Windows: Use ulFilter in AFSInvalidateObject
[openafs.git] / src / WINNT / afsrdr / kernel / lib / AFSGeneric.cpp
1 /*
2  * Copyright (c) 2008, 2009, 2010, 2011 Kernel Drivers, LLC.
3  * Copyright (c) 2009, 2010, 2011 Your File System, Inc.
4  * All rights reserved.
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8  * are met:
9  *
10  * - Redistributions of source code must retain the above copyright notice,
11  *   this list of conditions and the following disclaimer.
12  * - Redistributions in binary form must reproduce the above copyright
13  *   notice,
14  *   this list of conditions and the following disclaimer in the
15  *   documentation
16  *   and/or other materials provided with the distribution.
17  * - Neither the names of Kernel Drivers, LLC and Your File System, Inc.
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19  *   products derived from this software without specific prior written
20  *   permission from Kernel Drivers, LLC and Your File System, Inc.
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33  */
34
35 //
36 // File: AFSGeneric.cpp
37 //
38
39 #include "AFSCommon.h"
40
41 //
42 // Function: AFSExceptionFilter
43 //
44 // Description:
45 //
46 //      This function is the exception handler
47 //
48 // Return:
49 //
50 //      A status is returned for the function
51 //
52
53 ULONG
54 AFSExceptionFilter( IN ULONG Code,
55                     IN PEXCEPTION_POINTERS ExceptPtrs)
56 {
57
58     PEXCEPTION_RECORD ExceptRec;
59     PCONTEXT Context;
60
61     __try
62     {
63
64         ExceptRec = ExceptPtrs->ExceptionRecord;
65
66         Context = ExceptPtrs->ContextRecord;
67
68         AFSDbgLogMsg( 0,
69                       0,
70                       "AFSExceptionFilter (Library) - EXR %p CXR %p Code %08lX Address %p Routine %p\n",
71                       ExceptRec,
72                       Context,
73                       ExceptRec->ExceptionCode,
74                       ExceptRec->ExceptionAddress,
75                       (void *)AFSExceptionFilter);
76
77         DbgPrint("**** Exception Caught in AFS Redirector Library ****\n");
78
79         DbgPrint("\n\nPerform the following WnDbg Cmds:\n");
80         DbgPrint("\n\t.exr %p ;  .cxr %p\n\n", ExceptRec, Context);
81
82         DbgPrint("**** Exception Complete from AFS Redirector Library ****\n");
83
84         if( BooleanFlagOn( AFSDebugFlags, AFS_DBG_BUGCHECK_EXCEPTION))
85         {
86
87             KeBugCheck( (ULONG)-2);
88         }
89         else
90         {
91
92             AFSBreakPoint();
93         }
94     }
95     __except( EXCEPTION_EXECUTE_HANDLER)
96     {
97
98         NOTHING;
99     }
100
101     return EXCEPTION_EXECUTE_HANDLER;
102 }
103
104 //
105 // Function: AFSLibExAllocatePoolWithTag()
106 //
107 // Purpose: Allocate Pool Memory.  If BugCheck Exception flag
108 //          is configured on, then bugcheck the system if
109 //          a memory allocation fails.  The routine should be
110 //          used for all memory allocations that are to be freed
111 //          when the library is unloaded.  Memory allocations that
112 //          are to survive library unload and reload should be
113 //          performed using AFSExAllocatePoolWithTag() which is
114 //          provided by the AFS Framework.
115 //
116 // Parameters:
117 //                POOL_TYPE PoolType - Paged or NonPaged
118 //                SIZE_T NumberOfBytes - requested allocation size
119 //                ULONG  Tag - Pool Allocation Tag to be applied for tracking
120 //
121 // Return:
122 //                void * - the memory allocation
123 //
124
125 void *
126 AFSLibExAllocatePoolWithTag( IN POOL_TYPE  PoolType,
127                              IN SIZE_T  NumberOfBytes,
128                              IN ULONG  Tag)
129 {
130
131     void *pBuffer = NULL;
132
133     pBuffer = ExAllocatePoolWithTag( PoolType,
134                                      NumberOfBytes,
135                                      Tag);
136
137     if( pBuffer == NULL)
138     {
139
140         if( BooleanFlagOn( AFSDebugFlags, AFS_DBG_BUGCHECK_EXCEPTION))
141         {
142
143             KeBugCheck( (ULONG)-2);
144         }
145         else
146         {
147
148             AFSDbgLogMsg( 0,
149                           0,
150                           "AFSLibExAllocatePoolWithTag failure Type %08lX Size %08lX Tag %08lX %08lX\n",
151                           PoolType,
152                           NumberOfBytes,
153                           Tag,
154                           PsGetCurrentThread());
155
156             AFSBreakPoint();
157         }
158     }
159
160     return pBuffer;
161 }
162
163 //
164 // Function: AFSAcquireExcl()
165 //
166 // Purpose: Called to acquire a resource exclusive with optional wait
167 //
168 // Parameters:
169 //                PERESOURCE Resource - Resource to acquire
170 //                BOOLEAN Wait - Whether to block
171 //
172 // Return:
173 //                BOOLEAN - Whether the mask was acquired
174 //
175
176 BOOLEAN
177 AFSAcquireExcl( IN PERESOURCE Resource,
178                 IN BOOLEAN wait)
179 {
180
181     BOOLEAN bStatus = FALSE;
182
183     //
184     // Normal kernel APCs must be disabled before calling
185     // ExAcquireResourceExclusiveLite. Otherwise a bugcheck occurs.
186     //
187
188     KeEnterCriticalRegion();
189
190     bStatus = ExAcquireResourceExclusiveLite( Resource,
191                                               wait);
192
193     if( !bStatus)
194     {
195
196         KeLeaveCriticalRegion();
197     }
198
199     return bStatus;
200 }
201
202 BOOLEAN
203 AFSAcquireSharedStarveExclusive( IN PERESOURCE Resource,
204                                  IN BOOLEAN Wait)
205 {
206
207     BOOLEAN bStatus = FALSE;
208
209     KeEnterCriticalRegion();
210
211     bStatus = ExAcquireSharedStarveExclusive( Resource,
212                                               Wait);
213
214     if( !bStatus)
215     {
216
217         KeLeaveCriticalRegion();
218     }
219
220     return bStatus;
221 }
222
223 //
224 // Function: AFSAcquireShared()
225 //
226 // Purpose: Called to acquire a resource shared with optional wait
227 //
228 // Parameters:
229 //                PERESOURCE Resource - Resource to acquire
230 //                BOOLEAN Wait - Whether to block
231 //
232 // Return:
233 //                BOOLEAN - Whether the mask was acquired
234 //
235
236 BOOLEAN
237 AFSAcquireShared( IN PERESOURCE Resource,
238                   IN BOOLEAN wait)
239 {
240
241     BOOLEAN bStatus = FALSE;
242
243     KeEnterCriticalRegion();
244
245     bStatus = ExAcquireResourceSharedLite( Resource,
246                                            wait);
247
248     if( !bStatus)
249     {
250
251         KeLeaveCriticalRegion();
252     }
253
254     return bStatus;
255 }
256
257 //
258 // Function: AFSReleaseResource()
259 //
260 // Purpose: Called to release a resource
261 //
262 // Parameters:
263 //                PERESOURCE Resource - Resource to release
264 //
265 // Return:
266 //                None
267 //
268
269 void
270 AFSReleaseResource( IN PERESOURCE Resource)
271 {
272
273     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
274                   AFS_TRACE_LEVEL_VERBOSE,
275                   "AFSReleaseResource Releasing lock %08lX Thread %08lX\n",
276                   Resource,
277                   PsGetCurrentThread());
278
279     ExReleaseResourceLite( Resource);
280
281     KeLeaveCriticalRegion();
282
283     return;
284 }
285
286 void
287 AFSConvertToShared( IN PERESOURCE Resource)
288 {
289
290     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
291                   AFS_TRACE_LEVEL_VERBOSE,
292                   "AFSConvertToShared Converting lock %08lX Thread %08lX\n",
293                   Resource,
294                   PsGetCurrentThread());
295
296     ExConvertExclusiveToSharedLite( Resource);
297
298     return;
299 }
300
301 //
302 // Function: AFSCompleteRequest
303 //
304 // Description:
305 //
306 //      This function completes irps
307 //
308 // Return:
309 //
310 //      A status is returned for the function
311 //
312
313 void
314 AFSCompleteRequest( IN PIRP Irp,
315                     IN ULONG Status)
316 {
317
318     Irp->IoStatus.Status = Status;
319
320     IoCompleteRequest( Irp,
321                        IO_NO_INCREMENT);
322
323     return;
324 }
325
326 //
327 // Function: AFSGenerateCRC
328 //
329 // Description:
330 //
331 //      Given a device and filename this function generates a CRC
332 //
333 // Return:
334 //
335 //      A status is returned for the function
336 //
337
338 ULONG
339 AFSGenerateCRC( IN PUNICODE_STRING FileName,
340                 IN BOOLEAN UpperCaseName)
341 {
342
343     ULONG ulCRC = 0;
344     NTSTATUS ntStatus = STATUS_SUCCESS;
345
346     ntStatus = RtlHashUnicodeString( FileName,
347                                      UpperCaseName,
348                                      HASH_STRING_ALGORITHM_DEFAULT,
349                                      &ulCRC);
350
351     if( !NT_SUCCESS( ntStatus))
352     {
353         ulCRC = 0;
354     }
355
356     return ulCRC;
357 }
358
359 void *
360 AFSLockSystemBuffer( IN PIRP Irp,
361                      IN ULONG Length)
362 {
363
364     NTSTATUS Status = STATUS_SUCCESS;
365     void *pAddress = NULL;
366
367     if( Irp->MdlAddress != NULL)
368     {
369
370         pAddress = MmGetSystemAddressForMdlSafe( Irp->MdlAddress,
371                                                  NormalPagePriority);
372     }
373     else if( Irp->AssociatedIrp.SystemBuffer != NULL)
374     {
375
376         pAddress = Irp->AssociatedIrp.SystemBuffer;
377     }
378     else if( Irp->UserBuffer != NULL)
379     {
380
381         Irp->MdlAddress = IoAllocateMdl( Irp->UserBuffer,
382                                          Length,
383                                          FALSE,
384                                          FALSE,
385                                          Irp);
386
387         if( Irp->MdlAddress != NULL)
388         {
389
390             //
391             //  Lock the new Mdl in memory.
