Windows: New Trace for DirEntry tracking problem
[openafs.git] / 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.
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33  */
34
35 //
36 // File: AFSNameSupport.cpp
37 //
38
39 #include "AFSCommon.h"
40
41 NTSTATUS
42 AFSLocateNameEntry( IN GUID *AuthGroup,
43                     IN PFILE_OBJECT FileObject,
44                     IN UNICODE_STRING *RootPathName,
45                     IN UNICODE_STRING *ParsedPathName,
46                     IN AFSNameArrayHdr *NameArray,
47                     IN ULONG Flags,
48                     OUT AFSVolumeCB **VolumeCB,
49                     IN OUT AFSDirectoryCB **ParentDirectoryCB,
50                     OUT AFSDirectoryCB **DirectoryCB,
51                     OUT PUNICODE_STRING ComponentName)
52 {
53
54     NTSTATUS          ntStatus = STATUS_SUCCESS;
55     UNICODE_STRING    uniPathName, uniComponentName, uniRemainingPath, uniSearchName, uniFullPathName;
56     ULONG             ulCRC = 0;
57     AFSDirectoryCB   *pDirEntry = NULL, *pParentDirEntry = NULL;
58     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
59     UNICODE_STRING    uniSysName;
60     ULONG             ulSubstituteIndex = 0;
61     BOOLEAN           bSubstituteName = FALSE;
62     AFSNameArrayHdr  *pNameArray = NameArray;
63     BOOLEAN           bAllocatedSymLinkBuffer = FALSE;
64     UNICODE_STRING    uniRelativeName, uniNoOpName;
65     AFSObjectInfoCB  *pCurrentObject = NULL;
66     AFSVolumeCB      *pCurrentVolume = *VolumeCB;
67     BOOLEAN           bReleaseCurrentVolume = TRUE;
68     BOOLEAN           bSubstitutedName = FALSE;
69
70     __Enter
71     {
72
73         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
74                       AFS_TRACE_LEVEL_VERBOSE_2,
75                       "AFSLocateNameEntry (FO: %08lX) Processing full name %wZ\n",
76                       FileObject,
77                       RootPathName);
78
79         RtlInitUnicodeString( &uniSysName,
80                               L"*@SYS");
81
82         RtlInitUnicodeString( &uniRelativeName,
83                               L"..");
84
85         RtlInitUnicodeString( &uniNoOpName,
86                               L".");
87
88         //
89         // Cleanup some parameters
90         //
91
92         if( ComponentName != NULL)
93         {
94
95             ComponentName->Length = 0;
96             ComponentName->MaximumLength = 0;
97             ComponentName->Buffer = NULL;
98         }
99
100         //
101         // We will parse through the filename, locating the directory nodes until we encounter a cache miss
102         // Starting at the root node
103         //
104
105         pParentDirEntry = NULL;
106
107         pDirEntry = *ParentDirectoryCB;
108
109         uniPathName = *ParsedPathName;
110
111         uniFullPathName = *RootPathName;
112
113         uniComponentName.Length = uniComponentName.MaximumLength = 0;
114         uniComponentName.Buffer = NULL;
115
116         uniRemainingPath.Length = uniRemainingPath.MaximumLength = 0;
117         uniRemainingPath.Buffer = NULL;
118
119         uniSearchName.Length = uniSearchName.MaximumLength = 0;
120         uniSearchName.Buffer = NULL;
121
122         ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
123
124         while( TRUE)
125         {
126
127             //
128             // Check our total link count for this name array
129             //
130
131             if( pNameArray->LinkCount >= (LONG)pDevExt->Specific.RDR.MaxLinkCount)
132             {
133
134                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
135             }
136
137             pCurrentObject = pDirEntry->ObjectInformation;
138
139             KeQueryTickCount( &pCurrentObject->LastAccessCount);
140
141             //
142             // Check that the directory entry is not deleted or pending delete
143             //
144
145             if( BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_DELETED))
146             {
147
148                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
149                               AFS_TRACE_LEVEL_ERROR,
150                               "AFSLocateNameEntry (FO: %08lX) Deleted parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
151                               FileObject,
152                               &pDirEntry->NameInformation.FileName,
153                               pCurrentObject->FileId.Cell,
154                               pCurrentObject->FileId.Volume,
155                               pCurrentObject->FileId.Vnode,
156                               pCurrentObject->FileId.Unique,
157                               ntStatus);
158
159                 try_return( ntStatus = STATUS_FILE_DELETED);
160             }
161
162             if( BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_PENDING_DELETE))
163             {
164
165                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
166                               AFS_TRACE_LEVEL_ERROR,
167                               "AFSLocateNameEntry (FO: %08lX) Delete pending on %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
168                               FileObject,
169                               &pDirEntry->NameInformation.FileName,
170                               pCurrentObject->FileId.Cell,
171                               pCurrentObject->FileId.Volume,
172                               pCurrentObject->FileId.Vnode,
173                               pCurrentObject->FileId.Unique,
174                               ntStatus);
175
176                 try_return( ntStatus = STATUS_DELETE_PENDING);
177             }
178
179             //
180             // Check if the directory requires verification
181             //
182
183             if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_VERIFY) &&
184                 ( pCurrentObject->FileType != AFS_FILE_TYPE_DIRECTORY ||
185                   !AFSIsEnumerationInProcess( pCurrentObject)))
186             {
187
188                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
189                               AFS_TRACE_LEVEL_VERBOSE,
190                               "AFSLocateNameEntry (FO: %08lX) Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
191                               FileObject,
192                               &pDirEntry->NameInformation.FileName,
193                               pCurrentObject->FileId.Cell,
194                               pCurrentObject->FileId.Volume,
195                               pCurrentObject->FileId.Vnode,
196                               pCurrentObject->FileId.Unique);
197
198                 ntStatus = AFSVerifyEntry( AuthGroup,
199                                            pDirEntry);
200
201                 if( !NT_SUCCESS( ntStatus))
202                 {
203
204                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
205                                   AFS_TRACE_LEVEL_ERROR,
206                                   "AFSLocateNameEntry (FO: %08lX) Failed to verify parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
207                                   FileObject,
208                                   &pDirEntry->NameInformation.FileName,
209                                   pCurrentObject->FileId.Cell,
210                                   pCurrentObject->FileId.Volume,
211                                   pCurrentObject->FileId.Vnode,
212                                   pCurrentObject->FileId.Unique,
213                                   ntStatus);
214
215                     try_return( ntStatus);
216                 }
217             }
218
219             //
220             // Ensure the parent node has been evaluated, if not then go do it now
221             //
222
223             if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_NOT_EVALUATED) ||
224                 pCurrentObject->FileType == AFS_FILE_TYPE_UNKNOWN)
225             {
226
227                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
228                               AFS_TRACE_LEVEL_VERBOSE,
229                               "AFSLocateNameEntry (FO: %08lX) Evaluating parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
230                               FileObject,
231                               &pDirEntry->NameInformation.FileName,
232                               pCurrentObject->FileId.Cell,
233                               pCurrentObject->FileId.Volume,
234                               pCurrentObject->FileId.Vnode,
235                               pCurrentObject->FileId.Unique);
236
237                 ntStatus = AFSEvaluateNode( AuthGroup,
238                                             pDirEntry);
239
240                 if( !NT_SUCCESS( ntStatus))
241                 {
242
243                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
244                                   AFS_TRACE_LEVEL_ERROR,
245                                   "AFSLocateNameEntry (FO: %08lX) Failed to evaluate parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
246                                   FileObject,
247                                   &pDirEntry->NameInformation.FileName,
248                                   pCurrentObject->FileId.Cell,
249                                   pCurrentObject->FileId.Volume,
250                                   pCurrentObject->FileId.Vnode,
251                                   pCurrentObject->FileId.Unique,
252                                   ntStatus);
253
254                     try_return( ntStatus);
255                 }
256
257                 ClearFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_NOT_EVALUATED);
258             }
259
260             //
261             // If this is a mount point or symlink then go get the real directory node
262             //
263
264             switch( pCurrentObject->FileType)
265             {
266
267                 case AFS_FILE_TYPE_SYMLINK:
268                 {
269
270                     UNICODE_STRING uniTempName;
271                     WCHAR *pTmpBuffer = NULL;
272                     LONG lLinkCount = 0;
273
274                     //
275                     // Check if the flag is set to NOT evaluate a symlink
276                     // and we are done with the parsing
277                     //
278
279                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_SL_TARGET_EVAL) &&
280                         uniRemainingPath.Length == 0)
281                     {
282
283                         //
284                         // Pass back the directory entries
285                         //
286
287                         *ParentDirectoryCB = pParentDirEntry;
288
289                         *DirectoryCB = pDirEntry;
290
291                         *VolumeCB = pCurrentVolume;
292
293                         *RootPathName = uniFullPathName;
294
295                         try_return( ntStatus);
296                     }
297
298                     AFSAcquireExcl( &pDirEntry->NonPaged->Lock,
299                                     TRUE);
300
301                     if( pDirEntry->NameInformation.TargetName.Length == 0)
302                     {
303
304                         //
305                         // We'll reset the DV to ensure we validate the metadata content
306                         //
307
308                         pCurrentObject->DataVersion.QuadPart = (ULONGLONG)-1;
309
310                         SetFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_VERIFY);
311
312                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
313                                       AFS_TRACE_LEVEL_VERBOSE,
314                                       "AFSLocateNameEntry (FO: %08lX) Verifying symlink parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
315                                       FileObject,
316                                       &pDirEntry->NameInformation.FileName,
317                                       pCurrentObject->FileId.Cell,
318                                       pCurrentObject->FileId.Volume,
319                                       pCurrentObject->FileId.Vnode,
320                                       pCurrentObject->FileId.Unique);
321
322                         ntStatus = AFSVerifyEntry( AuthGroup,
323                                                    pDirEntry);
324
325                         if( !NT_SUCCESS( ntStatus))
326                         {
327
328                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
329                                           AFS_TRACE_LEVEL_ERROR,
330                                           "AFSLocateNameEntry (FO: %08lX) Failed to verify symlink parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
331                                           FileObject,
332                                           &pDirEntry->NameInformation.FileName,
333                                           pCurrentObject->FileId.Cell,
334                                           pCurrentObject->FileId.Volume,
335                                           pCurrentObject->FileId.Vnode,
336                                           pCurrentObject->FileId.Unique,
337                                           ntStatus);
338
339                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
340
341                             try_return( ntStatus);
342                         }
343
344                         //
345                         // If the type changed then reprocess this entry
346                         //
347
348                         if( pCurrentObject->FileType != AFS_FILE_TYPE_SYMLINK)
349                         {
350
351                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
352
353                             continue;
354                         }
355                     }
356
357                     //
358                     // If we were given a zero length target name then deny access to the entry
359                     //
360
361                     if( pDirEntry->NameInformation.TargetName.Length == 0)
362                     {
363
364                         ntStatus = STATUS_ACCESS_DENIED;
365
366                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
367                                       AFS_TRACE_LEVEL_ERROR,
368                                       "AFSLocateNameEntry (FO: %08lX) Failed to retrieve target name for symlink %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
369                                       FileObject,
370                                       &pDirEntry->NameInformation.FileName,
371                                       pCurrentObject->FileId.Cell,
372                                       pCurrentObject->FileId.Volume,
373                                       pCurrentObject->FileId.Vnode,
374                                       pCurrentObject->FileId.Unique,
375                                       ntStatus);
376
377                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
378
379                         try_return( ntStatus);
380                     }
381
382                     if( AFSIsRelativeName( &pDirEntry->NameInformation.TargetName))
383                     {
384
385                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
386                                       AFS_TRACE_LEVEL_VERBOSE,
387                                       "AFSLocateNameEntry (FO: %08lX) Processing relative symlink target %wZ for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
388                                       FileObject,
389                                       &pDirEntry->NameInformation.TargetName,
390                                       &pDirEntry->NameInformation.FileName,
391                                       pCurrentObject->FileId.Cell,
392                                       pCurrentObject->FileId.Volume,
393                                       pCurrentObject->FileId.Vnode,
394                                       pCurrentObject->FileId.Unique);
395
396                         //
397                         // We'll substitute this name into the current process name
398                         // starting at where we sit in the path
399                         //
400
401                         uniTempName.Length = 0;
402                         uniTempName.MaximumLength = (USHORT)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer) +
403                                                                     pDirEntry->NameInformation.TargetName.Length +
404                                                                     sizeof( WCHAR) +
405                                                                     uniRemainingPath.Length;
406
407                         uniTempName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
408                                                                                 uniTempName.MaximumLength,
409                                                                                 AFS_NAME_BUFFER_ONE_TAG);
410
411                         if( uniTempName.Buffer == NULL)
412                         {
413
414                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
415
416                             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
417                         }
418
419                         //
420                         // We have so first copy in the portion up to the component
421                         // name
422                         //
423
424                         RtlCopyMemory( uniTempName.Buffer,
425                                        uniFullPathName.Buffer,
426                                        (ULONG)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer));
427
428                         uniTempName.Length = (USHORT)((char *)uniComponentName.Buffer - (char *)uniFullPathName.Buffer);
429
430                         if( bAllocatedSymLinkBuffer ||
431                             bSubstitutedName)
432                         {
433
434                             pTmpBuffer = uniFullPathName.Buffer;
435                         }
436
437                         bAllocatedSymLinkBuffer = TRUE;
438
439                         //
440                         // Have we parsed this name yet? Better have at least once ...
