volume);
3080
3081             ntStatus = AFSEnumerateGlobalRoot( AuthGroup);
3082
3083             if( !NT_SUCCESS( ntStatus))
3084             {
3085
3086                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3087                               AFS_TRACE_LEVEL_ERROR,
3088                               "AFSParseName (%08lX) Failed enumeraiton of root Status %08lX\n",
3089                               Irp,
3090                               ntStatus);
3091
3092                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3093
3094                 try_return( ntStatus);
3095             }
3096         }
3097
3098         //
3099         // Check for the \\Server access and return it as though it where \\Server\Globalroot
3100         //
3101
3102         if( uniRemainingPath.Buffer == NULL ||
3103             ( uniRemainingPath.Length == sizeof( WCHAR) &&
3104               uniRemainingPath.Buffer[ 0] == L'\\'))
3105         {
3106
3107             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3108                           AFS_TRACE_LEVEL_VERBOSE_2,
3109                           "AFSParseName (%08lX) Returning global root access\n",
3110                           Irp);
3111
3112             InterlockedIncrement( &AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3113
3114             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3115                           AFS_TRACE_LEVEL_VERBOSE,
3116                           "AFSParseName Increment2 count on %wZ DE %p Ccb %p Cnt %d\n",
3117                           &AFSGlobalRoot->DirectoryCB->NameInformation.FileName,
3118                           AFSGlobalRoot->DirectoryCB,
3119                           NULL,
3120                           AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3121
3122             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3123
3124             *VolumeCB = NULL;
3125
3126             FileName->Length = 0;
3127             FileName->MaximumLength = 0;
3128             FileName->Buffer = NULL;
3129
3130             try_return( ntStatus = STATUS_SUCCESS);
3131         }
3132
3133         *RootFileName = uniFullName;
3134
3135         //
3136         // Include the starting \ in the root name
3137         //
3138
3139         if( RootFileName->Buffer[ 0] != L'\\')
3140         {
3141             RootFileName->Buffer--;
3142             RootFileName->Length += sizeof( WCHAR);
3143             RootFileName->MaximumLength += sizeof( WCHAR);
3144         }
3145
3146         //
3147         // Get the 'share' name
3148         //
3149
3150         FsRtlDissectName( uniFullName,
3151                           &uniComponentName,
3152                           &uniRemainingPath);
3153
3154         //
3155         // If this is the ALL access then perform some additional processing
3156         //
3157
3158         if( RtlCompareUnicodeString( &uniComponentName,
3159                                      &AFSGlobalRootName,
3160                                      TRUE) == 0)
3161         {
3162
3163             bIsAllShare = TRUE;
3164
3165             //
3166             // If there is nothing else then get out
3167             //
3168
3169             if( uniRemainingPath.Buffer == NULL ||
3170                 uniRemainingPath.Length == 0 ||
3171                 ( uniRemainingPath.Length == sizeof( WCHAR) &&
3172                   uniRemainingPath.Buffer[ 0] == L'\\'))
3173             {
3174
3175                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3176                               AFS_TRACE_LEVEL_VERBOSE_2,
3177                               "AFSParseName (%08lX) Returning global root access\n",
3178                               Irp);
3179
3180                 InterlockedIncrement( &AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3181
3182                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3183                               AFS_TRACE_LEVEL_VERBOSE,
3184                               "AFSParseName Increment3 count on %wZ DE %p Ccb %p Cnt %d\n",
3185                               &AFSGlobalRoot->DirectoryCB->NameInformation.FileName,
3186                               AFSGlobalRoot->DirectoryCB,
3187                               NULL,
3188                               AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3189
3190                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3191
3192                 *VolumeCB = NULL;
3193
3194                 FileName->Length = 0;
3195                 FileName->MaximumLength = 0;
3196                 FileName->Buffer = NULL;
3197
3198                 try_return( ntStatus = STATUS_SUCCESS);
3199             }
3200
3201             //
3202             // Process the name again to strip off the ALL portion
3203             //
3204
3205             uniFullName = uniRemainingPath;
3206
3207             FsRtlDissectName( uniFullName,
3208                               &uniComponentName,
3209                               &uniRemainingPath);
3210
3211             //
3212             // Check for the PIOCtl name
3213             //
3214
3215             if( RtlCompareUnicodeString( &uniComponentName,
3216                                          &AFSPIOCtlName,
3217                                          TRUE) == 0)
3218             {
3219
3220                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3221                               AFS_TRACE_LEVEL_VERBOSE_2,
3222                               "AFSParseName (%08lX) Returning root PIOCtl access\n",
3223                               Irp);
3224
3225                 InterlockedIncrement( &AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3226
3227                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3228                               AFS_TRACE_LEVEL_VERBOSE,
3229                               "AFSParseName Increment4 count on %wZ DE %p Ccb %p Cnt %d\n",
3230                               &AFSGlobalRoot->DirectoryCB->NameInformation.FileName,
3231                               AFSGlobalRoot->DirectoryCB,
3232                               NULL,
3233                               AFSGlobalRoot->DirectoryCB->OpenReferenceCount);
3234
3235                 AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3236
3237                 ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3238
3239                 *VolumeCB = NULL;
3240
3241                 *FileName = AFSPIOCtlName;
3242
3243                 try_return( ntStatus = STATUS_SUCCESS);
3244             }
3245         }
3246         else if( (pDirEntry = AFSGetSpecialShareNameEntry( &uniComponentName,
3247                                                            &uniRemainingPath)) != NULL)
3248         {
3249
3250             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3251                           AFS_TRACE_LEVEL_VERBOSE_2,
3252                           "AFSParseName (%08lX) Returning root share name %wZ access\n",
3253                           Irp,
3254                           &uniComponentName);
3255
3256             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3257
3258             //
3259             // Add in the full share name to pass back
3260             //
3261
3262             if( uniRemainingPath.Buffer != NULL)
3263             {
3264
3265                 //
3266                 // This routine strips off the leading slash so add it back in
3267                 //
3268
3269                 uniRemainingPath.Buffer--;
3270                 uniRemainingPath.Length += sizeof( WCHAR);
3271                 uniRemainingPath.MaximumLength += sizeof( WCHAR);
3272