392             //
393
394             __try
395             {
396                 PIO_STACK_LOCATION pIoStack;
397                 pIoStack = IoGetCurrentIrpStackLocation( Irp);
398
399
400                 MmProbeAndLockPages( Irp->MdlAddress, KernelMode,
401                                      (pIoStack->MajorFunction == IRP_MJ_READ) ? IoWriteAccess : IoReadAccess);
402
403                 pAddress = MmGetSystemAddressForMdlSafe( Irp->MdlAddress, NormalPagePriority );
404
405             }
406             __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
407             {
408
409                 IoFreeMdl( Irp->MdlAddress );
410                 Irp->MdlAddress = NULL;
411                 pAddress = NULL;
412             }
413         }
414     }
415
416     return pAddress;
417 }
418
419 void *
420 AFSLockUserBuffer( IN void *UserBuffer,
421                    IN ULONG BufferLength,
422                                    OUT MDL ** Mdl)
423 {
424
425     NTSTATUS ntStatus = STATUS_SUCCESS;
426     void *pAddress = NULL;
427     MDL *pMdl = NULL;
428
429     __Enter
430     {
431
432         pMdl = IoAllocateMdl( UserBuffer,
433                               BufferLength,
434                               FALSE,
435                               FALSE,
436                               NULL);
437
438             if( pMdl == NULL)
439             {
440
441                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
442             }
443
444         //
445         //  Lock the new Mdl in memory.
446         //
447
448         __try
449         {
450
451             MmProbeAndLockPages( pMdl,
452                                  KernelMode,
453                                  IoWriteAccess);
454
455             pAddress = MmGetSystemAddressForMdlSafe( pMdl,
456                                                      NormalPagePriority);
457         }
458         __except( AFSExceptionFilter( GetExceptionCode(), GetExceptionInformation()) )
459         {
460
461             IoFreeMdl( pMdl);
462             pMdl = NULL;
463             pAddress = NULL;
464         }
465
466         if( pMdl != NULL)
467         {
468
469             *Mdl = pMdl;
470         }
471
472 try_exit:
473
474         NOTHING;
475     }
476
477     return pAddress;
478 }
479
480 void *
481 AFSMapToService( IN PIRP Irp,
482                  IN ULONG ByteCount)
483 {
484
485     NTSTATUS ntStatus = STATUS_SUCCESS;
486     void *pMappedBuffer = NULL;
487     AFSDeviceExt *pDevExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
488     KAPC stApcState;
489
490     __Enter
491     {
492
493         if( pDevExt->Specific.Control.ServiceProcess == NULL)
494         {
495
496             try_return( ntStatus = STATUS_DEVICE_NOT_READY);
497         }
498
499         if( Irp->MdlAddress == NULL)
500         {
501
502             if( AFSLockSystemBuffer( Irp,
503                                      ByteCount) == NULL)
504             {
505
506                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
507             }
508         }
509
510         //
511         // Attach to the service process for mapping
512         //
513
514         KeStackAttachProcess( pDevExt->Specific.Control.ServiceProcess,
515                               (PRKAPC_STATE)&stApcState);
516
517         pMappedBuffer = MmMapLockedPagesSpecifyCache( Irp->MdlAddress,
518                                                       UserMode,
519                                                       MmCached,
520                                                       NULL,
521                                                       FALSE,
522                                                       NormalPagePriority);
523
524         KeUnstackDetachProcess( (PRKAPC_STATE)&stApcState);
525
526 try_exit:
527
528         NOTHING;
529     }
530
531     return pMappedBuffer;
532 }
533
534 NTSTATUS
535 AFSUnmapServiceMappedBuffer( IN void *MappedBuffer,
536                              IN PMDL Mdl)
537 {
538
539     NTSTATUS ntStatus = STATUS_SUCCESS;
540     void *pMappedBuffer = NULL;
541     AFSDeviceExt *pDevExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
542     KAPC stApcState;
543
544     __Enter
545     {
546
547         if( pDevExt->Specific.Control.ServiceProcess == NULL)
548         {
549
550             try_return( ntStatus = STATUS_DEVICE_NOT_READY);
551         }
552
553         if( Mdl != NULL)
554         {
555
556             //
557             // Attach to the service process for mapping
558             //
559
560             KeStackAttachProcess( pDevExt->Specific.Control.ServiceProcess,
561                                   (PRKAPC_STATE)&stApcState);
562
563             MmUnmapLockedPages( MappedBuffer,
564                                 Mdl);
565
566             KeUnstackDetachProcess( (PRKAPC_STATE)&stApcState);
567         }
568
569 try_exit:
570
571         NOTHING;
572     }
573
574     return ntStatus;
575 }
576
577 NTSTATUS
578 AFSInitializeLibraryDevice()
579 {
580
581     NTSTATUS ntStatus = STATUS_SUCCESS;
582     AFSDeviceExt *pDeviceExt = NULL;
583
584     __Enter
585     {
586
587         pDeviceExt = (AFSDeviceExt *)AFSLibraryDeviceObject->DeviceExtension;
588
589         //
590         // The PIOCtl file name
591         //
592
593         RtlInitUnicodeString( &AFSPIOCtlName,
594                               AFS_PIOCTL_FILE_INTERFACE_NAME);
595
596         //
597         // And the global root share name
598         //
599
600         RtlInitUnicodeString( &AFSGlobalRootName,
601                               AFS_GLOBAL_ROOT_SHARE_NAME);
602
603     }
604
605     return ntStatus;
606 }
607
608 NTSTATUS
609 AFSRemoveLibraryDevice()
610 {
611
612     NTSTATUS ntStatus = STATUS_SUCCESS;
613
614     __Enter
615     {
616
617     }
618
619     return ntStatus;
620 }
621
622 NTSTATUS
623 AFSDefaultDispatch( IN PDEVICE_OBJECT DeviceObject,
624                     IN PIRP Irp)
625 {
626
627     NTSTATUS            ntStatus = STATUS_INVALID_DEVICE_REQUEST;
628     PIO_STACK_LOCATION  pIrpSp = IoGetCurrentIrpStackLocation( Irp);
629
630     AFSCompleteRequest( Irp,
631                         ntStatus);
632
633     return ntStatus;
634 }
635
636 NTSTATUS
637 AFSInitializeGlobalDirectoryEntries()
638 {
639
640     NTSTATUS ntStatus = STATUS_SUCCESS;
641     AFSDirectoryCB *pDirNode = NULL;
642     ULONG ulEntryLength = 0;
643     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
644     AFSObjectInfoCB *pObjectInfoCB = NULL;
645     AFSNonPagedDirectoryCB *pNonPagedDirEntry = NULL;
646     LONG lCount;
647
648     __Enter
649     {
650
651         //
652         // Initialize the global . entry
653         //
654
655         pObjectInfoCB = AFSAllocateObjectInfo( &AFSGlobalRoot->ObjectInformation,
656                                                0);
657
658         if( pObjectInfoCB == NULL)
659         {
660
661             AFSDbgLogMsg( AFS_SUBSYSTEM_LOAD_LIBRARY | AFS_SUBSYSTEM_INIT_PROCESSING,
662                           AFS_TRACE_LEVEL_ERROR,
663                           "AFSInitializeGlobalDirectory AFSAllocateObjectInfo failure %08lX\n",
664                           ntStatus);
665
666             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
667         }
668
669         lCount = InterlockedIncrement( &pObjectInfoCB->ObjectReferenceCount);
670
671         AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
672                       AFS_TRACE_LEVEL_VERBOSE,
673                       "AFSInitializeGlobalDirectoryEntries Increment count on object %08lX Cnt %d\n",
674                       pObjectInfoCB,
675                       lCount);
676
677         ntStatus = STATUS_SUCCESS;
678
679         ulEntryLength = sizeof( AFSDirectoryCB) +
680                                      sizeof( WCHAR);
681
682         pDirNode = (AFSDirectoryCB *)AFSLibExAllocatePoolWithTag( PagedPool,
683                                                                   ulEntryLength,
684                                                                   AFS_DIR_ENTRY_TAG);
685
686         if( pDirNode == NULL)
687         {
688
689             AFSDeleteObjectInfo( pObjectInfoCB);
690
691             AFSDbgLogMsg( AFS_SUBSYSTEM_LOAD_LIBRARY | AFS_SUBSYSTEM_INIT_PROCESSING,
692                           AFS_TRACE_LEVEL_ERROR,
693                           "AFSInitializeGlobalDirectory AFS_DIR_ENTRY_TAG allocation failure\n");
694
695             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
696         }
697
698         pNonPagedDirEntry = (AFSNonPagedDirectoryCB *)AFSLibExAllocatePoolWithTag( NonPagedPool,
699                                                                                    sizeof( AFSNonPagedDirectoryCB),
700                                                                                    AFS_DIR_ENTRY_NP_TAG);
701
702         if( pNonPagedDirEntry == NULL)
703         {
704
705             ExFreePool( pDirNode);
706
707             AFSDeleteObjectInfo( pObjectInfoCB);
708
709             AFSDbgLogMsg( AFS_SUBSYSTEM_LOAD_LIBRARY | AFS_SUBSYSTEM_INIT_PROCESSING,
710                           AFS_TRACE_LEVEL_ERROR,
711                           "AFSInitializeGlobalDirectory AFS_DIR_ENTRY_NP_TAG allocation failure\n");
712
713             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
714         }
715
716         RtlZeroMemory( pDirNode,
717                        ulEntryLength);
718
719         RtlZeroMemory( pNonPagedDirEntry,
720                        sizeof( AFSNonPagedDirectoryCB));
721
722         ExInitializeResourceLite( &pNonPagedDirEntry->Lock);
723
724         pDirNode->NonPaged = pNonPagedDirEntry;
725
726         pDirNode->ObjectInformation = pObjectInfoCB;
727
728         //
729         // Set valid entry
730         //
731
732         SetFlag( pDirNode->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE | AFS_DIR_ENTRY_FAKE | AFS_DIR_ENTRY_VALID);
733
734         pDirNode->FileIndex = (ULONG)AFS_DIR_ENTRY_DOT_INDEX;
735
736         //
737         // Setup the names in the entry
738         //
739
740         pDirNode->NameInformation.FileName.Length = sizeof( WCHAR);
741
742         pDirNode->NameInformation.FileName.MaximumLength = sizeof( WCHAR);
743
744         pDirNode->NameInformation.FileName.Buffer = (WCHAR *)((char *)pDirNode + sizeof( AFSDirectoryCB));
745
746         pDirNode->NameInformation.FileName.Buffer[ 0] = L'.';
747
748         //
749         // Populate the rest of the data
750         //
751
752         pObjectInfoCB->FileType = AFS_FILE_TYPE_DIRECTORY;
753
754         pObjectInfoCB->FileAttributes = FILE_ATTRIBUTE_DIRECTORY;
755
756         AFSGlobalDotDirEntry = pDirNode;
757
758         //
759         // Now the .. entry
760         //