441                         //
442
443                         if( uniComponentName.Length == 0)
444                         {
445                             ASSERT( FALSE);
446                         }
447
448                         //
449                         // Copy in the target name ...
450                         //
451
452                         RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
453                                        pDirEntry->NameInformation.TargetName.Buffer,
454                                        pDirEntry->NameInformation.TargetName.Length);
455
456                         uniPathName.Buffer = &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)];
457
458                         uniPathName.Length += pDirEntry->NameInformation.TargetName.Length;
459                         uniPathName.MaximumLength = uniTempName.MaximumLength;
460
461                         uniTempName.Length += pDirEntry->NameInformation.TargetName.Length;
462
463                         //
464                         // And now any remaining portion of the name
465                         //
466
467                         if( uniRemainingPath.Length > 0)
468                         {
469
470                             if( uniRemainingPath.Buffer[ 0] != L'\\')
471                             {
472
473                                 uniRemainingPath.Buffer--;
474                                 uniRemainingPath.Length += sizeof( WCHAR);
475
476                                 uniPathName.Length += sizeof( WCHAR);
477                             }
478
479                             RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
480                                            uniRemainingPath.Buffer,
481                                            uniRemainingPath.Length);
482
483                             uniTempName.Length += uniRemainingPath.Length;
484                         }
485
486                         uniFullPathName = uniTempName;
487
488                         if( pTmpBuffer != NULL)
489                         {
490
491                             AFSExFreePool( pTmpBuffer);
492                         }
493
494                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
495
496                         //
497                         // Dereference the current entry ..
498                         //
499
500                         InterlockedDecrement( &pDirEntry->OpenReferenceCount);
501
502                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
503                                       AFS_TRACE_LEVEL_VERBOSE,
504                                       "AFSLocateNameEntry Decrement1 count on %wZ DE %p Ccb %p Cnt %d\n",
505                                       &pDirEntry->NameInformation.FileName,
506                                       pDirEntry,
507                                       NULL,
508                                       pDirEntry->OpenReferenceCount);
509
510                         //
511                         // OK, need to back up one entry for the correct parent since the current
512                         // entry we are on is the symlink itself
513                         //
514
515                         pDirEntry = AFSBackupEntry( pNameArray);
516
517                         //
518                         // Increment our reference on this dir entry
519                         //
520
521                         InterlockedIncrement( &pDirEntry->OpenReferenceCount);
522
523                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
524                                       AFS_TRACE_LEVEL_VERBOSE,
525                                       "AFSLocateNameEntry Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
526                                       &pDirEntry->NameInformation.FileName,
527                                       pDirEntry,
528                                       NULL,
529                                       pDirEntry->OpenReferenceCount);
530
531                         if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_ROOT_VOLUME))
532                         {
533
534                             pParentDirEntry = NULL;
535                         }
536                         else
537                         {
538
539                             pParentDirEntry = AFSGetParentEntry( pNameArray);
540
541                             ASSERT( pParentDirEntry != pDirEntry);
542                         }
543                     }
544                     else
545                     {
546
547                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
548                                       AFS_TRACE_LEVEL_VERBOSE,
549                                       "AFSLocateNameEntry (FO: %08lX) Processing absolute symlink target %wZ for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
550                                       FileObject,
551                                       &pDirEntry->NameInformation.TargetName,
552                                       &pDirEntry->NameInformation.FileName,
553                                       pCurrentObject->FileId.Cell,
554                                       pCurrentObject->FileId.Volume,
555                                       pCurrentObject->FileId.Vnode,
556                                       pCurrentObject->FileId.Unique);
557
558                         //
559                         // We'll substitute this name into the current process name
560                         // starting at where we sit in the path
561                         //
562
563                         uniTempName.Length = 0;
564                         uniTempName.MaximumLength = pDirEntry->NameInformation.TargetName.Length +
565                                                                     sizeof( WCHAR) +
566                                                                     uniRemainingPath.Length;
567
568                         uniTempName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
569                                                                                 uniTempName.MaximumLength,
570                                                                                 AFS_NAME_BUFFER_TWO_TAG);
571
572                         if( uniTempName.Buffer == NULL)
573                         {
574
575                             AFSReleaseResource( &pDirEntry->NonPaged->Lock);
576
577                             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
578                         }
579
580                         if( bAllocatedSymLinkBuffer ||
581                             bSubstitutedName)
582                         {
583
584                             pTmpBuffer = uniFullPathName.Buffer;
585                         }
586
587                         bAllocatedSymLinkBuffer = TRUE;
588
589                         //
590                         // Have we parsed this name yet? Better have at least once ...
591                         //
592
593                         if( uniComponentName.Length == 0)
594                         {
595                             ASSERT( FALSE);
596                         }
597
598                         //
599                         // Copy in the target name ...
600                         //
601
602                         RtlCopyMemory( uniTempName.Buffer,
603                                        pDirEntry->NameInformation.TargetName.Buffer,
604                                        pDirEntry->NameInformation.TargetName.Length);
605
606                         uniTempName.Length = pDirEntry->NameInformation.TargetName.Length;
607
608                         //
609                         // And now any remaining portion of the name
610                         //
611
612                         if( uniRemainingPath.Length > 0)
613                         {
614
615                             if( uniRemainingPath.Buffer[ 0] != L'\\')
616                             {
617
618                                 uniRemainingPath.Buffer--;
619                                 uniRemainingPath.Length += sizeof( WCHAR);
620                             }
621
622                             RtlCopyMemory( &uniTempName.Buffer[ uniTempName.Length/sizeof( WCHAR)],
623                                            uniRemainingPath.Buffer,
624                                            uniRemainingPath.Length);
625
626                             uniTempName.Length += uniRemainingPath.Length;
627                         }
628
629                         uniFullPathName = uniTempName;
630
631                         uniPathName = uniTempName;
632
633                         if( pTmpBuffer != NULL)
634                         {
635
636                             AFSExFreePool( pTmpBuffer);
637                         }
638
639                         AFSReleaseResource( &pDirEntry->NonPaged->Lock);
640
641                         //
642                         // If our current volume is not the global root then make it so ...
643                         //
644
645                         if( pCurrentVolume != AFSGlobalRoot)
646                         {
647
648                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
649                                           AFS_TRACE_LEVEL_VERBOSE,
650                                           "AFSLocateNameEntry (FO: %08lX) Current volume not global, resetting for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
651                                           FileObject,
652                                           &pDirEntry->NameInformation.FileName,
653                                           pCurrentObject->FileId.Cell,
654                                           pCurrentObject->FileId.Volume,
655                                           pCurrentObject->FileId.Vnode,
656                                           pCurrentObject->FileId.Unique);
657
658                             InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
659
660                             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
661                                           AFS_TRACE_LEVEL_VERBOSE,
662                                           "AFSLocateNameEntry Decrement count on volume %08lX Cnt %d\n",
663                                           pCurrentVolume,
664                                           pCurrentVolume->VolumeReferenceCount);
665
666                             AFSReleaseResource( pCurrentVolume->VolumeLock);
667
668                             pCurrentVolume = AFSGlobalRoot;
669
670                             AFSAcquireShared( pCurrentVolume->VolumeLock,
671                                               TRUE);
672
673                             InterlockedIncrement( &pCurrentVolume->VolumeReferenceCount);
674
675                             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
676                                           AFS_TRACE_LEVEL_VERBOSE,
677                                           "AFSLocateNameEntry Increment count on volume %08lX Cnt %d\n",
678                                           pCurrentVolume,
679                                           pCurrentVolume->VolumeReferenceCount);
680                         }
681
682                         //
683                         // Dereference our current dir entry
684                         //
685
686                         InterlockedDecrement( &pDirEntry->OpenReferenceCount);
687
688                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
689                                       AFS_TRACE_LEVEL_VERBOSE,
690                                       "AFSLocateNameEntry Decrement2 count on %wZ DE %p Ccb %p Cnt %d\n",
691                                       &pDirEntry->NameInformation.FileName,
692                                       pDirEntry,
693                                       NULL,
694                                       pDirEntry->OpenReferenceCount);
695
696                         pDirEntry = pCurrentVolume->DirectoryCB;
697
698                         //
699                         // Reference the new dir entry
700                         //
701
702                         InterlockedIncrement( &pDirEntry->OpenReferenceCount);
703
704                         AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
705                                       AFS_TRACE_LEVEL_VERBOSE,
706                                       "AFSLocateNameEntry Increment2 count on %wZ DE %p Ccb %p Cnt %d\n",
707                                       &pDirEntry->NameInformation.FileName,
708                                       pDirEntry,
709                                       NULL,
710                                       pDirEntry->OpenReferenceCount);
711
712                         //
713                         // Reset the name array
714                         // Persist the link count in the name array
715                         //
716
717                         lLinkCount = pNameArray->LinkCount;
718
719                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
720                                       AFS_TRACE_LEVEL_VERBOSE,
721                                       "AFSLocateNameEntry (FO: %08lX) Resetting name array for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
722                                       FileObject,
723                                       &pDirEntry->NameInformation.FileName,
724                                       pCurrentObject->FileId.Cell,
725                                       pCurrentObject->FileId.Volume,
726                                       pCurrentObject->FileId.Vnode,
727                                       pCurrentObject->FileId.Unique);
728
729                         AFSResetNameArray( pNameArray,
730                                            pDirEntry);
731
732                         pNameArray->LinkCount = lLinkCount;
733
734                         //
735                         // Process over the \\<Global root> portion of the name
736                         //
737
738                         FsRtlDissectName( uniPathName,
739                                           &uniComponentName,
740                                           &uniRemainingPath);
741
742                         if( RtlCompareUnicodeString( &uniComponentName,
743                                                      &AFSServerName,
744                                                      TRUE) != 0)
745                         {
746
747                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
748                                           AFS_TRACE_LEVEL_ERROR,
749                                           "AFSLocateNameEntry Name %wZ contains invalid server name\n",
750                                           &uniPathName);
751
752                             //
753                             // The correct response would be STATUS_OBJECT_PATH_INVALID
754                             // but that prevents cmd.exe from performing a recursive
755                             // directory enumeration when opening a directory entry
756                             // that represents a symlink to an invalid path is discovered.