3273                 //
3274                 // And the cell name
3275                 //
3276
3277                 uniRemainingPath.Buffer -= (uniComponentName.Length/sizeof( WCHAR));
3278                 uniRemainingPath.Length += uniComponentName.Length;
3279                 uniRemainingPath.MaximumLength += uniComponentName.Length;
3280
3281                 uniComponentName = uniRemainingPath;
3282             }
3283
3284             *VolumeCB = NULL;
3285
3286             *FileName = uniComponentName;
3287
3288             *ParentDirectoryCB = pDirEntry;
3289
3290             ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3291
3292             InterlockedIncrement( &pDirEntry->OpenReferenceCount);
3293
3294             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3295                           AFS_TRACE_LEVEL_VERBOSE,
3296                           "AFSParseName Increment5 count on %wZ DE %p Ccb %p Cnt %d\n",
3297                           &pDirEntry->NameInformation.FileName,
3298                           pDirEntry,
3299                           NULL,
3300                           pDirEntry->OpenReferenceCount);
3301
3302             try_return( ntStatus = STATUS_SUCCESS);
3303         }
3304
3305         //
3306         // Determine the 'share' we are accessing
3307         //
3308
3309         ulCRC = AFSGenerateCRC( &uniComponentName,
3310                                 FALSE);
3311
3312         AFSAcquireShared( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock,
3313                           TRUE);
3314
3315         bReleaseTreeLock = TRUE;
3316
3317         AFSLocateCaseSensitiveDirEntry( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
3318                                         ulCRC,
3319                                         &pDirEntry);
3320
3321         if( pDirEntry == NULL)
3322         {
3323
3324             ulCRC = AFSGenerateCRC( &uniComponentName,
3325                                     TRUE);
3326
3327             AFSLocateCaseInsensitiveDirEntry( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
3328                                               ulCRC,
3329                                               &pDirEntry);
3330
3331             if( pDirEntry == NULL)
3332             {
3333
3334                 //
3335                 // OK, if this component is a valid short name then try
3336                 // a lookup in the short name tree
3337                 //
3338
3339                 if( RtlIsNameLegalDOS8Dot3( &uniComponentName,
3340                                             NULL,
3341                                             NULL))
3342                 {
3343
3344                     AFSLocateShortNameDirEntry( AFSGlobalRoot->ObjectInformation.Specific.Directory.ShortNameTree,
3345                                                 ulCRC,
3346                                                 &pDirEntry);
3347                 }
3348
3349                 if( pDirEntry == NULL)
3350                 {
3351
3352                     //
3353                     // Check with the service whether it is a valid cell name
3354                     //
3355
3356                     AFSReleaseResource( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock);
3357
3358                     bReleaseTreeLock = FALSE;
3359
3360                     ntStatus = AFSCheckCellName( AuthGroup,
3361                                                  &uniComponentName,
3362                                                  &pDirEntry);
3363
3364                     if( !NT_SUCCESS( ntStatus))
3365                     {
3366                         AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3367
3368                         if ( bIsAllShare &&
3369                              uniRemainingPath.Length == 0 &&
3370                              ntStatus == STATUS_OBJECT_PATH_NOT_FOUND)
3371                         {
3372
3373                             ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
3374                         }
3375
3376                         try_return( ntStatus);
3377                     }
3378                 }
3379             }
3380         }
3381
3382         if( bReleaseTreeLock)
3383         {
3384             AFSReleaseResource( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock);
3385         }
3386
3387         //
3388         // Be sure we are starting from the correct volume
3389         //
3390
3391         if( pDirEntry->ObjectInformation->VolumeCB != AFSGlobalRoot)
3392         {
3393
3394             //
3395             // We dropped the global root in the CheckCellName routine which is the
3396             // only way we can be here
3397             //
3398
3399             pVolumeCB = pDirEntry->ObjectInformation->VolumeCB;
3400
3401             //
3402             // In this case don't add back in the 'share' name since that is where we are
3403             // starting. Just put the leading slash back in
3404             //
3405
3406             if( uniRemainingPath.Buffer != NULL)
3407             {
3408
3409                 uniRemainingPath.Buffer--;
3410                 uniRemainingPath.Length += sizeof( WCHAR);
3411                 uniRemainingPath.MaximumLength += sizeof( WCHAR);
3412
3413                 if( uniRemainingPath.Length > sizeof( WCHAR))
3414                 {
3415
3416                     ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3417                 }
3418
3419                 //
3420                 // Pass back the parent being the root of the volume
3421                 //
3422
3423                 *ParentDirectoryCB = pVolumeCB->DirectoryCB;
3424             }
3425             else
3426             {
3427
3428                 //
3429                 // Pass back a root slash
3430                 //
3431
3432                 uniRemainingPath = uniComponentName;
3433
3434                 uniRemainingPath.Buffer--;
3435                 uniRemainingPath.Length = sizeof( WCHAR);
3436                 uniRemainingPath.MaximumLength = sizeof( WCHAR);
3437
3438                 //
3439                 // This is a root open so pass back no parent
3440                 //
3441
3442                 *ParentDirectoryCB = NULL;
3443             }
3444         }
3445         else
3446         {
3447
3448             pVolumeCB = AFSGlobalRoot;
3449
3450             //
3451             // Add back in the 'share' portion of the name since we will parse it out on return
3452             //
3453
3454             if( uniRemainingPath.Buffer != NULL)
3455             {
3456
3457                 //
3458                 // This routine strips off the leading slash so add it back in
3459                 //
3460
3461                 uniRemainingPath.Buffer--;
3462                 uniRemainingPath.Length += sizeof( WCHAR);
3463                 uniRemainingPath.MaximumLength += sizeof( WCHAR);
3464
3465                 if( uniRemainingPath.Length > sizeof( WCHAR))
3466                 {
3467
3468                     ClearFlag( *ParseFlags, AFS_PARSE_FLAG_ROOT_ACCESS);
3469                 }
3470
3471                 //
3472                 // And the cell name
3473                 //
3474
3475                 uniRemainingPath.Buffer -= (uniComponentName.Length/sizeof( WCHAR));
3476                 uniRemainingPath.Length += uniComponentName.Length;
3477                 uniRemainingPath.MaximumLength += uniComponentName.Length;
3478             }
3479             else
3480             {
3481
3482                 uniRemainingPath = uniComponentName;
3483             }
3484
3485             //
3486             // And the leading slash again ...