761
762         pObjectInfoCB = AFSAllocateObjectInfo( &AFSGlobalRoot->ObjectInformation,
763                                                0);
764
765         if( pObjectInfoCB == NULL)
766         {
767
768             AFSDbgLogMsg( AFS_SUBSYSTEM_LOAD_LIBRARY | AFS_SUBSYSTEM_INIT_PROCESSING,
769                           AFS_TRACE_LEVEL_ERROR,
770                           "AFSInitializeGlobalDirectory AFSAllocateObjectInfo (2) failure %08lX\n",
771                           ntStatus);
772
773             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
774         }
775
776         lCount = InterlockedIncrement( &pObjectInfoCB->ObjectReferenceCount);
777
778         AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
779                       AFS_TRACE_LEVEL_VERBOSE,
780                       "AFSInitializeGlobalDirectoryEntries Increment count on object %08lX Cnt %d\n",
781                       pObjectInfoCB,
782                       lCount);
783
784         ntStatus = STATUS_SUCCESS;
785
786         ulEntryLength = sizeof( AFSDirectoryCB) +
787                                      ( 2 * sizeof( WCHAR));
788
789         pDirNode = (AFSDirectoryCB *)AFSLibExAllocatePoolWithTag( PagedPool,
790                                                                   ulEntryLength,
791                                                                   AFS_DIR_ENTRY_TAG);
792
793         if( pDirNode == NULL)
794         {
795
796             AFSDeleteObjectInfo( pObjectInfoCB);
797
798             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
799         }
800
801         pNonPagedDirEntry = (AFSNonPagedDirectoryCB *)AFSLibExAllocatePoolWithTag( NonPagedPool,
802                                                                                    sizeof( AFSNonPagedDirectoryCB),
803                                                                                    AFS_DIR_ENTRY_NP_TAG);
804
805         if( pNonPagedDirEntry == NULL)
806         {
807
808             ExFreePool( pDirNode);
809
810             AFSDeleteObjectInfo( pObjectInfoCB);
811
812             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
813         }
814
815         RtlZeroMemory( pDirNode,
816                        ulEntryLength);
817
818         RtlZeroMemory( pNonPagedDirEntry,
819                        sizeof( AFSNonPagedDirectoryCB));
820
821         ExInitializeResourceLite( &pNonPagedDirEntry->Lock);
822
823         pDirNode->NonPaged = pNonPagedDirEntry;
824
825         pDirNode->ObjectInformation = pObjectInfoCB;
826
827         //
828         // Set valid entry
829         //
830
831         SetFlag( pDirNode->Flags, AFS_DIR_ENTRY_NOT_IN_PARENT_TREE | AFS_DIR_ENTRY_FAKE | AFS_DIR_ENTRY_VALID);
832
833         pDirNode->FileIndex = (ULONG)AFS_DIR_ENTRY_DOT_DOT_INDEX;
834
835         //
836         // Setup the names in the entry
837         //
838
839         pDirNode->NameInformation.FileName.Length = 2 * sizeof( WCHAR);
840
841         pDirNode->NameInformation.FileName.MaximumLength = 2 * sizeof( WCHAR);
842
843         pDirNode->NameInformation.FileName.Buffer = (WCHAR *)((char *)pDirNode + sizeof( AFSDirectoryCB));
844
845         pDirNode->NameInformation.FileName.Buffer[ 0] = L'.';
846
847         pDirNode->NameInformation.FileName.Buffer[ 1] = L'.';
848
849         //
850         // Populate the rest of the data
851         //
852
853         pObjectInfoCB->FileType = AFS_FILE_TYPE_DIRECTORY;
854
855         pObjectInfoCB->FileAttributes = FILE_ATTRIBUTE_DIRECTORY;
856
857         AFSGlobalDotDotDirEntry = pDirNode;
858
859 try_exit:
860
861         if( !NT_SUCCESS( ntStatus))
862         {
863
864             if( AFSGlobalDotDirEntry != NULL)
865             {
866
867                 AFSDeleteObjectInfo( AFSGlobalDotDirEntry->ObjectInformation);
868
869                 ExDeleteResourceLite( &AFSGlobalDotDirEntry->NonPaged->Lock);
870
871                 ExFreePool( AFSGlobalDotDirEntry->NonPaged);
872
873                 ExFreePool( AFSGlobalDotDirEntry);
874
875                 AFSGlobalDotDirEntry = NULL;
876             }
877
878             if( AFSGlobalDotDotDirEntry != NULL)
879             {
880
881                 AFSDeleteObjectInfo( AFSGlobalDotDotDirEntry->ObjectInformation);
882
883                 ExDeleteResourceLite( &AFSGlobalDotDotDirEntry->NonPaged->Lock);
884
885                 ExFreePool( AFSGlobalDotDotDirEntry->NonPaged);
886
887                 ExFreePool( AFSGlobalDotDotDirEntry);
888
889                 AFSGlobalDotDotDirEntry = NULL;
890             }
891         }
892     }
893
894     return ntStatus;
895 }
896
897 AFSDirectoryCB *
898 AFSInitDirEntry( IN AFSObjectInfoCB *ParentObjectInfo,
899                  IN PUNICODE_STRING FileName,
900                  IN PUNICODE_STRING TargetName,
901                  IN AFSDirEnumEntry *DirEnumEntry,
902                  IN ULONG FileIndex)
903 {
904
905     AFSDirectoryCB *pDirNode = NULL;
906     NTSTATUS ntStatus = STATUS_SUCCESS;
907     ULONG ulEntryLength = 0;
908     AFSDirEnumEntry *pDirEnumCB = NULL;
909     AFSFileID stTargetFileID;
910     AFSFcb *pVcb = NULL;
911     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
912     AFSObjectInfoCB *pObjectInfoCB = NULL;
913     BOOLEAN bAllocatedObjectCB = FALSE;
914     ULONGLONG ullIndex = 0;
915     AFSNonPagedDirectoryCB *pNonPagedDirEntry = NULL;
916     LONG lCount;
917
918     __Enter
919     {
920
921         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
922                       AFS_TRACE_LEVEL_VERBOSE,
923                       "AFSInitDirEntry Initializing entry %wZ parent FID %08lX-%08lX-%08lX-%08lX\n",
924                       FileName,
925                       ParentObjectInfo->FileId.Cell,
926                       ParentObjectInfo->FileId.Volume,
927                       ParentObjectInfo->FileId.Vnode,
928                       ParentObjectInfo->FileId.Unique);
929
930         //
931         // First thing is to locate/create our object information block
932         // for this entry
933         //
934
935         AFSAcquireExcl( ParentObjectInfo->VolumeCB->ObjectInfoTree.TreeLock,
936                         TRUE);
937
938         ullIndex = AFSCreateLowIndex( &DirEnumEntry->FileId);
939
940         ntStatus = AFSLocateHashEntry( ParentObjectInfo->VolumeCB->ObjectInfoTree.TreeHead,
941                                        ullIndex,
942                                        (AFSBTreeEntry **)&pObjectInfoCB);
943
944         if( !NT_SUCCESS( ntStatus) ||
945             pObjectInfoCB == NULL)
946         {
947
948             //
949             // Allocate our object info cb
950             //
951
952             pObjectInfoCB = AFSAllocateObjectInfo( ParentObjectInfo,
953                                                    ullIndex);
954
955             if( pObjectInfoCB == NULL)
956             {
957
958                 AFSReleaseResource( ParentObjectInfo->VolumeCB->ObjectInfoTree.TreeLock);
959
960                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
961             }
962
963             bAllocatedObjectCB = TRUE;
964
965             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
966                           AFS_TRACE_LEVEL_VERBOSE,
967                           "AFSInitDirEntry initialized object %08lX Parent Object %08lX for %wZ\n",
968                           pObjectInfoCB,
969                           ParentObjectInfo,
970                           FileName);
971         }
972
973         lCount = InterlockedIncrement( &pObjectInfoCB->ObjectReferenceCount);
974
975         AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
976                       AFS_TRACE_LEVEL_VERBOSE,
977                       "AFSInitDirEntry Increment count on object %08lX Cnt %d\n",
978                       pObjectInfoCB,
979                       lCount);
980
981         AFSReleaseResource( ParentObjectInfo->VolumeCB->ObjectInfoTree.TreeLock);
982
983         ntStatus = STATUS_SUCCESS;
984
985         ulEntryLength = sizeof( AFSDirectoryCB) +
986                                      FileName->Length;
987
988         if( TargetName != NULL)
989         {
990
991             ulEntryLength += TargetName->Length;
992         }
993
994         pDirNode = (AFSDirectoryCB *)AFSExAllocatePoolWithTag( PagedPool,
995                                                                ulEntryLength,
996                                                                AFS_DIR_ENTRY_TAG);
997
998         if( pDirNode == NULL)
999         {
1000
1001             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
1002         }
1003
1004         pNonPagedDirEntry = (AFSNonPagedDirectoryCB *)AFSExAllocatePoolWithTag( NonPagedPool,
1005                                                                                 sizeof( AFSNonPagedDirectoryCB),
1006                                                                                 AFS_DIR_ENTRY_NP_TAG);
1007
1008         if( pNonPagedDirEntry == NULL)
1009         {
1010
1011             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
1012         }
1013
1014         RtlZeroMemory( pDirNode,
1015                        ulEntryLength);
1016
1017         RtlZeroMemory( pNonPagedDirEntry,
1018                        sizeof( AFSNonPagedDirectoryCB));
1019
1020         ExInitializeResourceLite( &pNonPagedDirEntry->Lock);
1021
1022         pDirNode->NonPaged = pNonPagedDirEntry;
1023
1024         pDirNode->ObjectInformation = pObjectInfoCB;
1025
1026         //
1027         // Set valid entry and NOT_IN_PARENT flag
1028         //
1029
1030         SetFlag( pDirNode->Flags, AFS_DIR_ENTRY_VALID | AFS_DIR_ENTRY_NOT_IN_PARENT_TREE);
1031
1032         pDirNode->FileIndex = FileIndex;
1033
1034         //
1035         // Setup the names in the entry
1036         //
1037
1038         if( FileName->Length > 0)
1039         {
1040
1041             pDirNode->NameInformation.FileName.Length = FileName->Length;
1042
1043             pDirNode->NameInformation.FileName.MaximumLength = FileName->Length;
1044
1045             pDirNode->NameInformation.FileName.Buffer = (WCHAR *)((char *)pDirNode + sizeof( AFSDirectoryCB));
1046
1047             RtlCopyMemory( pDirNode->NameInformation.FileName.Buffer,
1048                            FileName->Buffer,
1049                            pDirNode->NameInformation.FileName.Length);
1050
1051             //
1052             // Create a CRC for the file
1053             //
1054
1055             pDirNode->CaseSensitiveTreeEntry.HashIndex = AFSGenerateCRC( &pDirNode->NameInformation.FileName,
1056                                                                          FALSE);
1057
1058             pDirNode->CaseInsensitiveTreeEntry.HashIndex = AFSGenerateCRC( &pDirNode->NameInformation.FileName,