757                             //
758                             try_return( ntStatus = STATUS_OBJECT_PATH_NOT_FOUND);
759                         }
760
761                         uniPathName = uniRemainingPath;
762
763                         pParentDirEntry = NULL;
764                     }
765
766                     //
767                     // Increment our link count
768                     //
769
770                     InterlockedIncrement( &pNameArray->LinkCount);
771
772                     continue;
773                 }
774
775                 case AFS_FILE_TYPE_MOUNTPOINT:
776                 {
777
778                     //
779                     // Check if the flag is set to NOT evaluate a mount point
780                     // and we are done with the parsing
781                     //
782
783                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_MP_TARGET_EVAL) &&
784                         uniRemainingPath.Length == 0)
785                     {
786
787                         //
788                         // Pass back the directory entries
789                         //
790
791                         *ParentDirectoryCB = pParentDirEntry;
792
793                         *DirectoryCB = pDirEntry;
794
795                         *VolumeCB = pCurrentVolume;
796
797                         *RootPathName = uniFullPathName;
798
799                         try_return( ntStatus);
800                     }
801
802                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
803                                   AFS_TRACE_LEVEL_VERBOSE,
804                                   "AFSLocateNameEntry (FO: %08lX) Building MP target for parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
805                                   FileObject,
806                                   &pDirEntry->NameInformation.FileName,
807                                   pCurrentObject->FileId.Cell,
808                                   pCurrentObject->FileId.Volume,
809                                   pCurrentObject->FileId.Vnode,
810                                   pCurrentObject->FileId.Unique);
811
812                     //
813                     // Go retrieve the target entry for this node
814                     // Release the current volume cb entry since we would
815                     // have lock inversion in the following call
816                     // Also decrement the ref count on the volume
817                     //
818
819                     ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
820
821                     InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
822
823                     AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
824                                   AFS_TRACE_LEVEL_VERBOSE,
825                                   "AFSLocateNameEntry Decrement2 count on volume %08lX Cnt %d\n",
826                                   pCurrentVolume,
827                                   pCurrentVolume->VolumeReferenceCount);
828
829                     AFSReleaseResource( pCurrentVolume->VolumeLock);
830
831                     ntStatus = AFSBuildMountPointTarget( AuthGroup,
832                                                          pDirEntry,
833                                                          &pCurrentVolume);
834
835                     if( !NT_SUCCESS( ntStatus))
836                     {
837
838                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
839                                       AFS_TRACE_LEVEL_ERROR,
840                                       "AFSLocateNameEntry (FO: %08lX) Failed to build MP target for parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
841                                       FileObject,
842                                       &pDirEntry->NameInformation.FileName,
843                                       pCurrentObject->FileId.Cell,
844                                       pCurrentObject->FileId.Volume,
845                                       pCurrentObject->FileId.Vnode,
846                                       pCurrentObject->FileId.Unique,
847                                       ntStatus);
848
849                         //
850                         // We already decremented the current volume above
851                         //
852
853                         bReleaseCurrentVolume = FALSE;
854
855                         try_return( ntStatus = STATUS_ACCESS_DENIED);
856                     }
857
858                     ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
859
860                     ASSERT( ExIsResourceAcquiredLite( pCurrentVolume->VolumeLock));
861
862                     //
863                     // Replace the current name for the mp with the volume root of the target
864                     //
865
866                     AFSReplaceCurrentElement( pNameArray,
867                                               pCurrentVolume->DirectoryCB);
868
869                     //
870                     // We want to restart processing here on the new parent ...
871                     // Deref and ref count the entries
872                     //
873
874                     InterlockedDecrement( &pDirEntry->OpenReferenceCount);
875
876                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
877                                   AFS_TRACE_LEVEL_VERBOSE,
878                                   "AFSLocateNameEntry Decrement3 count on %wZ DE %p Ccb %p Cnt %d\n",
879                                   &pDirEntry->NameInformation.FileName,
880                                   pDirEntry,
881                                   NULL,
882                                   pDirEntry->OpenReferenceCount);
883
884                     pDirEntry = pCurrentVolume->DirectoryCB;
885
886                     InterlockedIncrement( &pDirEntry->OpenReferenceCount);
887
888                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
889                                   AFS_TRACE_LEVEL_VERBOSE,
890                                   "AFSLocateNameEntry Increment3 count on %wZ DE %p Ccb %p Cnt %d\n",
891                                   &pDirEntry->NameInformation.FileName,
892                                   pDirEntry,
893                                   NULL,
894                                   pDirEntry->OpenReferenceCount);
895
896                     pParentDirEntry = NULL;
897
898                     //
899                     // Increment our link count
900                     //
901
902                     InterlockedIncrement( &pNameArray->LinkCount);
903
904                     continue;
905                 }
906
907                 case AFS_FILE_TYPE_DFSLINK:
908                 {
909
910                     if( BooleanFlagOn( Flags, AFS_LOCATE_FLAGS_NO_DFS_LINK_EVAL))
911                     {
912
913                         //
914                         // Pass back the directory entries
915                         //
916
917                         *ParentDirectoryCB = pParentDirEntry;
918
919                         *DirectoryCB = pDirEntry;
920
921                         *VolumeCB = pCurrentVolume;
922
923                         *RootPathName = uniFullPathName;
924
925                         try_return( ntStatus);
926                     }
927
928                     //
929                     // This is a DFS link so we need to update the file name and return STATUS_REPARSE to the
930                     // system for it to reevaluate it
931                     //
932
933                     if( FileObject != NULL)
934                     {
935
936                         ntStatus = AFSProcessDFSLink( pDirEntry,
937                                                       FileObject,
938                                                       &uniRemainingPath);
939                     }
940                     else
941                     {
942
943                         //
944                         // This is where we have been re-entered from an NP evaluation call via the BuildBranch()
945                         // routine.
946                         //
947
948                         ntStatus = STATUS_INVALID_PARAMETER;
949                     }
950
951                     if( ntStatus != STATUS_SUCCESS &&
952                         ntStatus != STATUS_REPARSE)
953                     {
954
955                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
956                                       AFS_TRACE_LEVEL_ERROR,
957                                       "AFSLocateNameEntry (FO: %08lX) Failed to process DFSLink parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
958                                       FileObject,
959                                       &pDirEntry->NameInformation.FileName,
960                                       pCurrentObject->FileId.Cell,
961                                       pCurrentObject->FileId.Volume,
962                                       pCurrentObject->FileId.Vnode,
963                                       pCurrentObject->FileId.Unique,
964                                       ntStatus);
965                     }
966
967                     try_return( ntStatus);
968                 }
969
970                 case AFS_FILE_TYPE_UNKNOWN:
971                 case AFS_FILE_TYPE_INVALID:
972                 {
973
974                     //
975                     // Something was not processed ...
976                     //
977
978                     try_return( ntStatus = STATUS_ACCESS_DENIED);
979                 }
980
981             }   /* end of switch */
982
983             //
984             // If the parent is not initialized then do it now
985             //
986
987             if( pCurrentObject->FileType == AFS_FILE_TYPE_DIRECTORY &&
988                 !BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
989             {
990
991                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
992                               AFS_TRACE_LEVEL_VERBOSE,
993                               "AFSLocateNameEntry (FO: %08lX) Enumerating parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
994                               FileObject,
995                               &pDirEntry->NameInformation.FileName,
996                               pCurrentObject->FileId.Cell,
997                               pCurrentObject->FileId.Volume,
998                               pCurrentObject->FileId.Vnode,
999                               pCurrentObject->FileId.Unique);
1000
1001                 AFSAcquireExcl( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock,
1002                                 TRUE);
1003
1004                 if( !BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
1005                 {
1006
1007                     ntStatus = AFSEnumerateDirectory( AuthGroup,
1008                                                       pCurrentObject,
1009                                                       TRUE);
1010
1011                     if( !NT_SUCCESS( ntStatus))
1012                     {
1013
1014                         AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1015
1016                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1017                                       AFS_TRACE_LEVEL_ERROR,
1018                                       "AFSLocateNameEntry (FO: %08lX) Failed to enumerate parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1019                                       FileObject,
1020                                       &pDirEntry->NameInformation.FileName,
1021                                       pCurrentObject->FileId.Cell,
1022                                       pCurrentObject->FileId.Volume,
1023                                       pCurrentObject->FileId.Vnode,
1024                                       pCurrentObject->FileId.Unique,
1025                                       ntStatus);
1026
1027                         try_return( ntStatus);
1028                     }
1029
1030                     SetFlag( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED);
1031                 }
1032
1033                 AFSReleaseResource( pCurrentObject->Specific.Directory.DirectoryNodeHdr.TreeLock);
1034             }
1035             else if( pCurrentObject->FileType == AFS_FILE_TYPE_FILE)
1036             {
1037
1038                 if( uniPathName.Length > 0)
1039                 {
1040
1041                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1042                                   AFS_TRACE_LEVEL_ERROR,
1043                                   "AFSLocateNameEntry (FO: %08lX) Encountered file node %wZ FID %08lX-%08lX-%08lX-%08lX in path processing\n",
1044                                   FileObject,
1045                                   &pDirEntry->NameInformation.FileName,
1046                                   pCurrentObject->FileId.Cell,
1047                                   pCurrentObject->FileId.Volume,
1048                                   pCurrentObject->FileId.Vnode,
1049                                   pCurrentObject->FileId.Unique);
1050
1051                     // The proper error code to return would be STATUS_OBJECT_PATH_INVALID because
1052                     // one of the components of the path is not a directory.  However, returning
1053                     // that error prevents IIS 7 and 7.5 from being able to serve data out of AFS.
1054                     // Instead IIS insists on treating the target file as if it is a directory containing
1055                     // a potential web.config file.  NTFS and LanMan return STATUS_OBJECT_PATH_NOT_FOUND.
1056                     // AFS will follow suit.