3487             //
3488
3489             uniRemainingPath.Buffer--;
3490             uniRemainingPath.Length += sizeof( WCHAR);
3491             uniRemainingPath.MaximumLength += sizeof( WCHAR);
3492
3493             InterlockedIncrement( &pVolumeCB->DirectoryCB->OpenReferenceCount);
3494
3495             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3496                           AFS_TRACE_LEVEL_VERBOSE,
3497                           "AFSParseName Increment6 count on %wZ DE %p Ccb %p Cnt %d\n",
3498                           &pVolumeCB->DirectoryCB->NameInformation.FileName,
3499                           pVolumeCB->DirectoryCB,
3500                           NULL,
3501                           pVolumeCB->DirectoryCB->OpenReferenceCount);
3502
3503             //
3504             // Pass back the parent being the volume root
3505             //
3506
3507             *ParentDirectoryCB = pVolumeCB->DirectoryCB;
3508         }
3509
3510         //
3511         // We only need the volume shared at this point
3512         //
3513
3514         AFSConvertToShared( pVolumeCB->VolumeLock);
3515
3516         //
3517         // Init our name array
3518         //
3519
3520         pNameArray = AFSInitNameArray( pVolumeCB->DirectoryCB,
3521                                        0);
3522
3523         if( pNameArray == NULL)
3524         {
3525
3526             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3527                           AFS_TRACE_LEVEL_VERBOSE,
3528                           "AFSParseName (%08lX) Failed to initialize name array\n",
3529                           Irp);
3530
3531             AFSReleaseResource( pVolumeCB->VolumeLock);
3532
3533             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
3534         }
3535
3536         //
3537         // Return the remaining portion as the file name
3538         //
3539
3540         *FileName = uniRemainingPath;
3541
3542         *ParsedFileName = uniRemainingPath;
3543
3544         *NameArray = pNameArray;
3545
3546         *VolumeCB = pVolumeCB;
3547
3548         //
3549         // Increment our reference on the volume
3550         //
3551
3552         InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
3553
3554         AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
3555                       AFS_TRACE_LEVEL_VERBOSE,
3556                       "AFSParseName Increment2 count on global volume %08lX Cnt %d\n",
3557                       pVolumeCB,
3558                       pVolumeCB->VolumeReferenceCount);
3559
3560 try_exit:
3561
3562         if( NT_SUCCESS( ntStatus))
3563         {
3564
3565             if( *ParentDirectoryCB != NULL)
3566             {
3567
3568                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3569                               AFS_TRACE_LEVEL_VERBOSE,
3570                               "AFSParseName Count on %wZ DE %p Ccb %p Cnt %d\n",
3571                               &(*ParentDirectoryCB)->NameInformation.FileName,
3572                               *ParentDirectoryCB,
3573                               NULL,
3574                               (*ParentDirectoryCB)->OpenReferenceCount);
3575             }
3576         }
3577
3578         if( *VolumeCB != NULL)
3579         {
3580
3581             ASSERT( (*VolumeCB)->VolumeReferenceCount > 1);
3582         }
3583
3584         if( ntStatus != STATUS_SUCCESS)
3585         {
3586
3587             if( pNameArray != NULL)
3588             {
3589
3590                 AFSFreeNameArray( pNameArray);
3591             }
3592         }
3593     }
3594
3595     return ntStatus;
3596 }
3597
3598 NTSTATUS
3599 AFSCheckCellName( IN GUID *AuthGroup,
3600                   IN UNICODE_STRING *CellName,
3601                   OUT AFSDirectoryCB **ShareDirEntry)
3602 {
3603
3604     NTSTATUS ntStatus = STATUS_SUCCESS;
3605     UNICODE_STRING uniName;
3606     AFSFileID stFileID;
3607     AFSDirEnumEntry *pDirEnumEntry = NULL;
3608     AFSDeviceExt *pDevExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
3609     AFSDirHdr *pDirHdr = &AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr;
3610     AFSDirectoryCB *pDirNode = NULL;
3611     UNICODE_STRING uniDirName, uniTargetName;
3612     AFSVolumeCB *pVolumeCB = NULL;
3613
3614     __Enter
3615     {
3616
3617         //
3618         // Look for some default names we will not handle
3619         //
3620
3621         RtlInitUnicodeString( &uniName,
3622                               L"IPC$");
3623
3624         if( RtlCompareUnicodeString( &uniName,
3625                                      CellName,
3626                                      TRUE) == 0)
3627         {
3628
3629             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3630         }
3631
3632         RtlInitUnicodeString( &uniName,
3633                               L"wkssvc");
3634
3635         if( RtlCompareUnicodeString( &uniName,
3636                                      CellName,
3637                                      TRUE) == 0)
3638         {
3639
3640             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3641         }
3642
3643         RtlInitUnicodeString( &uniName,
3644                               L"srvsvc");
3645
3646         if( RtlCompareUnicodeString( &uniName,
3647                                      CellName,
3648                                      TRUE) == 0)
3649         {
3650
3651             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3652         }
3653
3654         RtlInitUnicodeString( &uniName,
3655                               L"PIPE");
3656
3657         if( RtlCompareUnicodeString( &uniName,
3658                                      CellName,
3659                                      TRUE) == 0)
3660         {
3661
3662             try_return( ntStatus = STATUS_NO_SUCH_FILE);
3663         }
3664
3665         //
3666         // OK, ask the CM about this component name
3667         //
3668
3669         stFileID = AFSGlobalRoot->ObjectInformation.FileId;
3670
3671         ntStatus = AFSEvaluateTargetByName( AuthGroup,
3672                                             &stFileID,
3673                                             CellName,
3674                                             &pDirEnumEntry);
3675
3676         if( !NT_SUCCESS( ntStatus))
3677         {
3678
3679             try_return( ntStatus);
3680         }
3681
3682         //
3683         // OK, we have a dir enum entry back so add it to the root node
3684         //
3685
3686         uniDirName = *CellName;
3687
3688         uniTargetName.Length = (USHORT)pDirEnumEntry->TargetNameLength;
3689         uniTargetName.MaximumLength = uniTargetName.Length;
3690         uniTargetName.Buffer = (WCHAR *)((char *)pDirEnumEntry + pDirEnumEntry->TargetNameOffset);
3691
3692         //
3693         // Is this entry a root volume entry?