1059                                                                            TRUE);
1060         }
1061
1062         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1063                       AFS_TRACE_LEVEL_VERBOSE,
1064                       "AFSInitDirEntry Initialized DE %p for %wZ in parent FID %08lX-%08lX-%08lX-%08lX\n",
1065                       pDirNode,
1066                       FileName,
1067                       ParentObjectInfo->FileId.Cell,
1068                       ParentObjectInfo->FileId.Volume,
1069                       ParentObjectInfo->FileId.Vnode,
1070                       ParentObjectInfo->FileId.Unique);
1071
1072         if( TargetName != NULL &&
1073             TargetName->Length > 0)
1074         {
1075
1076             pDirNode->NameInformation.TargetName.Length = TargetName->Length;
1077
1078             pDirNode->NameInformation.TargetName.MaximumLength = pDirNode->NameInformation.TargetName.Length;
1079
1080             pDirNode->NameInformation.TargetName.Buffer = (WCHAR *)((char *)pDirNode +
1081                                                                             sizeof( AFSDirectoryCB) +
1082                                                                             pDirNode->NameInformation.FileName.Length);
1083
1084             RtlCopyMemory( pDirNode->NameInformation.TargetName.Buffer,
1085                            TargetName->Buffer,
1086                            pDirNode->NameInformation.TargetName.Length);
1087         }
1088
1089         //
1090         // If we allocated the object information cb then update the information
1091         //
1092
1093         if( bAllocatedObjectCB)
1094         {
1095
1096             //
1097             // Populate the rest of the data
1098             //
1099
1100             pObjectInfoCB->FileId = DirEnumEntry->FileId;
1101
1102             pObjectInfoCB->TargetFileId = DirEnumEntry->TargetFileId;
1103
1104             pObjectInfoCB->FileType = DirEnumEntry->FileType;
1105
1106             pObjectInfoCB->CreationTime = DirEnumEntry->CreationTime;
1107
1108             pObjectInfoCB->LastAccessTime = DirEnumEntry->LastAccessTime;
1109
1110             pObjectInfoCB->LastWriteTime = DirEnumEntry->LastWriteTime;
1111
1112             pObjectInfoCB->ChangeTime = DirEnumEntry->ChangeTime;
1113
1114             pObjectInfoCB->EndOfFile = DirEnumEntry->EndOfFile;
1115
1116             pObjectInfoCB->AllocationSize = DirEnumEntry->AllocationSize;
1117
1118             pObjectInfoCB->FileAttributes = DirEnumEntry->FileAttributes;
1119
1120             if( pObjectInfoCB->FileType == AFS_FILE_TYPE_MOUNTPOINT)
1121             {
1122
1123                 pObjectInfoCB->FileAttributes = (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT);
1124             }
1125
1126             if (pObjectInfoCB->FileType == AFS_FILE_TYPE_SYMLINK ||
1127                 pObjectInfoCB->FileType == AFS_FILE_TYPE_DFSLINK)
1128             {
1129
1130                 pObjectInfoCB->FileAttributes = FILE_ATTRIBUTE_REPARSE_POINT;
1131             }
1132
1133             pObjectInfoCB->EaSize = DirEnumEntry->EaSize;
1134
1135             //
1136             // Object specific information
1137             //
1138
1139             pObjectInfoCB->Links = DirEnumEntry->Links;
1140
1141             pObjectInfoCB->Expiration = DirEnumEntry->Expiration;
1142
1143             pObjectInfoCB->DataVersion = DirEnumEntry->DataVersion;
1144
1145             //
1146             // Check for the case where we have a filetype of SymLink but both the TargetFid and the
1147             // TargetName are empty. In this case set the filetype to zero so we evaluate it later in
1148             // the code
1149             //
1150
1151             if( pObjectInfoCB->FileType == AFS_FILE_TYPE_SYMLINK &&
1152                 pObjectInfoCB->TargetFileId.Vnode == 0 &&
1153                 pObjectInfoCB->TargetFileId.Unique == 0 &&
1154                 pDirNode->NameInformation.TargetName.Length == 0)
1155             {
1156
1157                 //
1158                 // This will ensure we perform a validation on the node
1159                 //
1160
1161                 pObjectInfoCB->FileType = AFS_FILE_TYPE_UNKNOWN;
1162             }
1163
1164             if( pObjectInfoCB->FileType == AFS_FILE_TYPE_UNKNOWN)
1165             {
1166
1167                 SetFlag( pObjectInfoCB->Flags, AFS_OBJECT_FLAGS_NOT_EVALUATED);
1168             }
1169         }
1170
1171 try_exit:
1172
1173         if( !NT_SUCCESS( ntStatus))
1174         {
1175
1176             if( pNonPagedDirEntry != NULL)
1177             {
1178
1179                 ExDeleteResourceLite( &pNonPagedDirEntry->Lock);
1180
1181                 AFSExFreePool( pNonPagedDirEntry);
1182             }
1183
1184             if( pDirNode != NULL)
1185             {
1186
1187                 AFSExFreePool( pDirNode);
1188
1189                 pDirNode = NULL;
1190             }
1191
1192             //
1193             // Dereference our object info block if we have one
1194             //
1195
1196             if( pObjectInfoCB != NULL)
1197             {
1198
1199                 lCount = InterlockedDecrement( &pObjectInfoCB->ObjectReferenceCount);
1200
1201                 AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
1202                               AFS_TRACE_LEVEL_VERBOSE,
1203                               "AFSInitDirEntry Decrement count on object %08lX Cnt %d\n",
1204                               pObjectInfoCB,
1205                               lCount);
1206
1207                 if( bAllocatedObjectCB)
1208                 {
1209
1210                     ASSERT( pObjectInfoCB->ObjectReferenceCount == 0);
1211
1212                     AFSDeleteObjectInfo( pObjectInfoCB);
1213                 }
1214             }
1215         }
1216     }
1217
1218     return pDirNode;
1219 }
1220
1221 BOOLEAN
1222 AFSCheckForReadOnlyAccess( IN ACCESS_MASK DesiredAccess,
1223                            IN BOOLEAN DirectoryEntry)
1224 {
1225
1226     BOOLEAN bReturn = TRUE;
1227     ACCESS_MASK stAccessMask = 0;
1228
1229     //
1230     // Get rid of anything we don't know about
1231     //
1232
1233     DesiredAccess = (DesiredAccess   &
1234                           ( DELETE |
1235                             READ_CONTROL |
1236                             WRITE_OWNER |
1237                             WRITE_DAC |
1238                             SYNCHRONIZE |
1239                             ACCESS_SYSTEM_SECURITY |
1240                             FILE_WRITE_DATA |
1241                             FILE_READ_EA |
1242                             FILE_WRITE_EA |
1243                             FILE_READ_ATTRIBUTES |
1244                             FILE_WRITE_ATTRIBUTES |
1245                             FILE_LIST_DIRECTORY |
1246                             FILE_TRAVERSE |
1247                             FILE_DELETE_CHILD |
1248                             FILE_APPEND_DATA));
1249
1250     //
1251     // Our 'read only' access mask. These are the accesses we will
1252     // allow for a read only file
1253     //
1254
1255     stAccessMask = DELETE |
1256                         READ_CONTROL |
1257                         WRITE_OWNER |
1258                         WRITE_DAC |
1259                         SYNCHRONIZE |
1260                         ACCESS_SYSTEM_SECURITY |
1261                         FILE_READ_DATA |
1262                         FILE_READ_EA |
1263                         FILE_WRITE_EA |
1264                         FILE_READ_ATTRIBUTES |
1265                         FILE_WRITE_ATTRIBUTES |
1266                         FILE_EXECUTE |
1267                         FILE_LIST_DIRECTORY |
1268                         FILE_TRAVERSE;
1269
1270     //
1271     // For a directory, add in the directory specific accesses
1272     //
1273
1274     if( DirectoryEntry)
1275     {
1276
1277         stAccessMask |= FILE_ADD_SUBDIRECTORY |
1278                                 FILE_ADD_FILE |
1279                                 FILE_DELETE_CHILD;
1280     }
1281
1282     if( FlagOn( DesiredAccess, ~stAccessMask))
1283     {
1284
1285         //
1286         // A write access is set ...
1287         //
1288
1289         bReturn = FALSE;
1290     }
1291
1292     return bReturn;
1293 }
1294
1295 NTSTATUS
1296 AFSEvaluateNode( IN GUID *AuthGroup,
1297                  IN AFSDirectoryCB *DirEntry)
1298 {
1299
1300     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
1301     NTSTATUS ntStatus = STATUS_SUCCESS;
1302     AFSDirEnumEntry *pDirEntry = NULL;
1303     UNICODE_STRING uniTargetName;
1304
1305     __Enter
1306     {
1307
1308         ntStatus = AFSEvaluateTargetByID( DirEntry->ObjectInformation,
1309                                           AuthGroup,
1310                                           FALSE,
1311                                           &pDirEntry);
1312
1313         if( !NT_SUCCESS( ntStatus))
1314         {
1315
1316             try_return( ntStatus);
1317         }
1318
1319         DirEntry->ObjectInformation->TargetFileId = pDirEntry->TargetFileId;
1320
1321         DirEntry->ObjectInformation->Expiration = pDirEntry->Expiration;
1322
1323         DirEntry->ObjectInformation->DataVersion = pDirEntry->DataVersion;
1324
1325         DirEntry->ObjectInformation->FileType = pDirEntry->FileType;
1326
1327         DirEntry->ObjectInformation->CreationTime = pDirEntry->CreationTime;
1328
1329         DirEntry->ObjectInformation->LastAccessTime = pDirEntry->LastAccessTime;
1330
1331         DirEntry->ObjectInformation->LastWriteTime = pDirEntry->LastWriteTime;
1332
1333         DirEntry->ObjectInformation->ChangeTime = pDirEntry->ChangeTime;
1334
1335         DirEntry->ObjectInformation->EndOfFile = pDirEntry->EndOfFile;
1336
1337         DirEntry->ObjectInformation->AllocationSize = pDirEntry->AllocationSize;
1338
1339         DirEntry->ObjectInformation->FileAttributes = pDirEntry->FileAttributes;
1340
1341         if( pDirEntry->FileType == AFS_FILE_TYPE_MOUNTPOINT)
1342         {
1343
1344             DirEntry->ObjectInformation->FileAttributes = (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT);
1345         }
1346
1347         if( pDirEntry->FileType == AFS_FILE_TYPE_SYMLINK ||
1348             pDirEntry->FileType == AFS_FILE_TYPE_DFSLINK)
1349         {
1350
1351             DirEntry->ObjectInformation->FileAttributes = FILE_ATTRIBUTE_REPARSE_POINT;
1352         }
1353
1354         DirEntry->ObjectInformation->EaSize = pDirEntry->EaSize;
1355
1356         DirEntry->ObjectInformation->Links = pDirEntry->Links;
1357
1358         //
1359         // If we have a target name then see if it needs updating ...