1057
1058                     ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1059                 }
1060                 else
1061                 {
1062
1063                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1064                                   AFS_TRACE_LEVEL_VERBOSE,
1065                                   "AFSLocateNameEntry (FO: %08lX) Returning file %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1066                                   FileObject,
1067                                   &pDirEntry->NameInformation.FileName,
1068                                   pCurrentObject->FileId.Cell,
1069                                   pCurrentObject->FileId.Volume,
1070                                   pCurrentObject->FileId.Vnode,
1071                                   pCurrentObject->FileId.Unique);
1072
1073                     //
1074                     // Pass back the directory entries
1075                     //
1076
1077                     *ParentDirectoryCB = pParentDirEntry;
1078
1079                     *DirectoryCB = pDirEntry;
1080
1081                     *VolumeCB = pCurrentVolume;
1082
1083                     *RootPathName = uniFullPathName;
1084                 }
1085
1086                 try_return( ntStatus);
1087             }
1088
1089             //
1090             // If we are at the end of the processing, set our returned information and get out
1091             //
1092
1093             if( uniPathName.Length == 0)
1094             {
1095
1096                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1097                               AFS_TRACE_LEVEL_VERBOSE,
1098                               "AFSLocateNameEntry (FO: %08lX) Completed processing returning %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1099                               FileObject,
1100                               &pDirEntry->NameInformation.FileName,
1101                               pCurrentObject->FileId.Cell,
1102                               pCurrentObject->FileId.Volume,
1103                               pCurrentObject->FileId.Vnode,
1104                               pCurrentObject->FileId.Unique);
1105
1106                 //
1107                 // Pass back the directory entries
1108                 //
1109
1110                 *ParentDirectoryCB = pParentDirEntry;
1111
1112                 *DirectoryCB = pDirEntry;
1113
1114                 *VolumeCB = pCurrentVolume;
1115
1116                 *RootPathName = uniFullPathName;
1117
1118                 try_return( ntStatus);
1119             }
1120
1121             //
1122             // We may have returned to the top of the while( TRUE)
1123             //
1124             if( bSubstituteName &&
1125                 uniSearchName.Buffer != NULL)
1126             {
1127
1128                 AFSExFreePool( uniSearchName.Buffer);
1129
1130                 bSubstituteName = FALSE;
1131
1132                 uniSearchName.Length = uniSearchName.MaximumLength = 0;
1133                 uniSearchName.Buffer = NULL;
1134             }
1135
1136             ulSubstituteIndex = 1;
1137
1138             ntStatus = STATUS_SUCCESS;
1139
1140             //
1141             // Get the next component name
1142             //
1143
1144             FsRtlDissectName( uniPathName,
1145                               &uniComponentName,
1146                               &uniRemainingPath);
1147
1148             //
1149             // Check for the . and .. in the path
1150             //
1151
1152             if( RtlCompareUnicodeString( &uniComponentName,
1153                                          &uniNoOpName,
1154                                          TRUE) == 0)
1155             {
1156
1157                 uniPathName = uniRemainingPath;
1158
1159                 continue;
1160             }
1161
1162             if( RtlCompareUnicodeString( &uniComponentName,
1163                                          &uniRelativeName,
1164                                          TRUE) == 0)
1165             {
1166
1167                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1168                               AFS_TRACE_LEVEL_VERBOSE,
1169                               "AFSLocateNameEntry (FO: %08lX) Backing up entry from %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1170                               FileObject,
1171                               &pDirEntry->NameInformation.FileName,
1172                               pCurrentObject->FileId.Cell,
1173                               pCurrentObject->FileId.Volume,
1174                               pCurrentObject->FileId.Vnode,
1175                               pCurrentObject->FileId.Unique);
1176
1177                 //
1178                 // Need to back up one entry in the name array
1179                 //
1180
1181                 InterlockedDecrement( &pDirEntry->OpenReferenceCount);
1182
1183                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1184                               AFS_TRACE_LEVEL_VERBOSE,
1185                               "AFSLocateNameEntry Decrement4 count on %wZ DE %p Ccb %p Cnt %d\n",
1186                               &pDirEntry->NameInformation.FileName,
1187                               pDirEntry,
1188                               NULL,
1189                               pDirEntry->OpenReferenceCount);
1190
1191                 pDirEntry = AFSBackupEntry( NameArray);
1192
1193                 if( pDirEntry == NULL)
1194                 {
1195
1196                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1197                                   AFS_TRACE_LEVEL_ERROR,
1198                                   "AFSLocateNameEntry AFSBackupEntry failed\n");
1199
1200                     try_return(ntStatus = STATUS_OBJECT_PATH_INVALID);
1201                 }
1202
1203                 InterlockedIncrement( &pDirEntry->OpenReferenceCount);
1204
1205                 if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_ROOT_VOLUME))
1206                 {
1207
1208                     pParentDirEntry = NULL;
1209                 }
1210                 else
1211                 {
1212
1213                     pParentDirEntry = AFSGetParentEntry( pNameArray);
1214
1215                     ASSERT( pParentDirEntry != pDirEntry);
1216                 }
1217
1218                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1219                               AFS_TRACE_LEVEL_VERBOSE,
1220                               "AFSLocateNameEntry Increment4 count on %wZ DE %p Ccb %p Cnt %d\n",
1221                               &pDirEntry->NameInformation.FileName,
1222                               pDirEntry,
1223                               NULL,
1224                               pDirEntry->OpenReferenceCount);
1225
1226                 uniPathName = uniRemainingPath;
1227
1228                 continue;
1229             }
1230
1231             //
1232             // Update our pointers
1233             //
1234
1235             pParentDirEntry = pDirEntry;
1236
1237             pDirEntry = NULL;
1238
1239             uniSearchName = uniComponentName;
1240
1241             while( pDirEntry == NULL)
1242             {
1243
1244                 //
1245                 // If the SearchName contains @SYS then we perform the substitution.
1246                 // If there is no substitution we give up.
1247                 //
1248
1249                 if( !bSubstituteName &&
1250                     FsRtlIsNameInExpression( &uniSysName,
1251                                              &uniSearchName,
1252                                              TRUE,
1253                                              NULL))
1254                 {
1255
1256                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1257                                   AFS_TRACE_LEVEL_VERBOSE_2,
1258                                   "AFSLocateNameEntry (FO: %08lX) Processing @SYS substitution for %wZ Index %08lX\n",
1259                                   FileObject,
1260                                   &uniComponentName,
1261                                   ulSubstituteIndex);
1262
1263                     ntStatus = AFSSubstituteSysName( &uniComponentName,
1264                                                      &uniSearchName,
1265                                                      ulSubstituteIndex);
1266
1267                     if ( NT_SUCCESS( ntStatus))
1268                     {
1269
1270                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1271                                       AFS_TRACE_LEVEL_VERBOSE_2,
1272                                       "AFSLocateNameEntry (FO: %08lX) Located substitution %wZ for %wZ Index %08lX\n",
1273                                       FileObject,
1274                                       &uniSearchName,
1275                                       &uniComponentName,
1276                                       ulSubstituteIndex);
1277
1278                         //
1279                         // Go reparse the name again
1280                         //
1281
1282                         bSubstituteName = TRUE;
1283
1284                         ulSubstituteIndex++; // For the next entry, if needed
1285
1286                         continue;   // while( pDirEntry == NULL)
1287                     }
1288                     else
1289                     {
1290
1291                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1292                                       AFS_TRACE_LEVEL_ERROR,
1293                                       "AFSLocateNameEntry (FO: %08lX) Failed to locate substitute string for %wZ Index %08lX Status %08lX\n",
1294                                       FileObject,
1295                                       &uniComponentName,
1296                                       ulSubstituteIndex,
1297                                       ntStatus);
1298
1299                         if( ntStatus == STATUS_OBJECT_NAME_NOT_FOUND)
1300                         {
1301
1302                             //
1303                             // Pass back the directory entries
1304                             //
1305
1306                             *ParentDirectoryCB = pParentDirEntry;
1307
1308                             *DirectoryCB = NULL;
1309
1310                             *VolumeCB = pCurrentVolume;
1311
1312                             if( ComponentName != NULL)
1313                             {
1314
1315                                 *ComponentName = uniComponentName;
1316                             }
1317
1318                             *RootPathName = uniFullPathName;
1319                         }
1320
1321                         //
1322                         // We can't possibly have a pDirEntry since the lookup failed
1323                         //
1324                         try_return( ntStatus);
1325                     }
1326                 }
1327
1328                 //
1329                 // Generate the CRC on the node and perform a case sensitive lookup
1330                 //
1331
1332                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1333                               AFS_TRACE_LEVEL_VERBOSE_2,
1334                               "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ case sensitive\n",
1335                               FileObject,
1336                               &uniSearchName);
1337
1338                 ulCRC = AFSGenerateCRC( &uniSearchName,
1339                                         FALSE);
1340
1341                 AFSAcquireShared( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
1342                                   TRUE);
1343
1344                 AFSLocateCaseSensitiveDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
1345                                                 ulCRC,
1346                                                 &pDirEntry);
1347
1348                 if( pDirEntry == NULL)
1349                 {
1350
1351                     //
1352                     // Missed so perform a case insensitive lookup
1353                     //
1354
1355                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1356                                   AFS_TRACE_LEVEL_VERBOSE_2,
1357                                   "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ case insensitive\n",
1358                                   FileObject,
1359                                   &uniSearchName);
1360
1361                     ulCRC = AFSGenerateCRC( &uniSearchName,
1362                                             TRUE);
1363
1364                     AFSLocateCaseInsensitiveDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
1365                                                       ulCRC,
1366                                                       &pDirEntry);
1367
1368                     if( pDirEntry == NULL)
1369                     {
1370
1371                         //
1372                         // OK, if this component is a valid short name then try
1373                         // a lookup in the short name tree
1374                         //
1375
1376                         if( RtlIsNameLegalDOS8Dot3( &uniSearchName,
1377                                                     NULL,
1378                                                     NULL))
1379                         {
1380
1381                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1382                                           AFS_TRACE_LEVEL_VERBOSE_2,
1383                                           "AFSLocateNameEntry (FO: %08lX) Searching for entry %wZ short name\n",
1384                                           FileObject,
1385                                           &uniSearchName);
1386
1387                             AFSLocateShortNameDirEntry( pParentDirEntry->ObjectInformation->Specific.Directory.ShortNameTree,
1388                                                         ulCRC,
1389                                                         &pDirEntry);
1390                         }
1391
1392                         if( pDirEntry == NULL)
1393                         {
1394
1395                             //
1396                             // If we substituted a name then reset our search name and try again
1397                             //
1398
1399                             if( bSubstituteName)
1400                             {
1401
1402                                 AFSExFreePool( uniSearchName.Buffer);
1403
1404                                 uniSearchName = uniComponentName;
1405
1406                                 bSubstituteName = FALSE;
1407
1408                                 AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1409
1410                                 continue;       // while( pDirEntry == NULL)
1411                             }
1412
1413                             if( uniRemainingPath.Length > 0)
1414                             {
1415
1416                                 ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1417                             }
1418                             else
1419                             {
1420
1421                                 ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
1422
1423                                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1424                                               AFS_TRACE_LEVEL_VERBOSE,
1425                                               "AFSLocateNameEntry (FO: %08lX) Returning name not found for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1426                                               FileObject,
1427                                               &uniSearchName,
1428                                               pCurrentObject->FileId.Cell,
1429                                               pCurrentObject->FileId.Volume,
1430                                               pCurrentObject->FileId.Vnode,
1431                                               pCurrentObject->FileId.Unique);
1432
1433                                 //
1434                                 // Pass back the directory entries
1435                                 //
1436
1437                                 *ParentDirectoryCB = pParentDirEntry;
1438
1439                                 *DirectoryCB = NULL;
1440
1441                                 *VolumeCB = pCurrentVolume;
1442
1443                                 if( ComponentName != NULL)
1444                                 {
1445
1446                                     *ComponentName = uniComponentName;
1447                                 }
1448
1449                                 *RootPathName = uniFullPathName;
1450                             }
1451
1452                             AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1453
1454                             //
1455                             // Node name not found so get out
1456                             //
1457
1458                             try_return( ntStatus);  // while( pDirEntry == NULL)
1459                         }
1460                     }
1461                     else
1462                     {
1463
1464                         //
1465                         // Here we have a match on the case insensitive lookup for the name. If there
1466                         // Is more than one link entry for this node then fail the lookup request
1467                         //
1468
1469                         if( !BooleanFlagOn( pDirEntry->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD) ||
1470                             pDirEntry->CaseInsensitiveList.fLink != NULL)
1471                         {
1472
1473                             AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1474
1475                             try_return(ntStatus = STATUS_OBJECT_NAME_COLLISION);
1476                         }
1477                     }
1478                 }
1479
1480                 if( pDirEntry != NULL)
1481                 {
1482
1483                     //
1484                     // If the verify flag is set on the parent and the current entry is deleted
1485                     // revalidate the parent and search again.