3694         //
3695
3696         if( pDirEnumEntry->FileId.Cell != AFSGlobalRoot->ObjectInformation.FileId.Cell ||
3697             pDirEnumEntry->FileId.Volume != AFSGlobalRoot->ObjectInformation.FileId.Volume)
3698         {
3699
3700             //
3701             // We have the global root on entry so drop it now
3702             //
3703
3704             AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3705
3706             //
3707             // Build the root volume entry
3708             //
3709
3710             ntStatus = AFSBuildRootVolume( AuthGroup,
3711                                            &pDirEnumEntry->FileId,
3712                                            &pVolumeCB);
3713
3714             if( !NT_SUCCESS( ntStatus))
3715             {
3716
3717                 //
3718                 // On failure this routine is expecting to hold the global root
3719                 //
3720
3721                 AFSAcquireShared( AFSGlobalRoot->VolumeLock,
3722                                   TRUE);
3723
3724                 try_return( ntStatus);
3725             }
3726
3727             *ShareDirEntry = pVolumeCB->DirectoryCB;
3728
3729             InterlockedIncrement( &pVolumeCB->DirectoryCB->OpenReferenceCount);
3730
3731             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3732                           AFS_TRACE_LEVEL_VERBOSE,
3733                           "AFSCheckCellName Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
3734                           &pVolumeCB->DirectoryCB->NameInformation.FileName,
3735                           pVolumeCB->DirectoryCB,
3736                           NULL,
3737                           pVolumeCB->DirectoryCB->OpenReferenceCount);
3738
3739             InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
3740         }
3741         else
3742         {
3743
3744             pDirNode = AFSInitDirEntry( &AFSGlobalRoot->ObjectInformation,
3745                                         &uniDirName,
3746                                         &uniTargetName,
3747                                         pDirEnumEntry,
3748                                         (ULONG)InterlockedIncrement( &pDirHdr->ContentIndex));
3749
3750             if( pDirNode == NULL)
3751             {
3752
3753                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
3754             }
3755
3756             //
3757             // Init the short name if we have one
3758             //
3759
3760             if( pDirEnumEntry->ShortNameLength > 0)
3761             {
3762
3763                 pDirNode->NameInformation.ShortNameLength = pDirEnumEntry->ShortNameLength;
3764
3765                 RtlCopyMemory( pDirNode->NameInformation.ShortName,
3766                                pDirEnumEntry->ShortName,
3767                                pDirNode->NameInformation.ShortNameLength);
3768             }
3769
3770             AFSAcquireExcl( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock,
3771                             TRUE);
3772
3773             //
3774             // Insert the node into the name tree
3775             //
3776
3777             ASSERT( ExIsResourceAcquiredExclusiveLite( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock));
3778
3779             if( pDirHdr->CaseSensitiveTreeHead == NULL)
3780             {
3781
3782                 pDirHdr->CaseSensitiveTreeHead = pDirNode;
3783             }
3784             else
3785             {
3786
3787                 if( !NT_SUCCESS( AFSInsertCaseSensitiveDirEntry( pDirHdr->CaseSensitiveTreeHead,
3788                                                                  pDirNode)))
3789                 {
3790
3791                     AFSDeleteDirEntry( &AFSGlobalRoot->ObjectInformation,
3792                                        pDirNode);
3793
3794                     AFSReleaseResource( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock);
3795
3796                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
3797                 }
3798             }
3799
3800             ClearFlag( pDirNode->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE);
3801
3802             if( pDirHdr->CaseInsensitiveTreeHead == NULL)
3803             {
3804
3805                 pDirHdr->CaseInsensitiveTreeHead = pDirNode;
3806
3807                 SetFlag( pDirNode->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD);
3808             }
3809             else
3810             {
3811
3812                 AFSInsertCaseInsensitiveDirEntry( pDirHdr->CaseInsensitiveTreeHead,
3813                                                   pDirNode);
3814             }
3815
3816             if( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListHead == NULL)
3817             {
3818
3819                 AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListHead = pDirNode;
3820             }
3821             else
3822             {
3823
3824                 AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListTail->ListEntry.fLink = pDirNode;
3825
3826                 pDirNode->ListEntry.bLink = AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListTail;
3827             }
3828
3829             AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeListTail = pDirNode;
3830
3831             SetFlag( pDirNode->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
3832
3833             InterlockedIncrement( &AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeCount);
3834
3835             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
3836                           AFS_TRACE_LEVEL_VERBOSE,
3837                           "AFSCheckCellName Adding entry %wZ Inc Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
3838                               &pDirNode->NameInformation.FileName,
3839                               AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeCount,
3840                               AFSGlobalRoot->ObjectInformation.FileId.Cell,
3841                               AFSGlobalRoot->ObjectInformation.FileId.Volume,
3842                               AFSGlobalRoot->ObjectInformation.FileId.Vnode,
3843                               AFSGlobalRoot->ObjectInformation.FileId.Unique);
3844
3845             InterlockedIncrement( &pDirNode->OpenReferenceCount);
3846
3847             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
3848                           AFS_TRACE_LEVEL_VERBOSE,
3849                           "AFSCheckCellName Increment2 count on %wZ DE %p Ccb %p Cnt %d\n",
3850                           &pDirNode->NameInformation.FileName,
3851                           pDirNode,
3852                           NULL,
3853                           pDirNode->OpenReferenceCount);