1360         //
1361
1362         if( pDirEntry->TargetNameLength > 0)
1363         {
1364
1365             //
1366             // Update the target name information if needed
1367             //
1368
1369             uniTargetName.Length = (USHORT)pDirEntry->TargetNameLength;
1370
1371             uniTargetName.MaximumLength = uniTargetName.Length;
1372
1373             uniTargetName.Buffer = (WCHAR *)((char *)pDirEntry + pDirEntry->TargetNameOffset);
1374
1375             AFSAcquireExcl( &DirEntry->NonPaged->Lock,
1376                             TRUE);
1377
1378             if( DirEntry->NameInformation.TargetName.Length == 0 ||
1379                 RtlCompareUnicodeString( &uniTargetName,
1380                                          &DirEntry->NameInformation.TargetName,
1381                                          TRUE) != 0)
1382             {
1383
1384                 //
1385                 // Update the target name
1386                 //
1387
1388                 ntStatus = AFSUpdateTargetName( &DirEntry->NameInformation.TargetName,
1389                                                 &DirEntry->Flags,
1390                                                 uniTargetName.Buffer,
1391                                                 uniTargetName.Length);
1392
1393                 if( !NT_SUCCESS( ntStatus))
1394                 {
1395
1396                     AFSReleaseResource( &DirEntry->NonPaged->Lock);
1397
1398                     try_return( ntStatus);
1399                 }
1400             }
1401
1402             AFSReleaseResource( &DirEntry->NonPaged->Lock);
1403         }
1404
1405 try_exit:
1406
1407         if( pDirEntry != NULL)
1408         {
1409
1410             AFSExFreePool( pDirEntry);
1411         }
1412     }
1413
1414     return ntStatus;
1415 }
1416
1417 NTSTATUS
1418 AFSValidateSymLink( IN GUID *AuthGroup,
1419                     IN AFSDirectoryCB *DirEntry)
1420 {
1421
1422     AFSDeviceExt *pDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
1423     NTSTATUS ntStatus = STATUS_SUCCESS;
1424     AFSDirEnumEntry *pDirEntry = NULL;
1425     UNICODE_STRING uniTargetName;
1426
1427     __Enter
1428     {
1429
1430         ntStatus = AFSEvaluateTargetByID( DirEntry->ObjectInformation,
1431                                           AuthGroup,
1432                                           FALSE,
1433                                           &pDirEntry);
1434
1435         if( !NT_SUCCESS( ntStatus))
1436         {
1437
1438             try_return( ntStatus);
1439         }
1440
1441         if( pDirEntry->FileType == AFS_FILE_TYPE_UNKNOWN ||
1442             pDirEntry->FileType == AFS_FILE_TYPE_INVALID)
1443         {
1444
1445             try_return( ntStatus = STATUS_OBJECT_NAME_NOT_FOUND);
1446         }
1447
1448         DirEntry->ObjectInformation->TargetFileId = pDirEntry->TargetFileId;
1449
1450         DirEntry->ObjectInformation->Expiration = pDirEntry->Expiration;
1451
1452         DirEntry->ObjectInformation->DataVersion = pDirEntry->DataVersion;
1453
1454         //
1455         // Update the target name information if needed
1456         //
1457
1458         uniTargetName.Length = (USHORT)pDirEntry->TargetNameLength;
1459
1460         uniTargetName.MaximumLength = uniTargetName.Length;
1461
1462         uniTargetName.Buffer = (WCHAR *)((char *)pDirEntry + pDirEntry->TargetNameOffset);
1463
1464         if( uniTargetName.Length > 0)
1465         {
1466
1467             AFSAcquireExcl( &DirEntry->NonPaged->Lock,
1468                             TRUE);
1469
1470             if( DirEntry->NameInformation.TargetName.Length == 0 ||
1471                 RtlCompareUnicodeString( &uniTargetName,
1472                                          &DirEntry->NameInformation.TargetName,
1473                                          TRUE) != 0)
1474             {
1475
1476                 //
1477                 // Update the target name
1478                 //
1479
1480                 ntStatus = AFSUpdateTargetName( &DirEntry->NameInformation.TargetName,
1481                                                 &DirEntry->Flags,
1482                                                 uniTargetName.Buffer,
1483                                                 uniTargetName.Length);
1484
1485                 if( !NT_SUCCESS( ntStatus))
1486                 {
1487
1488                     AFSReleaseResource( &DirEntry->NonPaged->Lock);
1489
1490                     try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
1491                 }
1492             }
1493
1494             AFSReleaseResource( &DirEntry->NonPaged->Lock);
1495         }
1496
1497         //
1498         // If the FileType is the same then nothing to do since it IS
1499         // a SymLink
1500         //
1501
1502         if( pDirEntry->FileType == DirEntry->ObjectInformation->FileType)
1503         {
1504
1505             ASSERT( pDirEntry->FileType == AFS_FILE_TYPE_SYMLINK);
1506
1507             try_return( ntStatus = STATUS_SUCCESS);
1508         }
1509
1510         DirEntry->ObjectInformation->FileType = pDirEntry->FileType;
1511
1512         DirEntry->ObjectInformation->CreationTime = pDirEntry->CreationTime;
1513
1514         DirEntry->ObjectInformation->LastAccessTime = pDirEntry->LastAccessTime;
1515
1516         DirEntry->ObjectInformation->LastWriteTime = pDirEntry->LastWriteTime;
1517
1518         DirEntry->ObjectInformation->ChangeTime = pDirEntry->ChangeTime;
1519
1520         DirEntry->ObjectInformation->EndOfFile = pDirEntry->EndOfFile;
1521
1522         DirEntry->ObjectInformation->AllocationSize = pDirEntry->AllocationSize;
1523
1524         DirEntry->ObjectInformation->FileAttributes = pDirEntry->FileAttributes;
1525
1526         if( pDirEntry->FileType == AFS_FILE_TYPE_MOUNTPOINT)
1527         {
1528
1529             DirEntry->ObjectInformation->FileAttributes = (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT);
1530         }
1531
1532         if( pDirEntry->FileType == AFS_FILE_TYPE_SYMLINK ||
1533             pDirEntry->FileType == AFS_FILE_TYPE_DFSLINK)
1534         {
1535
1536             DirEntry->ObjectInformation->FileAttributes = FILE_ATTRIBUTE_REPARSE_POINT;
1537         }
1538
1539         DirEntry->ObjectInformation->EaSize = pDirEntry->EaSize;
1540
1541         DirEntry->ObjectInformation->Links = pDirEntry->Links;
1542
1543 try_exit:
1544
1545         if( pDirEntry != NULL)
1546         {
1547
1548             AFSExFreePool( pDirEntry);
1549         }
1550     }
1551
1552     return ntStatus;
1553 }
1554
1555 NTSTATUS
1556 AFSInvalidateObject( IN OUT AFSObjectInfoCB **ppObjectInfo,
1557                      IN     ULONG Reason)
1558 {
1559
1560     NTSTATUS ntStatus = STATUS_SUCCESS;
1561     IO_STATUS_BLOCK stIoStatus;
1562     ULONG ulFilter = 0;
1563
1564     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1565                   AFS_TRACE_LEVEL_VERBOSE,
1566                   "AFSInvalidateObject Invalidation on node type %d for fid %08lX-%08lX-%08lX-%08lX Reason %d\n",
1567                   (*ppObjectInfo)->FileType,
1568                   (*ppObjectInfo)->FileId.Cell,
1569                   (*ppObjectInfo)->FileId.Volume,
1570                   (*ppObjectInfo)->FileId.Vnode,
1571                   (*ppObjectInfo)->FileId.Unique,
1572                   Reason);
1573
1574     if( (*ppObjectInfo)->FileType == AFS_FILE_TYPE_SYMLINK ||
1575         (*ppObjectInfo)->FileType == AFS_FILE_TYPE_DFSLINK ||
1576         (*ppObjectInfo)->FileType == AFS_FILE_TYPE_MOUNTPOINT)
1577     {
1578         //
1579         // We only act on the mount point itself, not the target. If the
1580         // node has been deleted then mark it as such otherwise indicate
1581         // it requires verification
1582         //
1583
1584         if( Reason == AFS_INVALIDATE_DELETED)
1585         {
1586             SetFlag( (*ppObjectInfo)->Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID);
1587         }
1588         else
1589         {
1590
1591             if( Reason == AFS_INVALIDATE_FLUSHED)
1592             {
1593
1594                 (*ppObjectInfo)->DataVersion.QuadPart = (ULONGLONG)-1;
1595
1596                 SetFlag( (*ppObjectInfo)->Flags, AFS_OBJECT_FLAGS_VERIFY_DATA);
1597             }
1598
1599             (*ppObjectInfo)->Expiration.QuadPart = 0;
1600
1601             (*ppObjectInfo)->TargetFileId.Vnode = 0;
1602
1603             (*ppObjectInfo)->TargetFileId.Unique = 0;
1604
1605             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1606                           AFS_TRACE_LEVEL_VERBOSE,
1607                           "AFSInvalidateObject Setting VERIFY flag on fid %08lX-%08lX-%08lX-%08lX\n",
1608                           (*ppObjectInfo)->FileId.Cell,
1609                           (*ppObjectInfo)->FileId.Volume,
1610                           (*ppObjectInfo)->FileId.Vnode,
1611                           (*ppObjectInfo)->FileId.Unique);
1612
1613             SetFlag( (*ppObjectInfo)->Flags, AFS_OBJECT_FLAGS_VERIFY);
1614         }
1615
1616         ulFilter = FILE_NOTIFY_CHANGE_FILE_NAME;
1617
1618         if( Reason == AFS_INVALIDATE_CREDS)
1619         {
1620             ulFilter |= FILE_NOTIFY_CHANGE_SECURITY;
1621         }
1622
1623         if( Reason == AFS_INVALIDATE_DATA_VERSION ||
1624             Reason == AFS_INVALIDATE_FLUSHED)
1625         {
1626             ulFilter |= FILE_NOTIFY_CHANGE_SIZE | FILE_NOTIFY_CHANGE_LAST_WRITE;
1627         }
1628         else
1629         {
1630             ulFilter |= FILE_NOTIFY_CHANGE_ATTRIBUTES;
1631         }
1632
1633         AFSFsRtlNotifyFullReportChange( (*ppObjectInfo)->ParentObjectInformation,
1634                                         NULL,
1635                                         ulFilter,
1636                                         FILE_ACTION_MODIFIED);
1637
1638         try_return( ntStatus);
1639     }
1640
1641     //
1642     // Depending on the reason for invalidation then perform work on the node
1643     //
1644
1645     switch( Reason)
1646     {
1647
1648     case AFS_INVALIDATE_DELETED:
1649         {
1650
1651             //
1652             // Mark this node as invalid
1653             //
1654
1655             SetFlag( (*ppObjectInfo)->Flags, AFS_OBJECT_FLAGS_DELETED);
1656
1657             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1658                           AFS_TRACE_LEVEL_VERBOSE,