1486                     //
1487
1488                     if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED) &&
1489                         BooleanFlagOn( pParentDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY))
1490                     {
1491
1492                         AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1493
1494                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1495                                       AFS_TRACE_LEVEL_VERBOSE,
1496                                       "AFSLocateNameEntry (FO: %08lX) Verifying(2) parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1497                                       FileObject,
1498                                       &pParentDirEntry->NameInformation.FileName,
1499                                       pParentDirEntry->ObjectInformation->FileId.Cell,
1500                                       pParentDirEntry->ObjectInformation->FileId.Volume,
1501                                       pParentDirEntry->ObjectInformation->FileId.Vnode,
1502                                       pParentDirEntry->ObjectInformation->FileId.Unique);
1503
1504                         ntStatus = AFSVerifyEntry( AuthGroup,
1505                                                    pParentDirEntry);
1506
1507                         if( !NT_SUCCESS( ntStatus))
1508                         {
1509
1510                             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1511                                           AFS_TRACE_LEVEL_ERROR,
1512                                           "AFSLocateNameEntry (FO: %08lX) Failed to verify(2) parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1513                                           FileObject,
1514                                           &pParentDirEntry->NameInformation.FileName,
1515                                           pParentDirEntry->ObjectInformation->FileId.Cell,
1516                                           pParentDirEntry->ObjectInformation->FileId.Volume,
1517                                           pParentDirEntry->ObjectInformation->FileId.Vnode,
1518                                           pParentDirEntry->ObjectInformation->FileId.Unique,
1519                                           ntStatus);
1520
1521                             try_return( ntStatus);
1522                         }
1523
1524                         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1525                                       AFS_TRACE_LEVEL_VERBOSE,
1526                                       "AFSLocateNameEntry (FO: %08lX) Reprocessing component %wZ in parent %wZ\n",
1527                                       FileObject,
1528                                       &uniSearchName,
1529                                       &pParentDirEntry->NameInformation.FileName);
1530
1531
1532                         pDirEntry = NULL;
1533
1534                         continue;
1535                     }
1536
1537                     //
1538                     // Increment our dir entry ref count
1539                     //
1540
1541                     InterlockedIncrement( &pDirEntry->OpenReferenceCount);
1542
1543                     AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1544                                   AFS_TRACE_LEVEL_VERBOSE,
1545                                   "AFSLocateNameEntry Increment5 count on %wZ DE %p Ccb %p Cnt %d\n",
1546                                   &pDirEntry->NameInformation.FileName,
1547                                   pDirEntry,
1548                                   NULL,
1549                                   pDirEntry->OpenReferenceCount);
1550                 }
1551
1552                 AFSReleaseResource( pParentDirEntry->ObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1553
1554             } // End while( pDirEntry == NULL)
1555
1556             //
1557             // If we have a dirEntry for this component, perform some basic validation on it
1558             //
1559
1560             if( pDirEntry != NULL &&
1561                 BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_DELETED))
1562             {
1563
1564                 pCurrentObject = pDirEntry->ObjectInformation;
1565
1566                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1567                               AFS_TRACE_LEVEL_ERROR,
1568                               "AFSLocateNameEntry (FO: %08lX) Deleted parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1569                               FileObject,
1570                               &pDirEntry->NameInformation.FileName,
1571                               pCurrentObject->FileId.Cell,
1572                               pCurrentObject->FileId.Volume,
1573                               pCurrentObject->FileId.Vnode,
1574                               pCurrentObject->FileId.Unique);
1575
1576                 //
1577                 // This entry was deleted through the invalidation call back so perform cleanup
1578                 // on the entry
1579                 //
1580
1581                 ASSERT( pCurrentObject->ParentObjectInformation != NULL);
1582
1583                 AFSAcquireExcl( pCurrentObject->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock,
1584                                 TRUE);
1585
1586                 AFSAcquireExcl( pCurrentObject->VolumeCB->ObjectInfoTree.TreeLock,
1587                                 TRUE);
1588
1589                 if( InterlockedDecrement( &pDirEntry->OpenReferenceCount) == 0)
1590                 {
1591
1592                     AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1593                                   AFS_TRACE_LEVEL_VERBOSE,
1594                                   "AFSLocateNameEntry Deleting dir entry %08lX (%08lX) for %wZ\n",
1595                                   pDirEntry,
1596                                   pCurrentObject,
1597                                   &pDirEntry->NameInformation.FileName);
1598
1599                     //
1600                     // Remove and delete the directory entry from the parent list
1601                     //
1602
1603                     AFSDeleteDirEntry( pCurrentObject->ParentObjectInformation,
1604                                        pDirEntry);
1605
1606                     if( pCurrentObject->ObjectReferenceCount == 0)
1607                     {
1608
1609                         if( BooleanFlagOn( pCurrentObject->Flags, AFS_OBJECT_INSERTED_HASH_TREE))
1610                         {
1611
1612                             AFSDbgLogMsg( AFS_SUBSYSTEM_CLEANUP_PROCESSING,
1613                                           AFS_TRACE_LEVEL_VERBOSE,
1614                                           "AFSLocateNameEntry Removing object %08lX from volume tree\n",
1615                                           pCurrentObject);
1616
1617                             AFSRemoveHashEntry( &pCurrentObject->VolumeCB->ObjectInfoTree.TreeHead,
1618                                                 &pCurrentObject->TreeEntry);
1619
1620                             ClearFlag( pCurrentObject->Flags, AFS_OBJECT_INSERTED_HASH_TREE);
1621                         }
1622                     }
1623                 }
1624                 else
1625                 {
1626
1627                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1628                                   AFS_TRACE_LEVEL_VERBOSE,
1629                                   "AFSLocateNameEntry Setting DELETE flag in dir entry %p for %wZ\n",
1630                                   pDirEntry,
1631                                   &pDirEntry->NameInformation.FileName);
1632
1633                     SetFlag( pDirEntry->Flags, AFS_DIR_ENTRY_DELETED);
1634
1635                     AFSRemoveNameEntry( pCurrentObject->ParentObjectInformation,
1636                                         pDirEntry);
1637                 }
1638
1639                 AFSReleaseResource( pCurrentObject->ParentObjectInformation->Specific.Directory.DirectoryNodeHdr.TreeLock);
1640
1641                 AFSReleaseResource( pCurrentObject->VolumeCB->ObjectInfoTree.TreeLock);
1642
1643                 //
1644                 // We deleted the dir entry so check if there is any remaining portion
1645                 // of the name to process.
1646                 //
1647
1648                 if( uniRemainingPath.Length > 0)
1649                 {
1650                     ntStatus = STATUS_OBJECT_PATH_NOT_FOUND;
1651                 }
1652                 else
1653                 {
1654
1655                     ntStatus = STATUS_OBJECT_NAME_NOT_FOUND;
1656
1657                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1658                                   AFS_TRACE_LEVEL_VERBOSE,
1659                                   "AFSLocateNameEntry (FO: %08lX) Returning name not found(2) for %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1660                                   FileObject,
1661                                   &uniComponentName,
1662                                   pCurrentObject->FileId.Cell,
1663                                   pCurrentObject->FileId.Volume,
1664                                   pCurrentObject->FileId.Vnode,
1665                                   pCurrentObject->FileId.Unique);
1666
1667                     //
1668                     // Pass back the directory entries
1669                     //
1670
1671                     *ParentDirectoryCB = pParentDirEntry;
1672
1673                     *DirectoryCB = NULL;
1674
1675                     *VolumeCB = pCurrentVolume;
1676
1677                     if( ComponentName != NULL)
1678                     {
1679
1680                         *ComponentName = uniComponentName;
1681                     }
1682
1683                     *RootPathName = uniFullPathName;
1684                 }
1685             }
1686
1687             if( ntStatus != STATUS_SUCCESS)
1688             {
1689
1690                 try_return( ntStatus);
1691             }
1692
1693             //
1694             // Decrement the previous parent
1695             //
1696
1697             InterlockedDecrement( &pParentDirEntry->OpenReferenceCount);
1698
1699             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1700                           AFS_TRACE_LEVEL_VERBOSE,
1701                           "AFSLocateNameEntry Decrement5 count on Parent %wZ DE %p Ccb %p Cnt %d\n",
1702                           &pParentDirEntry->NameInformation.FileName,
1703                           pParentDirEntry,
1704                           NULL,
1705                           pParentDirEntry->OpenReferenceCount);
1706
1707             //
1708             // If we ended up substituting a name in the component then update
1709             // the full path and update the pointers
1710             //
1711
1712             if( bSubstituteName)
1713             {
1714
1715                 BOOLEAN bRelativeOpen = FALSE;
1716
1717                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1718                               AFS_TRACE_LEVEL_VERBOSE_2,
1719                               "AFSLocateNameEntry (FO: %08lX) Substituting %wZ into %wZ Index %08lX\n",
1720                               FileObject,
1721                               &uniSearchName,
1722                               &uniComponentName,
1723                               ulSubstituteIndex);
1724
1725                 if( FileObject != NULL &&
1726                     FileObject->RelatedFileObject != NULL)
1727                 {
1728
1729                     bRelativeOpen = TRUE;
1730                 }
1731
1732                 //
1733                 // AFSSubstituteNameInPath will replace the uniFullPathName.Buffer
1734                 // and free the prior Buffer contents but only if the fourth
1735                 // parameter is TRUE.
1736                 //
1737
1738                 ntStatus = AFSSubstituteNameInPath( &uniFullPathName,
1739                                                     &uniComponentName,
1740                                                     &uniSearchName,
1741                                                     &uniRemainingPath,
1742                                                     bRelativeOpen ||
1743                                                             bAllocatedSymLinkBuffer ||
1744                                                             bSubstitutedName);
1745
1746                 if( !NT_SUCCESS( ntStatus))
1747                 {
1748
1749                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1750                                   AFS_TRACE_LEVEL_ERROR,
1751                                   "AFSLocateNameEntry (FO: %08lX) Failure to substitute %wZ into %wZ Index %08lX Status %08lX\n",
1752                                   FileObject,
1753                                   &uniSearchName,
1754                                   &uniComponentName,
1755                                   ulSubstituteIndex,
1756                                   ntStatus);
1757
1758                     try_return( ntStatus);
1759                 }
1760
1761                 //
1762                 // We have substituted a name into the buffer so if we do this again for this
1763                 // path, we need to free up the buffer we allocated.