3854
3855             AFSReleaseResource( AFSGlobalRoot->ObjectInformation.Specific.Directory.DirectoryNodeHdr.TreeLock);
3856
3857             //
3858             // Pass back the dir node
3859             //
3860
3861             *ShareDirEntry = pDirNode;
3862         }
3863
3864 try_exit:
3865
3866         if( pDirEnumEntry != NULL)
3867         {
3868
3869             AFSExFreePool( pDirEnumEntry);
3870         }
3871     }
3872
3873     return ntStatus;
3874 }
3875
3876 NTSTATUS
3877 AFSBuildMountPointTarget( IN GUID *AuthGroup,
3878                           IN AFSDirectoryCB  *DirectoryCB,
3879                           OUT AFSVolumeCB **TargetVolumeCB)
3880 {
3881
3882     NTSTATUS ntStatus = STATUS_SUCCESS;
3883     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
3884     AFSDirEnumEntry *pDirEntry = NULL;
3885     AFSDirectoryCB *pDirNode = NULL;
3886     UNICODE_STRING uniDirName, uniTargetName;
3887     ULONGLONG       ullIndex = 0;
3888     AFSVolumeCB *pVolumeCB = NULL;
3889     AFSFileID stTargetFileID;
3890
3891     __Enter
3892     {
3893
3894         //
3895         // Loop on each entry, building the chain until we encounter the final target
3896         //
3897
3898         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3899                       AFS_TRACE_LEVEL_VERBOSE_2,
3900                       "AFSBuildMountPointTarget Building target directory for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
3901                       &DirectoryCB->NameInformation.FileName,
3902                       DirectoryCB->ObjectInformation->FileId.Cell,
3903                       DirectoryCB->ObjectInformation->FileId.Volume,
3904                       DirectoryCB->ObjectInformation->FileId.Vnode,
3905                       DirectoryCB->ObjectInformation->FileId.Unique);
3906
3907         //
3908         // Do we need to evaluate the node?
3909         //
3910
3911         //if( DirectoryCB->ObjectInformation->TargetFileId.Vnode == 0 &&
3912         //    DirectoryCB->ObjectInformation->TargetFileId.Unique == 0)
3913         {
3914
3915             //
3916             // Go evaluate the current target to get the target fid
3917             //
3918
3919             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3920                           AFS_TRACE_LEVEL_VERBOSE_2,
3921                           "AFSBuildMountPointTarget Evaluating target %wZ FID %08lX-%08lX-%08lX-%08lX\n",
3922                               &DirectoryCB->NameInformation.FileName,
3923                               DirectoryCB->ObjectInformation->FileId.Cell,
3924                               DirectoryCB->ObjectInformation->FileId.Volume,
3925                               DirectoryCB->ObjectInformation->FileId.Vnode,
3926                               DirectoryCB->ObjectInformation->FileId.Unique);
3927
3928             ntStatus = AFSEvaluateTargetByID( DirectoryCB->ObjectInformation,
3929                                               AuthGroup,
3930                                               FALSE,
3931                                               &pDirEntry);
3932
3933             if( !NT_SUCCESS( ntStatus))
3934             {
3935
3936                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3937                               AFS_TRACE_LEVEL_ERROR,
3938                               "AFSBuildMountPointTarget Failed to evaluate target %wZ Status %08lX\n",
3939                               &DirectoryCB->NameInformation.FileName,
3940                               ntStatus);
3941                 try_return( ntStatus);
3942             }
3943
3944             if( pDirEntry->TargetFileId.Vnode == 0 &&
3945                 pDirEntry->TargetFileId.Unique == 0)
3946             {
3947
3948                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3949                               AFS_TRACE_LEVEL_ERROR,
3950                               "AFSBuildMountPointTarget Target %wZ FID %08lX-%08lX-%08lX-%08lX service returned zero FID\n",
3951                               &DirectoryCB->NameInformation.FileName,
3952                               DirectoryCB->ObjectInformation->FileId.Cell,
3953                               DirectoryCB->ObjectInformation->FileId.Volume,
3954                               DirectoryCB->ObjectInformation->FileId.Vnode,
3955                               DirectoryCB->ObjectInformation->FileId.Unique);
3956
3957                 try_return( ntStatus = STATUS_ACCESS_DENIED);
3958             }
3959
3960             AFSAcquireExcl( &DirectoryCB->NonPaged->Lock,
3961                             TRUE);
3962
3963             ntStatus = AFSUpdateTargetName( &DirectoryCB->NameInformation.TargetName,
3964                                             &DirectoryCB->Flags,
3965                                             (WCHAR *)((char *)pDirEntry + pDirEntry->TargetNameOffset),
3966                                             (USHORT)pDirEntry->TargetNameLength);
3967
3968             if( !NT_SUCCESS( ntStatus))
3969             {
3970
3971                 AFSReleaseResource( &DirectoryCB->NonPaged->Lock);
3972
3973                 try_return( ntStatus);
3974             }
3975
3976             AFSReleaseResource( &DirectoryCB->NonPaged->Lock);
3977
3978             DirectoryCB->ObjectInformation->TargetFileId = pDirEntry->TargetFileId;
3979         }
3980
3981         stTargetFileID = DirectoryCB->ObjectInformation->TargetFileId;
3982
3983         //
3984         // Try to locate this FID. First the volume then the
3985         // entry itself
3986         //
3987
3988         ullIndex = AFSCreateHighIndex( &stTargetFileID);
3989
3990         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
3991                       AFS_TRACE_LEVEL_VERBOSE,
3992                       "AFSBuildMountPointTarget Acquiring RDR VolumeTreeLock lock %08lX EXCL %08lX\n",
3993                       &pDevExt->Specific.RDR.VolumeTreeLock,
3994                       PsGetCurrentThread());
3995
3996         AFSAcquireShared( &pDevExt->Specific.RDR.VolumeTreeLock,
3997                           TRUE);
3998
3999         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4000                       AFS_TRACE_LEVEL_VERBOSE_2,
4001                       "AFSBuildMountPointTarget Locating volume for target %I64X\n",
4002                       ullIndex);
4003
4004         ntStatus = AFSLocateHashEntry( pDevExt->Specific.RDR.VolumeTree.TreeHead,
4005                                        ullIndex,
4006                                        (AFSBTreeEntry **)&pVolumeCB);
4007
4008         //
4009         // We can be processing a request for a target that is on a volume
4010         // we have never seen before.