1659                           "AFSInvalidateObject Set DELETE flag on fid %08lX-%08lX-%08lX-%08lX\n",
1660                           (*ppObjectInfo)->FileId.Cell,
1661                           (*ppObjectInfo)->FileId.Volume,
1662                           (*ppObjectInfo)->FileId.Vnode,
1663                           (*ppObjectInfo)->FileId.Unique);
1664
1665             if( (*ppObjectInfo)->ParentObjectInformation != NULL)
1666             {
1667
1668                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1669                               AFS_TRACE_LEVEL_VERBOSE,
1670                               "AFSInvalidateObject Set VERIFY flag on parent fid %08lX-%08lX-%08lX-%08lX\n",
1671                               (*ppObjectInfo)->ParentObjectInformation->FileId.Cell,
1672                               (*ppObjectInfo)->ParentObjectInformation->FileId.Volume,
1673                               (*ppObjectInfo)->ParentObjectInformation->FileId.Vnode,
1674                               (*ppObjectInfo)->ParentObjectInformation->FileId.Unique);
1675
1676                 SetFlag( (*ppObjectInfo)->ParentObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY);
1677
1678                 (*ppObjectInfo)->ParentObjectInformation->DataVersion.QuadPart = (ULONGLONG)-1;
1679
1680                 (*ppObjectInfo)->ParentObjectInformation->Expiration.QuadPart = 0;
1681             }
1682
1683             if( (*ppObjectInfo)->FileType == AFS_FILE_TYPE_DIRECTORY)
1684             {
1685                 ulFilter = FILE_NOTIFY_CHANGE_DIR_NAME;
1686             }
1687             else
1688             {
1689                 ulFilter = FILE_NOTIFY_CHANGE_FILE_NAME;
1690             }
1691
1692             AFSFsRtlNotifyFullReportChange( (*ppObjectInfo)->ParentObjectInformation,
1693                                             NULL,
1694                                             ulFilter,
1695                                             FILE_ACTION_REMOVED);
1696
1697             if( NT_SUCCESS( AFSQueueInvalidateObject( (*ppObjectInfo),
1698                                                       Reason)))
1699             {
1700                 (*ppObjectInfo) = NULL; // We'll dec the count in the worker item
1701             }
1702
1703             break;
1704         }
1705
1706     case AFS_INVALIDATE_FLUSHED:
1707         {
1708
1709             if( (*ppObjectInfo)->FileType == AFS_FILE_TYPE_FILE &&
1710                 (*ppObjectInfo)->Fcb != NULL)
1711             {
1712
1713                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1714                               AFS_TRACE_LEVEL_VERBOSE,
1715                               "AFSInvalidateObject Flush/purge file fid %08lX-%08lX-%08lX-%08lX\n",
1716                               (*ppObjectInfo)->FileId.Cell,
1717                               (*ppObjectInfo)->FileId.Volume,
1718                               (*ppObjectInfo)->FileId.Vnode,
1719                               (*ppObjectInfo)->FileId.Unique);
1720
1721                 AFSAcquireExcl( &(*ppObjectInfo)->Fcb->NPFcb->Resource,
1722                                 TRUE);
1723
1724                 __try
1725                 {
1726
1727                     CcFlushCache( &(*ppObjectInfo)->Fcb->NPFcb->SectionObjectPointers,
1728                                   NULL,
1729                                   0,
1730                                   &stIoStatus);
1731
1732                     if( !NT_SUCCESS( stIoStatus.Status))
1733                     {
1734
1735                         AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
1736                                       AFS_TRACE_LEVEL_ERROR,
1737                                       "AFSInvalidateObject CcFlushCache failure FID %08lX-%08lX-%08lX-%08lX Status 0x%08lX Bytes 0x%08lX\n",
1738                                       (*ppObjectInfo)->FileId.Cell,
1739                                       (*ppObjectInfo)->FileId.Volume,
1740                                       (*ppObjectInfo)->FileId.Vnode,
1741                                       (*ppObjectInfo)->FileId.Unique,
1742                                       stIoStatus.Status,
1743                                       stIoStatus.Information);
1744
1745                         ntStatus = stIoStatus.Status;
1746                     }
1747
1748                     CcPurgeCacheSection( &(*ppObjectInfo)->Fcb->NPFcb->SectionObjectPointers,
1749                                          NULL,
1750                                          0,
1751                                          FALSE);
1752                 }
1753                 __except( EXCEPTION_EXECUTE_HANDLER)
1754                 {
1755
1756                     ntStatus = GetExceptionCode();
1757                 }
1758
1759                 AFSReleaseResource( &(*ppObjectInfo)->Fcb->NPFcb->Resource);
1760
1761                 //
1762                 // Clear out the extents
1763                 // Get rid of them (note this involves waiting
1764                 // for any writes or reads to the cache to complete)
1765                 //
1766
1767                 (VOID) AFSTearDownFcbExtents( (*ppObjectInfo)->Fcb,
1768                                               NULL);
1769             }
1770
1771             (*ppObjectInfo)->DataVersion.QuadPart = (ULONGLONG)-1;
1772
1773
1774             if( (*ppObjectInfo)->FileType == AFS_FILE_TYPE_FILE)
1775             {
1776
1777                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1778                               AFS_TRACE_LEVEL_VERBOSE,
1779                               "AFSInvalidateObject Setting VERIFY_DATA flag on fid %08lX-%08lX-%08lX-%08lX\n",
1780                               (*ppObjectInfo)->FileId.Cell,
1781                               (*ppObjectInfo)->FileId.Volume,
1782                               (*ppObjectInfo)->FileId.Vnode,
1783                               (*ppObjectInfo)->FileId.Unique);
1784
1785                 SetFlag( (*ppObjectInfo)->Flags, AFS_OBJECT_FLAGS_VERIFY_DATA);
1786             }
1787
1788             // Fall through to the default processing
1789         }
1790
1791     default:
1792         {
1793
1794             if( (*ppObjectInfo)->FileType == AFS_FILE_TYPE_DIRECTORY)
1795             {
1796                 ulFilter = FILE_NOTIFY_CHANGE_DIR_NAME;
1797             }
1798             else
1799             {
1800                 ulFilter = FILE_NOTIFY_CHANGE_FILE_NAME;
1801             }
1802
1803             if( Reason == AFS_INVALIDATE_CREDS)
1804             {
1805                 ulFilter |= FILE_NOTIFY_CHANGE_SECURITY;
1806             }
1807
1808             if( Reason == AFS_INVALIDATE_DATA_VERSION)
1809             {
1810                 ulFilter |= FILE_NOTIFY_CHANGE_SIZE | FILE_NOTIFY_CHANGE_LAST_WRITE;
1811             }
1812             else
1813             {
1814                 ulFilter |= FILE_NOTIFY_CHANGE_ATTRIBUTES;
1815             }
1816
1817             AFSFsRtlNotifyFullReportChange( (*ppObjectInfo)->ParentObjectInformation,
1818                                             NULL,
1819                                             ulFilter,
1820                                             FILE_ACTION_MODIFIED);
1821
1822             //
1823             // Indicate this node requires re-evaluation for the remaining reasons
1824             //
1825
1826             (*ppObjectInfo)->Expiration.QuadPart = 0;
1827
1828             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1829                           AFS_TRACE_LEVEL_VERBOSE,
1830                           "AFSInvalidateObject Setting VERIFY flag on fid %08lX-%08lX-%08lX-%08lX\n",
1831                           (*ppObjectInfo)->FileId.Cell,
1832                           (*ppObjectInfo)->FileId.Volume,
1833                           (*ppObjectInfo)->FileId.Vnode,
1834                           (*ppObjectInfo)->FileId.Unique);
1835
1836             SetFlag( (*ppObjectInfo)->Flags, AFS_OBJECT_FLAGS_VERIFY);
1837
1838             if( Reason == AFS_INVALIDATE_DATA_VERSION ||
1839                 (*ppObjectInfo)->FileType == AFS_FILE_TYPE_FILE &&
1840                 ( Reason == AFS_INVALIDATE_CALLBACK ||
1841                   Reason == AFS_INVALIDATE_EXPIRED))
1842             {
1843                 if ( NT_SUCCESS( AFSQueueInvalidateObject( (*ppObjectInfo),
1844                                                            AFS_INVALIDATE_DATA_VERSION)))
1845                 {
1846
1847                     (*ppObjectInfo) = NULL; // We'll dec the count in the worker item
1848                 }
1849             }
1850
1851             break;
1852         }
1853     }
1854
1855   try_exit:
1856
1857     return ntStatus;
1858 }
1859
1860 NTSTATUS
1861 AFSInvalidateCache( IN AFSInvalidateCacheCB *InvalidateCB)
1862 {
1863
1864     NTSTATUS ntStatus = STATUS_SUCCESS;
1865     AFSFcb      *pDcb = NULL, *pFcb = NULL, *pNextFcb = NULL;
1866     AFSVolumeCB *pVolumeCB = NULL;
1867     AFSFcb      *pTargetDcb = NULL;
1868     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
1869     AFSDirectoryCB *pCurrentDirEntry = NULL;
1870     BOOLEAN     bIsChild = FALSE;
1871     ULONGLONG   ullIndex = 0;
1872     AFSObjectInfoCB *pObjectInfo = NULL;
1873     LONG lCount;
1874
1875     __Enter
1876     {
1877
1878         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1879                       AFS_TRACE_LEVEL_VERBOSE,
1880                       "AFSInvalidateCache Invalidation FID %08lX-%08lX-%08lX-%08lX Type %d WholeVolume %d Reason %d\n",
1881                       InvalidateCB->FileID.Cell,
1882                       InvalidateCB->FileID.Volume,
1883                       InvalidateCB->FileID.Vnode,
1884                       InvalidateCB->FileID.Unique,
1885                       InvalidateCB->FileType,
1886                       InvalidateCB->WholeVolume,
1887                       InvalidateCB->Reason);
1888
1889         //
1890         // Need to locate the Fcb for the directory to purge
1891         //
1892
1893         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
1894                       AFS_TRACE_LEVEL_VERBOSE,
1895                       "AFSInvalidateCache Acquiring RDR VolumeTreeLock lock %08lX SHARED %08lX\n",
1896                       &pDevExt->Specific.RDR.VolumeTreeLock,