1764                 //
1765
1766                 bSubstitutedName = TRUE;
1767             }
1768
1769             //
1770             // Update the search parameters
1771             //
1772
1773             uniPathName = uniRemainingPath;
1774
1775             //
1776             // Check if the is a SymLink entry but has no Target FileID or Name. In this
1777             // case it might be a DFS Link so let's go and evaluate it to be sure
1778             //
1779
1780             if( pCurrentObject->FileType == AFS_FILE_TYPE_SYMLINK &&
1781                 pCurrentObject->TargetFileId.Vnode == 0 &&
1782                 pCurrentObject->TargetFileId.Unique == 0 &&
1783                 pDirEntry->NameInformation.TargetName.Length == 0)
1784             {
1785
1786                 ntStatus = AFSValidateSymLink( AuthGroup,
1787                                                pDirEntry);
1788
1789                 if( !NT_SUCCESS( ntStatus))
1790                 {
1791
1792                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1793                                   AFS_TRACE_LEVEL_ERROR,
1794                                   "AFSLocateNameEntry (FO: %08lX) Failed to evaluate possible DFS Link %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1795                                   FileObject,
1796                                   &pDirEntry->NameInformation.FileName,
1797                                   pCurrentObject->FileId.Cell,
1798                                   pCurrentObject->FileId.Volume,
1799                                   pCurrentObject->FileId.Vnode,
1800                                   pCurrentObject->FileId.Unique,
1801                                   ntStatus);
1802
1803                     try_return( ntStatus);
1804                 }
1805             }
1806
1807             //
1808             // Update the name array
1809             //
1810
1811             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1812                           AFS_TRACE_LEVEL_VERBOSE,
1813                           "AFSLocateNameEntry (FO: %08lX) Inserting name array entry %wZ FID %08lX-%08lX-%08lX-%08lX\n",
1814                           FileObject,
1815                           &pDirEntry->NameInformation.FileName,
1816                           pCurrentObject->FileId.Cell,
1817                           pCurrentObject->FileId.Volume,
1818                           pCurrentObject->FileId.Vnode,
1819                           pCurrentObject->FileId.Unique);
1820
1821             ntStatus = AFSInsertNextElement( pNameArray,
1822                                              pDirEntry);
1823
1824             if( !NT_SUCCESS( ntStatus))
1825             {
1826
1827                 try_return( ntStatus);
1828             }
1829         }       // while (TRUE)
1830
1831 try_exit:
1832
1833         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1834                       AFS_TRACE_LEVEL_VERBOSE,
1835                       "AFSLocateNameEntry (FO: %08lX) Completed processing %wZ Status %08lX\n",
1836                       FileObject,
1837                       RootPathName,
1838                       ntStatus);
1839
1840         if( ( !NT_SUCCESS( ntStatus) &&
1841               ntStatus != STATUS_OBJECT_NAME_NOT_FOUND) ||
1842             ntStatus == STATUS_REPARSE)
1843         {
1844
1845             if( pDirEntry != NULL)
1846             {
1847
1848                 InterlockedDecrement( &pDirEntry->OpenReferenceCount);
1849
1850                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1851                               AFS_TRACE_LEVEL_VERBOSE,
1852                               "AFSLocateNameEntry Decrement6 count on %wZ DE %p Ccb %p Cnt %d\n",
1853                               &pDirEntry->NameInformation.FileName,
1854                               pDirEntry,
1855                               NULL,
1856                               pDirEntry->OpenReferenceCount);
1857             }
1858             else if( pParentDirEntry != NULL)
1859             {
1860
1861                 InterlockedDecrement( &pParentDirEntry->OpenReferenceCount);
1862
1863                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1864                               AFS_TRACE_LEVEL_VERBOSE,
1865                               "AFSLocateNameEntry Decrement7 count on %wZ DE %p Ccb %p Cnt %d\n",
1866                               &pParentDirEntry->NameInformation.FileName,
1867                               pParentDirEntry,
1868                               NULL,
1869                               pParentDirEntry->OpenReferenceCount);
1870             }
1871
1872             if( bReleaseCurrentVolume)
1873             {
1874
1875                 ASSERT( pCurrentVolume->VolumeReferenceCount > 1);
1876
1877                 ASSERT( ExIsResourceAcquiredLite( pCurrentVolume->VolumeLock));
1878
1879                 InterlockedDecrement( &pCurrentVolume->VolumeReferenceCount);
1880
1881                 AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
1882                               AFS_TRACE_LEVEL_VERBOSE,
1883                               "AFSLocateNameEntry Decrement3 count on volume %08lX Cnt %d\n",
1884                               pCurrentVolume,
1885                               pCurrentVolume->VolumeReferenceCount);
1886
1887                 AFSReleaseResource( pCurrentVolume->VolumeLock);
1888             }
1889
1890             if( RootPathName->Buffer != uniFullPathName.Buffer)
1891             {
1892
1893                 AFSExFreePool( uniFullPathName.Buffer);
1894             }
1895         }
1896         else
1897         {
1898
1899             if( *ParentDirectoryCB != NULL)
1900             {
1901
1902                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1903                               AFS_TRACE_LEVEL_VERBOSE,
1904                               "AFSLocateNameEntry Count on Parent %wZ DE %p Ccb %p Cnt %d\n",
1905                               &(*ParentDirectoryCB)->NameInformation.FileName,
1906                               *ParentDirectoryCB,
1907                               NULL,
1908                               (*ParentDirectoryCB)->OpenReferenceCount);
1909             }
1910
1911             if( *DirectoryCB != NULL)
1912             {
1913
1914                 AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
1915                               AFS_TRACE_LEVEL_VERBOSE,
1916                               "AFSLocateNameEntry Count on %wZ DE %p Ccb %p Cnt %d\n",
1917                               &(*DirectoryCB)->NameInformation.FileName,
1918                               *DirectoryCB,
1919                               NULL,
1920                               (*DirectoryCB)->OpenReferenceCount);
1921             }
1922         }
1923
1924         if( bSubstituteName &&
1925             uniSearchName.Buffer != NULL)
1926         {
1927
1928             AFSExFreePool( uniSearchName.Buffer);
1929         }
1930     }
1931
1932     return ntStatus;
1933 }
1934
1935 NTSTATUS
1936 AFSCreateDirEntry( IN GUID            *AuthGroup,
1937                    IN AFSObjectInfoCB *ParentObjectInfo,
1938                    IN AFSDirectoryCB *ParentDirCB,
1939                    IN PUNICODE_STRING FileName,
1940                    IN PUNICODE_STRING ComponentName,
1941                    IN ULONG Attributes,
1942                    IN OUT AFSDirectoryCB **DirEntry)
1943 {
1944
1945     NTSTATUS ntStatus = STATUS_SUCCESS;
1946     AFSDirectoryCB *pDirNode = NULL;
1947     UNICODE_STRING uniShortName;
1948     LARGE_INTEGER liFileSize = {0,0};
1949
1950     __Enter
1951     {
1952
1953         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1954                       AFS_TRACE_LEVEL_VERBOSE_2,
1955                       "AFSCreateDirEntry Creating dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ Attribs %08lX\n",
1956                       &ParentDirCB->NameInformation.FileName,
1957                       ParentObjectInfo->FileId.Cell,
1958                       ParentObjectInfo->FileId.Volume,
1959                       ParentObjectInfo->FileId.Vnode,
1960                       ParentObjectInfo->FileId.Unique,
1961                       ComponentName,
1962                       Attributes);
1963
1964         //
1965         // OK, before inserting the node into the parent tree, issue
1966         // the request to the service for node creation
1967         // We will need to drop the lock on the parent node since the create
1968         // could cause a callback into the file system to invalidate it's cache
1969         //
1970
1971         ntStatus = AFSNotifyFileCreate( AuthGroup,
1972                                         ParentObjectInfo,
1973                                         &liFileSize,
1974                                         Attributes,
1975                                         ComponentName,
1976                                         &pDirNode);
1977
1978         //
1979         // If the returned status is STATUS_REPARSE then the entry exists
1980         // and we raced, get out.
1981
1982         if( ntStatus == STATUS_REPARSE)
1983         {
1984
1985             *DirEntry = pDirNode;
1986
1987             try_return( ntStatus = STATUS_SUCCESS);
1988         }
1989
1990         if( !NT_SUCCESS( ntStatus))
1991         {
1992
1993             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1994                           AFS_TRACE_LEVEL_ERROR,
1995                           "AFSCreateDirEntry Failed to create dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ Attribs %08lX Status %08lX\n",
1996                           &ParentDirCB->NameInformation.FileName,
1997                           ParentObjectInfo->FileId.Cell,
1998                           ParentObjectInfo->FileId.Volume,
1999                           ParentObjectInfo->FileId.Vnode,
2000                           ParentObjectInfo->FileId.Unique,
2001                           ComponentName,
2002                           Attributes,
2003                           ntStatus);
2004
2005             try_return( ntStatus);
2006         }
2007
2008         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2009                       AFS_TRACE_LEVEL_VERBOSE_2,
2010                       "AFSCreateDirEntry Inserting dir entry in parent %wZ FID %08lX-%08lX-%08lX-%08lX Component %wZ\n",
2011                       &ParentDirCB->NameInformation.FileName,
2012                       ParentObjectInfo->FileId.Cell,
2013                       ParentObjectInfo->FileId.Volume,
2014                       ParentObjectInfo->FileId.Vnode,
2015                       ParentObjectInfo->FileId.Unique,
2016                       ComponentName);
2017
2018         //
2019         // Insert the directory node
2020         //
2021
2022         AFSInsertDirectoryNode( ParentObjectInfo,
2023                                 pDirNode,
2024                                 TRUE);
2025
2026         //
2027         // Pass back the dir entry
2028         //
2029
2030         *DirEntry = pDirNode;
2031
2032 try_exit:
2033
2034         NOTHING;
2035     }
2036
2037     return ntStatus;
2038 }
2039
2040 void
2041 AFSInsertDirectoryNode( IN AFSObjectInfoCB *ParentObjectInfo,
2042                         IN AFSDirectoryCB *DirEntry,
2043                         IN BOOLEAN InsertInEnumList)
2044 {
2045
2046     __Enter
2047     {
2048
2049         AFSAcquireExcl( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock,
2050                         TRUE);
2051
2052         //
2053         // Insert the node into the directory node tree
2054         //
2055
2056         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2057                       AFS_TRACE_LEVEL_VERBOSE,
2058                       "AFSInsertDirectoryNode Insert DE %p for %wZ Clearing NOT_IN flag\n",
2059                       DirEntry,
2060                       &DirEntry->NameInformation.FileName);
2061
2062         ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE);
2063
2064         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead == NULL)
2065         {
2066
2067             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead = DirEntry;
2068
2069             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2070                           AFS_TRACE_LEVEL_VERBOSE,
2071                           "AFSInsertDirectoryNode Insert DE %p to head of case sensitive tree for %wZ\n",
2072                           DirEntry,
2073                           &DirEntry->NameInformation.FileName);
2074         }
2075         else
2076         {
2077
2078             AFSInsertCaseSensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseSensitiveTreeHead,
2079                                             DirEntry);
2080
2081             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2082                           AFS_TRACE_LEVEL_VERBOSE,
2083                           "AFSInsertDirectoryNode Insert DE %p to case sensitive tree for %wZ\n",
2084                           DirEntry,
2085                           &DirEntry->NameInformation.FileName);
2086         }
2087
2088         if( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead == NULL)
2089         {
2090
2091             ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead = DirEntry;
2092
2093             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_CASE_INSENSTIVE_LIST_HEAD);
2094
2095             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2096                           AFS_TRACE_LEVEL_VERBOSE,
2097                           "AFSInsertDirectoryNode Insert DE %p to head of case insensitive tree for %wZ\n",
2098                           DirEntry,
2099                           &DirEntry->NameInformation.FileName);
2100         }
2101         else
2102         {
2103
2104             AFSInsertCaseInsensitiveDirEntry( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.CaseInsensitiveTreeHead,
2105                                               DirEntry);
2106
2107             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2108                           AFS_TRACE_LEVEL_VERBOSE,