4011         //
4012
4013         if( pVolumeCB == NULL)
4014         {
4015
4016             //
4017             // Locking is held correctly in init routine
4018             //
4019
4020             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
4021
4022             //
4023             // Go init the root of the volume
4024             //
4025
4026             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4027                           AFS_TRACE_LEVEL_VERBOSE_2,
4028                           "AFSBuildMountPointTarget Initializing root for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
4029                           &DirectoryCB->NameInformation.FileName,
4030                           DirectoryCB->ObjectInformation->FileId.Cell,
4031                           DirectoryCB->ObjectInformation->FileId.Volume,
4032                           DirectoryCB->ObjectInformation->FileId.Vnode,
4033                           DirectoryCB->ObjectInformation->FileId.Unique);
4034
4035             ntStatus = AFSInitVolume( AuthGroup,
4036                                       &stTargetFileID,
4037                                       &pVolumeCB);
4038
4039             if( !NT_SUCCESS( ntStatus))
4040             {
4041
4042                 try_return( ntStatus);
4043             }
4044         }
4045         else
4046         {
4047
4048             //
4049             // Check if this volume has been deleted or taken offline
4050             //
4051
4052             if( BooleanFlagOn( pVolumeCB->Flags, AFS_VOLUME_FLAGS_OFFLINE))
4053             {
4054
4055                 AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
4056
4057                 try_return( ntStatus = STATUS_FILE_IS_OFFLINE);
4058             }
4059
4060             //
4061             // Just to ensure that things don't get torn down AND we don't create a
4062             // deadlock with invalidation
4063             //
4064
4065             InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
4066
4067             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
4068
4069             AFSAcquireExcl( pVolumeCB->VolumeLock,
4070                             TRUE);
4071
4072             InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
4073         }
4074
4075         if( pVolumeCB->RootFcb == NULL)
4076         {
4077
4078             //
4079             // Initialize the root fcb for this volume
4080             //
4081
4082             ntStatus = AFSInitRootFcb( (ULONGLONG)PsGetCurrentProcessId(),
4083                                        pVolumeCB);
4084
4085             if( !NT_SUCCESS( ntStatus))
4086             {
4087
4088                 AFSReleaseResource( pVolumeCB->VolumeLock);
4089
4090                 try_return( ntStatus);
4091             }
4092
4093             //
4094             // Drop the lock acquired above
4095             //
4096
4097             AFSReleaseResource( &pVolumeCB->RootFcb->NPFcb->Resource);
4098         }
4099
4100         AFSConvertToShared( pVolumeCB->VolumeLock);
4101
4102         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4103                       AFS_TRACE_LEVEL_VERBOSE_2,
4104                       "AFSBuildMountPointTarget Evaluated target of %wZ FID %08lX-%08lX-%08lX-%08lX as root volume\n",
4105                       &pVolumeCB->DirectoryCB->NameInformation.FileName,
4106                       pVolumeCB->ObjectInformation.FileId.Cell,
4107                       pVolumeCB->ObjectInformation.FileId.Volume,
4108                       pVolumeCB->ObjectInformation.FileId.Vnode,
4109                       pVolumeCB->ObjectInformation.FileId.Unique);
4110
4111         InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
4112
4113         AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
4114                       AFS_TRACE_LEVEL_VERBOSE,
4115                       "AFSBuildMountPointTarget Increment count on volume %08lX Cnt %d\n",
4116                       pVolumeCB,
4117                       pVolumeCB->VolumeReferenceCount);
4118
4119         *TargetVolumeCB = pVolumeCB;
4120
4121 try_exit:
4122
4123         if( pDirEntry)
4124         {
4125
4126             AFSExFreePool( pDirEntry);
4127         }
4128     }
4129
4130     return ntStatus;
4131 }
4132
4133 NTSTATUS
4134 AFSBuildRootVolume( IN GUID *AuthGroup,
4135                     IN AFSFileID *FileId,
4136                     OUT AFSVolumeCB **TargetVolumeCB)
4137 {
4138
4139     NTSTATUS ntStatus = STATUS_SUCCESS;
4140     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
4141     AFSDirectoryCB *pDirNode = NULL;
4142     UNICODE_STRING uniDirName, uniTargetName;
4143     ULONGLONG       ullIndex = 0;
4144     AFSVolumeCB *pVolumeCB = NULL;
4145
4146     __Enter
4147     {
4148
4149         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4150                       AFS_TRACE_LEVEL_VERBOSE_2,
4151                       "AFSBuildRootVolume Building target volume for FID %08lX-%08lX-%08lX-%08lX\n",
4152                       FileId->Cell,
4153                       FileId->Volume,
4154                       FileId->Vnode,
4155                       FileId->Unique);
4156
4157         ullIndex = AFSCreateHighIndex( FileId);
4158
4159         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
4160                       AFS_TRACE_LEVEL_VERBOSE,
4161                       "AFSBuildRootVolume Acquiring RDR VolumeTreeLock lock %08lX EXCL %08lX\n",
4162                       &pDevExt->Specific.RDR.VolumeTreeLock,
4163                       PsGetCurrentThread());
4164
4165         AFSAcquireShared( &pDevExt->Specific.RDR.VolumeTreeLock,
4166                           TRUE);
4167
4168         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4169                       AFS_TRACE_LEVEL_VERBOSE_2,
4170                       "AFSBuildRootVolume Locating volume for target %I64X\n",
4171                       ullIndex);
4172
4173         ntStatus = AFSLocateHashEntry( pDevExt->Specific.RDR.VolumeTree.TreeHead,
4174                                        ullIndex,
4175                                        (AFSBTreeEntry **)&pVolumeCB);
4176
4177         //
4178         // We can be processing a request for a target that is on a volume
4179         // we have never seen before.