1897                       PsGetCurrentThread());
1898
1899         //
1900         // Starve any exclusive waiters on this paticular call
1901         //
1902
1903         AFSAcquireSharedStarveExclusive( &pDevExt->Specific.RDR.VolumeTreeLock, TRUE);
1904
1905         //
1906         // Locate the volume node
1907         //
1908
1909         ullIndex = AFSCreateHighIndex( &InvalidateCB->FileID);
1910
1911         ntStatus = AFSLocateHashEntry( pDevExt->Specific.RDR.VolumeTree.TreeHead,
1912                                        ullIndex,
1913                                        (AFSBTreeEntry **)&pVolumeCB);
1914
1915         if( pVolumeCB != NULL)
1916         {
1917
1918             lCount = InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
1919
1920             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
1921                           AFS_TRACE_LEVEL_VERBOSE,
1922                           "AFSInvalidateCache Increment count on volume %08lX Cnt %d\n",
1923                           pVolumeCB,
1924                           lCount);
1925         }
1926
1927         AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
1928
1929         if( !NT_SUCCESS( ntStatus) ||
1930             pVolumeCB == NULL)
1931         {
1932
1933             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
1934                           AFS_TRACE_LEVEL_WARNING,
1935                           "AFSInvalidateCache Invalidation FAILURE Unable to locate volume node FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
1936                           InvalidateCB->FileID.Cell,
1937                           InvalidateCB->FileID.Volume,
1938                           InvalidateCB->FileID.Vnode,
1939                           InvalidateCB->FileID.Unique,
1940                           ntStatus);
1941
1942             try_return( ntStatus = STATUS_SUCCESS);
1943         }
1944
1945         //
1946         // If this is a whole volume invalidation then go do it now
1947         //
1948
1949         if( InvalidateCB->WholeVolume)
1950         {
1951
1952             ntStatus = AFSInvalidateVolume( pVolumeCB,
1953                                             InvalidateCB->Reason);
1954
1955             lCount = InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
1956
1957             try_return( ntStatus);
1958         }
1959
1960         AFSAcquireShared( pVolumeCB->ObjectInfoTree.TreeLock,
1961                           TRUE);
1962
1963         if ( AFSIsVolumeFID( &InvalidateCB->FileID))
1964         {
1965
1966             pObjectInfo = &pVolumeCB->ObjectInformation;
1967         }
1968         else
1969         {
1970
1971             lCount = InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
1972
1973             AFSDbgLogMsg( AFS_SUBSYSTEM_VOLUME_REF_COUNTING,
1974                           AFS_TRACE_LEVEL_VERBOSE,
1975                           "AFSInvalidateCache Decrement count on volume %08lX Cnt %d\n",
1976                           pVolumeCB,
1977                           pVolumeCB->VolumeReferenceCount);
1978
1979             ullIndex = AFSCreateLowIndex( &InvalidateCB->FileID);
1980
1981             ntStatus = AFSLocateHashEntry( pVolumeCB->ObjectInfoTree.TreeHead,
1982                                            ullIndex,
1983                                            (AFSBTreeEntry **)&pObjectInfo);
1984         }
1985
1986         if( pObjectInfo != NULL)
1987         {
1988
1989             //
1990             // Reference the node so it won't be torn down
1991             //
1992
1993             lCount = InterlockedIncrement( &pObjectInfo->ObjectReferenceCount);
1994
1995             AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
1996                           AFS_TRACE_LEVEL_VERBOSE,
1997                           "AFSInvalidateCache Increment count on object %08lX Cnt %d\n",
1998                           pObjectInfo,
1999                           lCount);
2000         }
2001
2002         AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
2003
2004         if( !NT_SUCCESS( ntStatus) ||
2005             pObjectInfo == NULL)
2006         {
2007
2008             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2009                           AFS_TRACE_LEVEL_WARNING,
2010                           "AFSInvalidateCache Invalidation FAILURE Unable to locate object FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
2011                           InvalidateCB->FileID.Cell,
2012                           InvalidateCB->FileID.Volume,
2013                           InvalidateCB->FileID.Vnode,
2014                           InvalidateCB->FileID.Unique,
2015                           ntStatus);
2016
2017             try_return( ntStatus = STATUS_SUCCESS);
2018         }
2019
2020         AFSInvalidateObject( &pObjectInfo,
2021                              InvalidateCB->Reason);
2022
2023 try_exit:
2024
2025         if( pObjectInfo != NULL)
2026         {
2027
2028             lCount = InterlockedDecrement( &pObjectInfo->ObjectReferenceCount);
2029
2030             AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2031                           AFS_TRACE_LEVEL_VERBOSE,
2032                           "AFSInvalidateCache Decrement count on object %08lX Cnt %d\n",
2033                           pObjectInfo,
2034                           lCount);
2035         }
2036     }
2037
2038     return ntStatus;
2039 }
2040
2041 BOOLEAN
2042 AFSIsChildOfParent( IN AFSFcb *Dcb,
2043                     IN AFSFcb *Fcb)
2044 {
2045
2046     BOOLEAN bIsChild = FALSE;
2047     AFSFcb *pCurrentFcb = Fcb;
2048
2049     while( pCurrentFcb != NULL)
2050     {
2051
2052         if( pCurrentFcb->ObjectInformation->ParentObjectInformation == Dcb->ObjectInformation)
2053         {
2054
2055             bIsChild = TRUE;
2056
2057             break;
2058         }
2059
2060         pCurrentFcb = pCurrentFcb->ObjectInformation->ParentObjectInformation->Fcb;
2061     }
2062
2063     return bIsChild;
2064 }
2065
2066 inline
2067 ULONGLONG
2068 AFSCreateHighIndex( IN AFSFileID *FileID)
2069 {
2070
2071     ULONGLONG ullIndex = 0;
2072
2073     ullIndex = (((ULONGLONG)FileID->Cell << 32) | FileID->Volume);
2074
2075     return ullIndex;
2076 }
2077
2078 inline
2079 ULONGLONG
2080 AFSCreateLowIndex( IN AFSFileID *FileID)
2081 {
2082
2083     ULONGLONG ullIndex = 0;
2084
2085     ullIndex = (((ULONGLONG)FileID->Vnode << 32) | FileID->Unique);
2086
2087     return ullIndex;
2088 }
2089
2090 BOOLEAN
2091 AFSCheckAccess( IN ACCESS_MASK DesiredAccess,
2092                 IN ACCESS_MASK GrantedAccess,
2093                 IN BOOLEAN DirectoryEntry)
2094 {
2095
2096     BOOLEAN bAccessGranted = TRUE;
2097
2098     //
2099     // Check if we are asking for read/write and granted only read only
2100     // NOTE: There will be more checks here
2101     //
2102
2103     if( !AFSCheckForReadOnlyAccess( DesiredAccess,
2104                                     DirectoryEntry) &&
2105         AFSCheckForReadOnlyAccess( GrantedAccess,
2106                                    DirectoryEntry))
2107     {
2108
2109         bAccessGranted = FALSE;
2110     }
2111
2112     return bAccessGranted;
2113 }
2114
2115 NTSTATUS
2116 AFSGetDriverStatus( IN AFSDriverStatusRespCB *DriverStatus)
2117 {
2118
2119     NTSTATUS         ntStatus = STATUS_SUCCESS;
2120     AFSDeviceExt    *pControlDevExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
2121
2122     //
2123     // Start with read
2124     //
2125
2126     DriverStatus->Status = AFS_DRIVER_STATUS_READY;
2127
2128     if( AFSGlobalRoot == NULL)
2129     {
2130
2131         //
2132         // We are not ready
2133         //
2134
2135         DriverStatus->Status = AFS_DRIVER_STATUS_NOT_READY;
2136     }
2137
2138     if( pControlDevExt->Specific.Control.CommServiceCB.IrpPoolControlFlag != POOL_ACTIVE)
2139     {
2140
2141         //
2142         // No service yet
2143         //
2144
2145         DriverStatus->Status = AFS_DRIVER_STATUS_NO_SERVICE;
2146     }
2147
2148     return ntStatus;
2149 }
2150
2151 NTSTATUS
2152 AFSSubstituteSysName( IN UNICODE_STRING *ComponentName,
2153                       IN UNICODE_STRING *SubstituteName,
2154                       IN ULONG StringIndex)
2155 {
2156
2157     NTSTATUS ntStatus = STATUS_SUCCESS;
2158     AFSDeviceExt    *pControlDevExt = (AFSDeviceExt *)AFSControlDeviceObject->DeviceExtension;
2159     AFSSysNameCB    *pSysName = NULL;
2160     ERESOURCE       *pSysNameLock = NULL;
2161     ULONG            ulIndex = 1;
2162     USHORT           usIndex = 0;
2163     UNICODE_STRING   uniSysName;
2164
2165     __Enter
2166     {
2167
2168 #if defined(_WIN64)
2169
2170         if( IoIs32bitProcess( NULL))
2171         {
2172
2173             pSysNameLock = &pControlDevExt->Specific.Control.SysName32ListLock;
2174
2175             pSysName = pControlDevExt->Specific.Control.SysName32ListHead;
2176         }
2177         else
2178         {
2179
2180             pSysNameLock = &pControlDevExt->Specific.Control.SysName64ListLock;
2181
2182             pSysName = pControlDevExt->Specific.Control.SysName64ListHead;
2183         }
2184 #else
2185
2186         pSysNameLock = &pControlDevExt->Specific.Control.SysName32ListLock;
2187
2188         pSysName = pControlDevExt->Specific.Control.SysName32ListHead;
2189
2190 #endif
2191
2192         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
2193                       AFS_TRACE_LEVEL_VERBOSE,
2194                       "AFSSubstituteSysName Acquiring SysName lock %08lX SHARED %08lX\n",
2195                       pSysNameLock,
2196                       PsGetCurrentThread());
2197
2198         AFSAcquireShared( pSysNameLock,
2199                           TRUE);
2200
2201         //
2202         // Find where we are in the list
2203         //
2204
2205         while( pSysName != NULL &&
2206             ulIndex < StringIndex)
2207         {
2208
2209             pSysName = pSysName->fLink;
2210
2211             ulIndex++;
2212         }
2213
2214         if( pSysName == NULL)
2215         {
2216
2217             try_return( ntStatus = STATUS_OBJECT_NAME_NOT_FOUND);
2218         }
2219
2220         RtlInitUnicodeString( &uniSysName,
2221                               L"@SYS");
2222         //
2223         // If it is a full component of @SYS then just substitue the
2224         // name in