2109                           "AFSInsertDirectoryNode Insert DE %p to case sensitive tree for %wZ\n",
2110                           DirEntry,
2111                           &DirEntry->NameInformation.FileName);
2112         }
2113
2114         //
2115         // Into the shortname tree
2116         //
2117
2118         if( DirEntry->Type.Data.ShortNameTreeEntry.HashIndex != 0)
2119         {
2120
2121             if( ParentObjectInfo->Specific.Directory.ShortNameTree == NULL)
2122             {
2123
2124                 ParentObjectInfo->Specific.Directory.ShortNameTree = DirEntry;
2125
2126                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2127                               AFS_TRACE_LEVEL_VERBOSE,
2128                               "AFSInsertDirectoryNode Insert DE %p to head of shortname tree for %wZ\n",
2129                               DirEntry,
2130                               &DirEntry->NameInformation.FileName);
2131             }
2132             else
2133             {
2134
2135                 AFSInsertShortNameDirEntry( ParentObjectInfo->Specific.Directory.ShortNameTree,
2136                                             DirEntry);
2137
2138                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2139                               AFS_TRACE_LEVEL_VERBOSE,
2140                               "AFSInsertDirectoryNode Insert DE %p to shortname tree for %wZ\n",
2141                               DirEntry,
2142                               &DirEntry->NameInformation.FileName);
2143             }
2144         }
2145
2146         if( InsertInEnumList)
2147         {
2148
2149             //
2150             // And insert the node into the directory list
2151             //
2152
2153             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2154                           AFS_TRACE_LEVEL_VERBOSE,
2155                           "AFSInsertDirectoryNode Inserting entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lXStatus %08lX\n",
2156                           DirEntry,
2157                           &DirEntry->NameInformation.FileName,
2158                           DirEntry->ObjectInformation->FileId.Cell,
2159                           DirEntry->ObjectInformation->FileId.Volume,
2160                           DirEntry->ObjectInformation->FileId.Vnode,
2161                           DirEntry->ObjectInformation->FileId.Unique);
2162
2163             if( ParentObjectInfo->Specific.Directory.DirectoryNodeListHead == NULL)
2164             {
2165
2166                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = DirEntry;
2167             }
2168             else
2169             {
2170
2171                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail->ListEntry.fLink = (void *)DirEntry;
2172
2173                 DirEntry->ListEntry.bLink = (void *)ParentObjectInfo->Specific.Directory.DirectoryNodeListTail;
2174             }
2175
2176             ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = DirEntry;
2177
2178             SetFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2179
2180             InterlockedIncrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2181
2182             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2183                           AFS_TRACE_LEVEL_VERBOSE,
2184                           "AFSInsertDirectoryNode Adding entry %wZ Inc Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2185                               &DirEntry->NameInformation.FileName,
2186                               ParentObjectInfo->Specific.Directory.DirectoryNodeCount,
2187                               ParentObjectInfo->FileId.Cell,
2188                               ParentObjectInfo->FileId.Volume,
2189                               ParentObjectInfo->FileId.Vnode,
2190                               ParentObjectInfo->FileId.Unique);
2191         }
2192
2193         AFSReleaseResource( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2194     }
2195
2196     return;
2197 }
2198
2199 NTSTATUS
2200 AFSDeleteDirEntry( IN AFSObjectInfoCB *ParentObjectInfo,
2201                    IN AFSDirectoryCB *DirEntry)
2202 {
2203
2204     NTSTATUS ntStatus = STATUS_SUCCESS;
2205
2206     __Enter
2207     {
2208
2209         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2210                       AFS_TRACE_LEVEL_VERBOSE,
2211                       "AFSDeleteDirEntry Deleting dir entry in parent %08lX Entry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2212                       ParentObjectInfo,
2213                       DirEntry,
2214                       &DirEntry->NameInformation.FileName,
2215                       DirEntry->ObjectInformation->FileId.Cell,
2216                       DirEntry->ObjectInformation->FileId.Volume,
2217                       DirEntry->ObjectInformation->FileId.Vnode,
2218                       DirEntry->ObjectInformation->FileId.Unique);
2219
2220         AFSRemoveDirNodeFromParent( ParentObjectInfo,
2221                                     DirEntry,
2222                                     TRUE);
2223
2224         //
2225         // Free up the name buffer if it was reallocated
2226         //
2227
2228         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_NAME_BUFFER))
2229         {
2230
2231             AFSExFreePool( DirEntry->NameInformation.FileName.Buffer);
2232         }
2233
2234         if( BooleanFlagOn( DirEntry->Flags, AFS_DIR_RELEASE_TARGET_NAME_BUFFER))
2235         {
2236
2237             AFSExFreePool( DirEntry->NameInformation.TargetName.Buffer);
2238         }
2239
2240         //
2241         // Dereference the object for this dir entry
2242         //
2243
2244         ASSERT( DirEntry->ObjectInformation->ObjectReferenceCount > 0);
2245
2246         InterlockedDecrement( &DirEntry->ObjectInformation->ObjectReferenceCount);
2247
2248         AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2249                       AFS_TRACE_LEVEL_VERBOSE,
2250                       "AFSDeleteDirEntry Decrement count on object %08lX Cnt %d\n",
2251                       DirEntry->ObjectInformation,
2252                       DirEntry->ObjectInformation->ObjectReferenceCount);
2253
2254         ExDeleteResourceLite( &DirEntry->NonPaged->Lock);
2255
2256         AFSExFreePool( DirEntry->NonPaged);
2257
2258         //
2259         // Free up the dir entry
2260         //
2261
2262         AFSExFreePool( DirEntry);
2263     }
2264
2265     return ntStatus;
2266 }
2267
2268 NTSTATUS
2269 AFSRemoveDirNodeFromParent( IN AFSObjectInfoCB *ParentObjectInfo,
2270                             IN AFSDirectoryCB *DirEntry,
2271                             IN BOOLEAN RemoveFromEnumList)
2272 {
2273
2274     NTSTATUS ntStatus = STATUS_SUCCESS;
2275
2276     __Enter
2277     {
2278
2279
2280         ASSERT( ExIsResourceAcquiredExclusiveLite( ParentObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock));
2281
2282         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2283                       AFS_TRACE_LEVEL_VERBOSE,
2284                       "AFSRemoveDirNodeFromParent Removing DirEntry %08lX %wZ FID %08lX-%08lX-%08lX-%08lX from Parent %08lX\n",
2285                       DirEntry,
2286                       &DirEntry->NameInformation.FileName,
2287                       DirEntry->ObjectInformation->FileId.Cell,
2288                       DirEntry->ObjectInformation->FileId.Volume,
2289                       DirEntry->ObjectInformation->FileId.Vnode,
2290                       DirEntry->ObjectInformation->FileId.Unique,
2291                       ParentObjectInfo);
2292
2293         if( !BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE))
2294         {
2295
2296             AFSRemoveNameEntry( ParentObjectInfo,
2297                                 DirEntry);
2298         }
2299         else
2300         {
2301
2302             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2303                           AFS_TRACE_LEVEL_VERBOSE,
2304                           "AFSRemoveDirNodeFromParent DE %p for %wZ NOT removing entry due to flag set\n",
2305                           DirEntry,
2306                           &DirEntry->NameInformation.FileName);
2307
2308         }
2309
2310         if( RemoveFromEnumList &&
2311             BooleanFlagOn( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST))
2312         {
2313
2314             //
2315             // And remove the entry from the enumeration list
2316             //
2317
2318             if( DirEntry->ListEntry.fLink == NULL)
2319             {
2320
2321                 ParentObjectInfo->Specific.Directory.DirectoryNodeListTail = (AFSDirectoryCB *)DirEntry->ListEntry.bLink;
2322             }
2323             else
2324             {
2325
2326                 ((AFSDirectoryCB *)DirEntry->ListEntry.fLink)->ListEntry.bLink = DirEntry->ListEntry.bLink;
2327             }
2328
2329             if( DirEntry->ListEntry.bLink == NULL)
2330             {
2331
2332                 ParentObjectInfo->Specific.Directory.DirectoryNodeListHead = (AFSDirectoryCB *)DirEntry->ListEntry.fLink;
2333             }
2334             else
2335             {
2336
2337                 ((AFSDirectoryCB *)DirEntry->ListEntry.bLink)->ListEntry.fLink = DirEntry->ListEntry.fLink;
2338             }
2339
2340             ASSERT( ParentObjectInfo->Specific.Directory.DirectoryNodeCount > 0);
2341
2342             InterlockedDecrement( &ParentObjectInfo->Specific.Directory.DirectoryNodeCount);
2343
2344             ClearFlag( DirEntry->Flags, AFS_DIR_ENTRY_INSERTED_ENUM_LIST);
2345
2346             AFSDbgLogMsg( AFS_SUBSYSTEM_DIR_NODE_COUNT,
2347                           AFS_TRACE_LEVEL_VERBOSE,
2348                           "AFSRemoveDirNodeFromParent Removing entry %wZ Dec Count %d to parent FID %08lX-%08lX-%08lX-%08lX\n",
2349                           &DirEntry->NameInformation.FileName,
2350                           ParentObjectInfo->Specific.Directory.DirectoryNodeCount,
2351                           ParentObjectInfo->FileId.Cell,
2352                           ParentObjectInfo->FileId.Volume,
2353                           ParentObjectInfo->FileId.Vnode,
2354                           ParentObjectInfo->FileId.Unique);
2355
2356             DirEntry->ListEntry.fLink = NULL;
2357             DirEntry->ListEntry.bLink = NULL;
2358         }
2359     }
2360
2361     return ntStatus;
2362 }
2363
2364 NTSTATUS
2365 AFSFixupTargetName( IN OUT PUNICODE_STRING FileName,
2366                     IN OUT PUNICODE_STRING TargetFileName)
2367 {
2368
2369     NTSTATUS ntStatus = STATUS_SUCCESS;
2370     UNICODE_STRING uniFileName;
2371
2372     __Enter
2373     {
2374
2375         //
2376         // We will process backwards from the end of the name looking
2377         // for the first \ we encounter
2378         //
2379
2380         uniFileName.Length = FileName->Length;
2381         uniFileName.MaximumLength = FileName->MaximumLength;
2382
2383         uniFileName.Buffer = FileName->Buffer;
2384
2385         while( TRUE)
2386         {
2387
2388             if( uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) - 1] == L'\\')
2389             {
2390
2391                 //
2392                 // Subtract one more character off of the filename if it is not the root
2393                 //
2394
2395                 if( uniFileName.Length > sizeof( WCHAR))
2396                 {
2397
2398                     uniFileName.Length -= sizeof( WCHAR);
2399                 }
2400
2401                 //
2402                 // Now build up the target name
2403                 //
2404
2405                 TargetFileName->Length = FileName->Length - uniFileName.Length;
2406
2407                 //
2408                 // If we are not on the root then fixup the name
2409                 //
2410
2411                 if( uniFileName.Length > sizeof( WCHAR))
2412                 {
2413
2414                     TargetFileName->Length -= sizeof( WCHAR);
2415
2416                     TargetFileName->Buffer = &uniFileName.Buffer[ (uniFileName.Length/sizeof( WCHAR)) + 1];
2417                 }
2418                 else
2419                 {
2420
2421                     TargetFileName->Buffer = &uniFileName.Buffer[ uniFileName.Length/sizeof( WCHAR)];
2422                 }
2423
2424                 //
2425                 // Fixup the passed back filename length
2426                 //
2427
2428                 FileName->Length = uniFileName.Length;
2429
2430                 TargetFileName->MaximumLength = TargetFileName->Length;
2431
2432                 break;
2433             }
2434
2435             uniFileName.Length -= sizeof( WCHAR);
2436         }
2437     }
2438
2439     return ntStatus;
2440 }
2441
2442 NTSTATUS
2443 AFSParseName( IN PIRP Irp,
2444               IN GUID *AuthGroup,
2445               OUT PUNICODE_STRING FileName,
2446               OUT PUNICODE_STRING ParsedFileName,
2447               OUT PUNICODE_STRING RootFileName,
2448               OUT ULONG *ParseFlags,
2449               OUT AFSVolumeCB   **VolumeCB,
2450               OUT AFSDirectoryCB **ParentDirectoryCB,
2451               OUT AFSNameArrayHdr **NameArray)
2452 {
2453
2454     NTSTATUS            ntStatus = STATUS_SUCCESS;
2455     PIO_STACK_LOCATION  pIrpSp = IoGetCurrentIrpStackLocation( Irp);
2456     AFSDeviceExt       *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2457     UNICODE_STRING      uniFullName, uniComponentName, uniRemainingPath;
2458     ULONG               ulCRC = 0;
2459     AFSDirectoryCB     *pDirEntry = NULL, *pShareDirEntry = NULL, *pTargetDirEntry = NULL;
2460     USHORT              usIndex = 0, usDriveIndex = 0;
2461     AFSCcb             *pRelatedCcb = NULL;
2462     AFSNameArrayHdr    *pNameArray = NULL, *pRelatedNameArray = NULL;
2463     USHORT              usComponentIndex = 0;
2464     USHORT              usComponentLength = 0;
2465     AFSVolumeCB        *pVolumeCB = NULL;
2466     AFSFcb             *pRelatedFcb = NULL;
2467     BOOLEAN             bReleaseTreeLock = FALSE;
2468     BOOLEAN             bIsAllShare = FALSE;
2469
2470     __Enter
2471     {
2472
2473         //
2474         // Indicate we are opening a root ...