4180         //
4181
4182         if( pVolumeCB == NULL)
4183         {
4184
4185             //
4186             // Locking is held correctly in init routine
4187             //
4188
4189             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
4190
4191             //
4192             // Go init the root of the volume
4193             //
4194
4195             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4196                           AFS_TRACE_LEVEL_VERBOSE_2,
4197                           "AFSBuildRootVolume Initializing root for FID %08lX-%08lX-%08lX-%08lX\n",
4198                           FileId->Cell,
4199                           FileId->Volume,
4200                           FileId->Vnode,
4201                           FileId->Unique);
4202
4203             ntStatus = AFSInitVolume( AuthGroup,
4204                                       FileId,
4205                                       &pVolumeCB);
4206
4207             if( !NT_SUCCESS( ntStatus))
4208             {
4209
4210                 try_return( ntStatus);
4211             }
4212         }
4213         else
4214         {
4215
4216             //
4217             // Just to ensure that things don't get torn down AND we don't create a
4218             // deadlock with invalidation
4219             //
4220
4221             InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
4222
4223             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
4224
4225             AFSAcquireExcl( pVolumeCB->VolumeLock,
4226                             TRUE);
4227
4228             InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
4229         }
4230
4231
4232         if( pVolumeCB->RootFcb == NULL)
4233         {
4234
4235             //
4236             // Initialize the root fcb for this volume
4237             //
4238
4239             ntStatus = AFSInitRootFcb( (ULONGLONG)PsGetCurrentProcessId(),
4240                                        pVolumeCB);
4241
4242             if( !NT_SUCCESS( ntStatus))
4243             {
4244
4245                 AFSReleaseResource( pVolumeCB->VolumeLock);
4246
4247                 try_return( ntStatus);
4248             }
4249
4250             //
4251             // Drop the lock acquired above
4252             //
4253
4254             AFSReleaseResource( &pVolumeCB->RootFcb->NPFcb->Resource);
4255         }
4256
4257         AFSConvertToShared( pVolumeCB->VolumeLock);
4258
4259         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4260                       AFS_TRACE_LEVEL_VERBOSE_2,
4261                       "AFSBuildRootVolume Evaluated target of %wZ FID %08lX-%08lX-%08lX-%08lX as root volume\n",
4262                       &pVolumeCB->DirectoryCB->NameInformation.FileName,
4263                       pVolumeCB->ObjectInformation.FileId.Cell,
4264                       pVolumeCB->ObjectInformation.FileId.Volume,
4265                       pVolumeCB->ObjectInformation.FileId.Vnode,
4266                       pVolumeCB->ObjectInformation.FileId.Unique);
4267
4268         InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
4269
4270         AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
4271                       AFS_TRACE_LEVEL_VERBOSE,
4272                       "AFSBuildRootVolume Increment count on volume %08lX Cnt %d\n",
4273                       pVolumeCB,
4274                       pVolumeCB->VolumeReferenceCount);
4275
4276         *TargetVolumeCB = pVolumeCB;
4277
4278 try_exit:
4279
4280         NOTHING;
4281     }
4282
4283     return ntStatus;
4284 }
4285
4286 NTSTATUS
4287 AFSProcessDFSLink( IN AFSDirectoryCB *DirEntry,
4288                    IN PFILE_OBJECT FileObject,
4289                    IN UNICODE_STRING *RemainingPath)
4290 {
4291
4292     NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;
4293     UNICODE_STRING uniReparseName;
4294     UNICODE_STRING uniMUPDeviceName;
4295     AFSDirEnumEntry *pDirEntry = NULL;
4296     GUID *pAuthGroup = NULL;
4297
4298     __Enter
4299     {
4300
4301         //
4302         // Build up the name to reparse
4303         //
4304
4305         RtlInitUnicodeString( &uniMUPDeviceName,
4306                               L"\\Device\\MUP");
4307
4308         uniReparseName.Length = 0;
4309         uniReparseName.Buffer = NULL;
4310
4311         //
4312         // Be sure we have a target name
4313         //
4314
4315         if( DirEntry->NameInformation.TargetName.Length == 0)
4316         {
4317
4318             if( DirEntry->ObjectInformation->Fcb != NULL)
4319             {
4320                 pAuthGroup = &DirEntry->ObjectInformation->Fcb->AuthGroup;
4321             }
4322
4323             ntStatus = AFSEvaluateTargetByID( DirEntry->ObjectInformation,
4324                                               pAuthGroup,
4325                                               FALSE,
4326                                               &pDirEntry);
4327
4328             if( !NT_SUCCESS( ntStatus) ||
4329                 pDirEntry->TargetNameLength == 0)
4330             {
4331
4332                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4333                               AFS_TRACE_LEVEL_ERROR,
4334                               "AFSProcessDFSLink EvaluateTargetByID failed for Fcb %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
4335                               &DirEntry->NameInformation.FileName,
4336                               DirEntry->ObjectInformation->FileId.Cell,
4337                               DirEntry->ObjectInformation->FileId.Volume,
4338                               DirEntry->ObjectInformation->FileId.Vnode,
4339                               DirEntry->ObjectInformation->FileId.Unique,
4340                               ntStatus);
4341
4342                 if( NT_SUCCESS( ntStatus))
4343                 {
4344
4345                     ntStatus = STATUS_ACCESS_DENIED;
4346                 }
4347
4348                 try_return( ntStatus);
4349             }
4350
4351             //
4352             // Update the target name
4353             //
4354
4355             AFSAcquireExcl( &DirEntry->NonPaged->Lock,
4356                             TRUE);
4357