2475         //
2476
2477         *ParseFlags = AFS_PARSE_FLAG_ROOT_ACCESS;
2478
2479         if( pIrpSp->FileObject->RelatedFileObject != NULL)
2480         {
2481
2482             pRelatedFcb = (AFSFcb *)pIrpSp->FileObject->RelatedFileObject->FsContext;
2483
2484             pRelatedCcb = (AFSCcb *)pIrpSp->FileObject->RelatedFileObject->FsContext2;
2485
2486             pRelatedNameArray = pRelatedCcb->NameArray;
2487
2488             uniFullName = pIrpSp->FileObject->FileName;
2489
2490             ASSERT( pRelatedFcb != NULL);
2491
2492             //
2493             // No wild cards in the name
2494             //
2495
2496             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2497                           AFS_TRACE_LEVEL_VERBOSE_2,
2498                           "AFSParseName (%08lX) Relative open for %wZ FID %08lX-%08lX-%08lX-%08lX component %wZ\n",
2499                           Irp,
2500                           &pRelatedCcb->DirectoryCB->NameInformation.FileName,
2501                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Cell,
2502                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Volume,
2503                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Vnode,
2504                           pRelatedCcb->DirectoryCB->ObjectInformation->FileId.Unique,
2505                           &uniFullName);
2506
2507             if( FsRtlDoesNameContainWildCards( &uniFullName))
2508             {
2509
2510                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2511                               AFS_TRACE_LEVEL_ERROR,
2512                               "AFSParseName (%08lX) Component %wZ contains wild cards\n",
2513                               Irp,
2514                               &uniFullName);
2515
2516                 try_return( ntStatus = STATUS_OBJECT_NAME_INVALID);
2517             }
2518
2519             pVolumeCB = pRelatedFcb->ObjectInformation->VolumeCB;
2520
2521             pDirEntry = pRelatedCcb->DirectoryCB;
2522
2523             *FileName = pIrpSp->FileObject->FileName;
2524
2525             //
2526             // Grab the root node exclusive before returning
2527             //
2528
2529             AFSAcquireExcl( pVolumeCB->VolumeLock,
2530                             TRUE);
2531
2532             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID) ||
2533                 BooleanFlagOn( pVolumeCB->Flags, AFS_VOLUME_FLAGS_OFFLINE))
2534             {
2535
2536                 //
2537                 // The volume has been taken off line so fail the access
2538                 //
2539
2540                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2541                               AFS_TRACE_LEVEL_ERROR,
2542                               "AFSParseName (%08lX) Volume %08lX:%08lX OFFLINE/INVALID\n",
2543                               Irp,
2544                               pVolumeCB->ObjectInformation.FileId.Cell,
2545                               pVolumeCB->ObjectInformation.FileId.Volume);
2546
2547                 AFSReleaseResource( pVolumeCB->VolumeLock);
2548
2549                 try_return( ntStatus = STATUS_DEVICE_NOT_READY);
2550             }
2551
2552             if( BooleanFlagOn( pVolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_VERIFY))
2553             {
2554
2555                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2556                               AFS_TRACE_LEVEL_VERBOSE,
2557                               "AFSParseName (%08lX) Verifying root of volume %08lX:%08lX\n",
2558                               Irp,
2559                               pVolumeCB->ObjectInformation.FileId.Cell,
2560                               pVolumeCB->ObjectInformation.FileId.Volume);
2561
2562                 ntStatus = AFSVerifyVolume( (ULONGLONG)PsGetCurrentProcessId(),
2563                                             pVolumeCB);
2564
2565                 if( !NT_SUCCESS( ntStatus))
2566                 {
2567
2568                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2569                                   AFS_TRACE_LEVEL_ERROR,
2570                                   "AFSParseName (%08lX) Failed verification of root Status %08lX\n",
2571                                   Irp,
2572                                   ntStatus);
2573
2574                     AFSReleaseResource( pVolumeCB->VolumeLock);
2575
2576                     try_return( ntStatus);
2577                 }
2578             }
2579
2580             AFSConvertToShared( pVolumeCB->VolumeLock);
2581
2582             if( BooleanFlagOn( pDirEntry->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY))
2583             {
2584
2585                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2586                               AFS_TRACE_LEVEL_VERBOSE,
2587                               "AFSParseName (%08lX) Verifying parent %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2588                               Irp,
2589                               &pDirEntry->NameInformation.FileName,
2590                               pDirEntry->ObjectInformation->FileId.Cell,
2591                               pDirEntry->ObjectInformation->FileId.Volume,
2592                               pDirEntry->ObjectInformation->FileId.Vnode,
2593                               pDirEntry->ObjectInformation->FileId.Unique);
2594
2595                 ntStatus = AFSVerifyEntry( AuthGroup,
2596                                            pDirEntry);
2597
2598                 if( !NT_SUCCESS( ntStatus))
2599                 {
2600
2601                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2602                                   AFS_TRACE_LEVEL_VERBOSE,
2603                                   "AFSParseName (%08lX) Failed verification of parent %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
2604                                   Irp,
2605                                   &pDirEntry->NameInformation.FileName,
2606                                   pDirEntry->ObjectInformation->FileId.Cell,
2607                                   pDirEntry->ObjectInformation->FileId.Volume,
2608                                   pDirEntry->ObjectInformation->FileId.Vnode,
2609                                   pDirEntry->ObjectInformation->FileId.Unique,
2610                                   ntStatus);
2611
2612                     AFSReleaseResource( pVolumeCB->VolumeLock);
2613
2614                     try_return( ntStatus);
2615                 }
2616             }
2617
2618             //
2619             // Create our full path name buffer
2620             //
2621
2622             uniFullName.MaximumLength = pRelatedCcb->FullFileName.Length +
2623                                                     sizeof( WCHAR) +
2624                                                     pIrpSp->FileObject->FileName.Length +
2625                                                     sizeof( WCHAR);
2626
2627             uniFullName.Length = 0;
2628
2629             uniFullName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
2630                                                                     uniFullName.MaximumLength,
2631                                                                     AFS_NAME_BUFFER_THREE_TAG);
2632
2633             if( uniFullName.Buffer == NULL)
2634             {
2635
2636                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2637                               AFS_TRACE_LEVEL_ERROR,
2638                               "AFSParseName (%08lX) Failed to allocate full name buffer\n",
2639                               Irp);
2640
2641                 AFSReleaseResource( pVolumeCB->VolumeLock);
2642
2643                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2644             }
2645
2646             RtlZeroMemory( uniFullName.Buffer,
2647                            uniFullName.MaximumLength);
2648
2649             RtlCopyMemory( uniFullName.Buffer,
2650                            pRelatedCcb->FullFileName.Buffer,
2651                            pRelatedCcb->FullFileName.Length);
2652
2653             uniFullName.Length = pRelatedCcb->FullFileName.Length;
2654
2655             usComponentIndex = (USHORT)(uniFullName.Length/sizeof( WCHAR));
2656
2657             usComponentLength = pIrpSp->FileObject->FileName.Length;
2658
2659             if( uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR)) - 1] != L'\\' &&
2660                 pIrpSp->FileObject->FileName.Length > 0 &&
2661                 pIrpSp->FileObject->FileName.Buffer[ 0] != L'\\' &&
2662                 pIrpSp->FileObject->FileName.Buffer[ 0] != L':')
2663             {
2664
2665                 uniFullName.Buffer[ (uniFullName.Length/sizeof( WCHAR))] = L'\\';
2666
2667                 uniFullName.Length += sizeof( WCHAR);
2668
2669                 usComponentLength += sizeof( WCHAR);
2670             }
2671
2672             if( pIrpSp->FileObject->FileName.Length > 0)
2673             {
2674
2675                 RtlCopyMemory( &uniFullName.Buffer[ uniFullName.Length/sizeof( WCHAR)],
2676                                pIrpSp->FileObject->FileName.Buffer,
2677                                pIr\epSp->FileObject->FileName.Length);
2678
2679                 uniFullName.Length += pIrpSp->FileObject->FileName.Length;
2680             }
2681
2682             *RootFileName = uniFullName;
2683
2684             //
2685             // We populate up to the current parent
2686             //
2687
2688             if( pRelatedNameArray == NULL)
2689             {
2690
2691                 //
2692                 // Init and populate our name array
2693                 //
2694
2695                 pNameArray = AFSInitNameArray( NULL,
2696                                                0);
2697
2698                 if( pNameArray == NULL)
2699                 {
2700
2701                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2702                                   AFS_TRACE_LEVEL_VERBOSE,
2703                                   "AFSParseName (%08lX) Failed to initialize name array\n",
2704                                   Irp);
2705
2706                     AFSExFreePool( uniFullName.Buffer);
2707
2708                     AFSReleaseResource( pVolumeCB->VolumeLock);
2709
2710                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2711                 }
2712
2713                 ntStatus = AFSPopulateNameArray( pNameArray,
2714                                                  NULL,
2715                                                  pRelatedCcb->DirectoryCB);
2716             }
2717             else
2718             {
2719
2720                 //
2721                 // Init and populate our name array
2722                 //
2723
2724                 pNameArray = AFSInitNameArray( NULL,
2725                                                pRelatedNameArray->MaxElementCount);
2726
2727                 if( pNameArray == NULL)
2728                 {
2729
2730                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2731                                   AFS_TRACE_LEVEL_VERBOSE,
2732                                   "AFSParseName (%08lX) Failed to initialize name array\n",
2733                                   Irp);
2734
2735                     AFSExFreePool( uniFullName.Buffer);
2736
2737                     AFSReleaseResource( pVolumeCB->VolumeLock);
2738
2739                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2740                 }
2741
2742                 ntStatus = AFSPopulateNameArrayFromRelatedArray( pNameArray,
2743                                                                  pRelatedNameArray,
2744                                                                  pRelatedCcb->DirectoryCB);
2745             }
2746
2747             if( !NT_SUCCESS( ntStatus))
2748             {
2749
2750                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2751                               AFS_TRACE_LEVEL_VERBOSE,
2752                               "AFSParseName (%08lX) Failed to populate name array\n",
2753                               Irp);
2754
2755                 AFSExFreePool( uniFullName.Buffer);
2756
2757                 AFSReleaseResource( pVolumeCB->VolumeLock);
2758
2759                 try_return( ntStatus);
2760             }
2761
2762             ParsedFileName->Length = usComponentLength;
2763             ParsedFileName->MaximumLength = uniFullName.MaximumLength;
2764
2765             ParsedFileName->Buffer = &uniFullName.Buffer[ usComponentIndex];
2766
2767             //
2768             // Indicate to caller that RootFileName must be freed
2769             //
2770
2771             SetFlag( *ParseFlags, AFS_PARSE_FLAG_FREE_FILE_BUFFER);
2772
2773             *NameArray = pNameArray;
2774
2775             *VolumeCB = pVolumeCB;
2776
2777             //
2778             // Increment our volume reference count
2779             //
2780
2781             InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
2782
2783             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
2784                           AFS_TRACE_LEVEL_VERBOSE,
2785                           "AFSParseName Increment count on volume %08lX Cnt %d\n",
2786                           pVolumeCB,
2787                           pVolumeCB->VolumeReferenceCount);
2788
2789             *ParentDirectoryCB = pDirEntry;
2790
2791             InterlockedIncrement( &pDirEntry->OpenReferenceCount);
2792
2793             AFSDbgLogMsg( AFS_SUBSYSTEM_DIRENTRY_REF_COUNTING,
2794                           AFS_TRACE_LEVEL_VERBOSE,
2795                           "AFSParseName Increment1 count on %wZ DE %p Ccb %p Cnt %d\n",
2796                           &pDirEntry->NameInformation.FileName,
2797                           pDirEntry,
2798                           NULL,
2799                           pDirEntry->OpenReferenceCount);
2800
2801             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2802                           AFS_TRACE_LEVEL_VERBOSE_2,
2803                           "AFSParseName (%08lX) Returning full name %wZ\n",
2804                           Irp,
2805                           &uniFullName);
2806
2807             try_return( ntStatus);
2808         }
2809
2810         //
2811         // No wild cards in the name
2812         //
2813
2814         uniFullName = pIrpSp->FileObject->FileName;
2815
2816         if( FsRtlDoesNameContainWildCards( &uniFullName) ||
2817             uniFullName.Length < AFSServerName.Length)
2818         {
2819
2820             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2821                           AFS_TRACE_LEVEL_ERROR,
2822                           "AFSParseName (%08lX) Name %wZ contains wild cards or too short\n",
2823                           Irp,
2824                           &uniFullName);
2825
2826             try_return( ntStatus = STATUS_OBJECT_NAME_INVALID);
2827         }
2828
2829         //
2830         // The name is a fully qualified name. Parse out the server/share names and
2831         // point to the root qualified name
2832         // First thing is to locate the server name
2833         //
2834
2835         FsRtlDissectName( uniFullName,
2836                           &uniComponentName,
2837                           &uniRemainingPath);
2838
2839         uniFullName = uniRemainingPath;
2840
2841         //
2842         // This component is the server name we are serving
2843         //
2844
2845         if( RtlCompareUnicodeString( &uniComponentName,
2846                                      &AFSServerName,
2847                                      TRUE) != 0)
2848         {
2849
2850             //
2851             // Drive letter based name?
2852             //
2853
2854             uniFullName = pIrpSp->FileObject->FileName;
2855
2856             while( usIndex < uniFullName.Length/sizeof( WCHAR))
2857             {
2858
2859                 if( uniFullName.Buffer[ usIndex] == L':')
2860                 {
2861
2862                     uniFullName.Buffer = &uniFullName.Buffer[ usIndex + 2];
2863
2864                     uniFullName.Length -= (usIndex + 2) * sizeof( WCHAR);
2865
2866                     usDriveIndex = usIndex - 1;
2867
2868                     break;
2869                 }
2870
2871                 usIndex++;
2872             }
2873