4358             ntStatus = AFSUpdateTargetName( &DirEntry->NameInformation.TargetName,
4359                                             &DirEntry->Flags,
4360                                             (WCHAR *)((char *)pDirEntry + pDirEntry->TargetNameOffset),
4361                                             (USHORT)pDirEntry->TargetNameLength);
4362
4363             if( !NT_SUCCESS( ntStatus))
4364             {
4365
4366                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4367                               AFS_TRACE_LEVEL_ERROR,
4368                               "AFSProcessDFSLink UpdateTargetName failed for Fcb %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
4369                               &DirEntry->NameInformation.FileName,
4370                               DirEntry->ObjectInformation->FileId.Cell,
4371                               DirEntry->ObjectInformation->FileId.Volume,
4372                               DirEntry->ObjectInformation->FileId.Vnode,
4373                               DirEntry->ObjectInformation->FileId.Unique,
4374                               ntStatus);
4375
4376                 AFSReleaseResource( &DirEntry->NonPaged->Lock);
4377
4378                 try_return( ntStatus);
4379             }
4380
4381             AFSConvertToShared( &DirEntry->NonPaged->Lock);
4382         }
4383         else
4384         {
4385             AFSAcquireShared( &DirEntry->NonPaged->Lock,
4386                               TRUE);
4387         }
4388
4389         uniReparseName.MaximumLength = uniMUPDeviceName.Length +
4390                                                    sizeof( WCHAR) +
4391                                                    DirEntry->NameInformation.TargetName.Length +
4392                                                    sizeof( WCHAR);
4393
4394         if( RemainingPath != NULL &&
4395             RemainingPath->Length > 0)
4396         {
4397
4398             uniReparseName.MaximumLength += RemainingPath->Length;
4399         }
4400
4401         //
4402         // Allocate the reparse buffer
4403         //
4404
4405         uniReparseName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
4406                                                                    uniReparseName.MaximumLength,
4407                                                                    AFS_REPARSE_NAME_TAG);
4408
4409         if( uniReparseName.Buffer == NULL)
4410         {
4411
4412             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4413                           AFS_TRACE_LEVEL_ERROR,
4414                           "AFSProcessDFSLink uniReparseName.Buffer == NULL Fcb %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
4415                           &DirEntry->NameInformation.FileName,
4416                           DirEntry->ObjectInformation->FileId.Cell,
4417                           DirEntry->ObjectInformation->FileId.Volume,
4418                           DirEntry->ObjectInformation->FileId.Vnode,
4419                           DirEntry->ObjectInformation->FileId.Unique,
4420                           STATUS_INSUFFICIENT_RESOURCES);
4421
4422             AFSReleaseResource( &DirEntry->NonPaged->Lock);
4423
4424             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
4425         }
4426
4427         //
4428         // Start building the name
4429         //
4430
4431         RtlCopyMemory( uniReparseName.Buffer,
4432                        uniMUPDeviceName.Buffer,
4433                        uniMUPDeviceName.Length);
4434
4435         uniReparseName.Length = uniMUPDeviceName.Length;
4436
4437         if( DirEntry->NameInformation.TargetName.Buffer[ 0] != L'\\')
4438         {
4439
4440             uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)] = L'\\';
4441
4442             uniReparseName.Length += sizeof( WCHAR);
4443         }
4444
4445         RtlCopyMemory( &uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)],
4446                        DirEntry->NameInformation.TargetName.Buffer,
4447                        DirEntry->NameInformation.TargetName.Length);
4448
4449         uniReparseName.Length += DirEntry->NameInformation.TargetName.Length;
4450
4451         AFSReleaseResource( &DirEntry->NonPaged->Lock);
4452
4453         if( RemainingPath != NULL &&
4454             RemainingPath->Length > 0)
4455         {
4456
4457             if( uniReparseName.Buffer[ (uniReparseName.Length/sizeof( WCHAR)) - 1] != L'\\' &&
4458                 RemainingPath->Buffer[ 0] != L'\\')
4459             {
4460
4461                 uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)] = L'\\';
4462
4463                 uniReparseName.Length += sizeof( WCHAR);
4464             }
4465
4466             RtlCopyMemory( &uniReparseName.Buffer[ uniReparseName.Length/sizeof( WCHAR)],
4467                            RemainingPath->Buffer,
4468                            RemainingPath->Length);
4469
4470             uniReparseName.Length += RemainingPath->Length;
4471         }
4472
4473         //
4474         // Update the name in the file object
4475         //
4476
4477         if( FileObject->FileName.Buffer != NULL)
4478         {
4479
4480             AFSExFreePool( FileObject->FileName.Buffer);
4481         }
4482
4483         FileObject->FileName = uniReparseName;
4484
4485         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
4486                       AFS_TRACE_LEVEL_VERBOSE,
4487                       "AFSProcessDFSLink Reparsing access to Fcb %wZ FID %08lX-%08lX-%08lX-%08lX to %wZ\n",
4488                       &DirEntry->NameInformation.FileName,
4489                       DirEntry->ObjectInformation->FileId.Cell,
4490                       DirEntry->ObjectInformation->FileId.Volume,
4491                       DirEntry->ObjectInformation->FileId.Vnode,
4492                       DirEntry->ObjectInformation->FileId.Unique,
4493                       &uniReparseName);
4494
4495         //
4496         // Return status reparse ...
4497         //
4498
4499         ntStatus = STATUS_REPARSE;
4500
4501 try_exit:
4502
4503         if ( pDirEntry)
4504         {
4505
4506             AFSExFreePool( pDirEntry);
4507         }
4508     }
4509
4510     return ntStatus;
4511 }