2225         //
2226
2227         if( RtlCompareUnicodeString( &uniSysName,
2228                                      ComponentName,
2229                                      TRUE) == 0)
2230         {
2231
2232             SubstituteName->Length = pSysName->SysName.Length;
2233             SubstituteName->MaximumLength = SubstituteName->Length;
2234
2235             SubstituteName->Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
2236                                                                         SubstituteName->Length,
2237                                                                         AFS_SUBST_BUFFER_TAG);
2238
2239             if( SubstituteName->Buffer == NULL)
2240             {
2241
2242                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2243             }
2244
2245             RtlCopyMemory( SubstituteName->Buffer,
2246                            pSysName->SysName.Buffer,
2247                            pSysName->SysName.Length);
2248         }
2249         else
2250         {
2251
2252             usIndex = 0;
2253
2254             while( ComponentName->Buffer[ usIndex] != L'@')
2255             {
2256
2257                 usIndex++;
2258             }
2259
2260             SubstituteName->Length = (usIndex * sizeof( WCHAR)) + pSysName->SysName.Length;
2261             SubstituteName->MaximumLength = SubstituteName->Length;
2262
2263             SubstituteName->Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
2264                                                                         SubstituteName->Length,
2265                                                                         AFS_SUBST_BUFFER_TAG);
2266
2267             if( SubstituteName->Buffer == NULL)
2268             {
2269
2270                 try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2271             }
2272
2273             RtlCopyMemory( SubstituteName->Buffer,
2274                            ComponentName->Buffer,
2275                            usIndex * sizeof( WCHAR));
2276
2277             RtlCopyMemory( &SubstituteName->Buffer[ usIndex],
2278                            pSysName->SysName.Buffer,
2279                            pSysName->SysName.Length);
2280         }
2281
2282 try_exit:
2283
2284         AFSReleaseResource( pSysNameLock);
2285     }
2286
2287     return ntStatus;
2288 }
2289
2290 NTSTATUS
2291 AFSSubstituteNameInPath( IN OUT UNICODE_STRING *FullPathName,
2292                          IN OUT UNICODE_STRING *ComponentName,
2293                          IN UNICODE_STRING *SubstituteName,
2294                          IN OUT UNICODE_STRING *RemainingPath,
2295                          IN BOOLEAN FreePathName)
2296 {
2297
2298     NTSTATUS ntStatus = STATUS_SUCCESS;
2299     UNICODE_STRING uniPathName;
2300     USHORT usPrefixNameLen = 0;
2301     SHORT  sNameLenDelta = 0;
2302
2303     __Enter
2304     {
2305
2306         //
2307         // If the passed in name can handle the additional length
2308         // then just moves things around
2309         //
2310
2311         sNameLenDelta = SubstituteName->Length - ComponentName->Length;
2312
2313         usPrefixNameLen = (USHORT)(ComponentName->Buffer - FullPathName->Buffer);
2314
2315         if( FullPathName->MaximumLength > FullPathName->Length + sNameLenDelta)
2316         {
2317
2318             if( FullPathName->Length > usPrefixNameLen + ComponentName->Length)
2319             {
2320
2321                 RtlMoveMemory( &FullPathName->Buffer[ ((usPrefixNameLen*sizeof( WCHAR) + SubstituteName->Length)/sizeof( WCHAR))],
2322                                &FullPathName->Buffer[ ((usPrefixNameLen*sizeof( WCHAR) + ComponentName->Length)/sizeof( WCHAR))],
2323                                FullPathName->Length - usPrefixNameLen*sizeof( WCHAR) - ComponentName->Length);
2324             }
2325
2326             RtlCopyMemory( &FullPathName->Buffer[ usPrefixNameLen],
2327                            SubstituteName->Buffer,
2328                            SubstituteName->Length);
2329
2330             FullPathName->Length += sNameLenDelta;
2331
2332             ComponentName->Length += sNameLenDelta;
2333
2334             ComponentName->MaximumLength = ComponentName->Length;
2335
2336             if ( RemainingPath->Buffer)
2337             {
2338
2339                 RemainingPath->Buffer += sNameLenDelta/sizeof( WCHAR);
2340             }
2341
2342             try_return( ntStatus);
2343         }
2344
2345         //
2346         // Need to re-allocate the buffer
2347         //
2348
2349         uniPathName.Length = FullPathName->Length -
2350                                          ComponentName->Length +
2351                                          SubstituteName->Length;
2352
2353         uniPathName.MaximumLength = FullPathName->MaximumLength + PAGE_SIZE;
2354
2355         uniPathName.Buffer = (WCHAR *)AFSExAllocatePoolWithTag( PagedPool,
2356                                                                 uniPathName.MaximumLength,
2357                                                                 AFS_NAME_BUFFER_FOUR_TAG);
2358
2359         if( uniPathName.Buffer == NULL)
2360         {
2361
2362             try_return( ntStatus = STATUS_INSUFFICIENT_RESOURCES);
2363         }
2364
2365         usPrefixNameLen = (USHORT)(ComponentName->Buffer - FullPathName->Buffer);
2366
2367         usPrefixNameLen *= sizeof( WCHAR);
2368
2369         RtlZeroMemory( uniPathName.Buffer,
2370                        uniPathName.MaximumLength);
2371
2372         RtlCopyMemory( uniPathName.Buffer,
2373                        FullPathName->Buffer,
2374                        usPrefixNameLen);
2375
2376         RtlCopyMemory( &uniPathName.Buffer[ (usPrefixNameLen/sizeof( WCHAR))],
2377                        SubstituteName->Buffer,
2378                        SubstituteName->Length);
2379
2380         if( FullPathName->Length > usPrefixNameLen + ComponentName->Length)
2381         {
2382
2383             RtlCopyMemory( &uniPathName.Buffer[ (usPrefixNameLen + SubstituteName->Length)/sizeof( WCHAR)],
2384                            &FullPathName->Buffer[ (usPrefixNameLen + ComponentName->Length)/sizeof( WCHAR)],
2385                            FullPathName->Length - usPrefixNameLen - ComponentName->Length);
2386         }
2387
2388         ComponentName->Buffer = uniPathName.Buffer + (ComponentName->Buffer - FullPathName->Buffer);
2389
2390         ComponentName->Length += sNameLenDelta;
2391
2392         ComponentName->MaximumLength = ComponentName->Length;
2393
2394         if ( RemainingPath->Buffer)
2395         {
2396
2397             RemainingPath->Buffer = uniPathName.Buffer
2398                 + (RemainingPath->Buffer - FullPathName->Buffer)
2399                 + sNameLenDelta/sizeof( WCHAR);
2400         }
2401
2402         if( FreePathName)
2403         {
2404             AFSExFreePool( FullPathName->Buffer);
2405         }
2406
2407         *FullPathName = uniPathName;
2408
2409 try_exit:
2410
2411         NOTHING;
2412     }
2413
2414     return ntStatus;
2415 }
2416
2417 NTSTATUS
2418 AFSInvalidateVolume( IN AFSVolumeCB *VolumeCB,
2419                      IN ULONG Reason)
2420 {
2421
2422     NTSTATUS ntStatus = STATUS_SUCCESS;
2423     AFSObjectInfoCB *pCurrentObject = NULL;
2424     AFSObjectInfoCB *pNextObject = NULL;
2425     LONG lCount;
2426     AFSFcb *pFcb = NULL;
2427     ULONG ulFilter = 0;
2428
2429     __Enter
2430     {
2431
2432         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2433                       AFS_TRACE_LEVEL_VERBOSE,
2434                       "AFSInvalidateVolume Invalidate volume fid %08lX-%08lX-%08lX-%08lX Reason %08lX\n",
2435                       VolumeCB->ObjectInformation.FileId.Cell,
2436                       VolumeCB->ObjectInformation.FileId.Volume,
2437                       VolumeCB->ObjectInformation.FileId.Vnode,
2438                       VolumeCB->ObjectInformation.FileId.Unique,
2439                       Reason);
2440
2441         //
2442         // Depending on the reason for invalidation then perform work on the node
2443         //
2444
2445         switch( Reason)
2446         {
2447
2448             case AFS_INVALIDATE_DELETED:
2449             {
2450
2451                 //
2452                 // Mark this volume as invalid
2453                 //
2454
2455                 SetFlag( VolumeCB->ObjectInformation.Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID);
2456
2457                 SetFlag( VolumeCB->Flags, AFS_VOLUME_FLAGS_OFFLINE);
2458
2459                 break;
2460             }
2461         }
2462
2463         //
2464         // Invalidate the volume root directory
2465         //
2466
2467         pCurrentObject = &VolumeCB->ObjectInformation;
2468
2469         if ( pCurrentObject )
2470         {
2471
2472             lCount = InterlockedIncrement( &pCurrentObject->ObjectReferenceCount);
2473
2474             AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2475                           AFS_TRACE_LEVEL_VERBOSE,
2476                           "AFSInvalidateVolumeObjects Increment count on object %08lX Cnt %d\n",
2477                           pCurrentObject,
2478                           lCount);
2479
2480             AFSInvalidateObject( &pCurrentObject,
2481                                  Reason);
2482
2483             if ( pCurrentObject)
2484             {
2485
2486                 lCount = InterlockedDecrement( &pCurrentObject->ObjectReferenceCount);
2487
2488                 AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2489                               AFS_TRACE_LEVEL_VERBOSE,
2490                               "AFSInvalidateVolumeObjects Decrement count on object %08lX Cnt %d\n",
2491                               pCurrentObject,
2492                               lCount);
2493             }
2494         }
2495
2496         //
2497         // Apply invalidation to all other volume objects
2498         //
2499
2500         AFSAcquireShared( VolumeCB->ObjectInfoTree.TreeLock,
2501                           TRUE);
2502
2503         pCurrentObject = VolumeCB->ObjectInfoListHead;
2504
2505         if ( pCurrentObject)
2506         {
2507
2508             //
2509             // Reference the node so it won't be torn down
2510             //
2511
2512             lCount = InterlockedIncrement( &pCurrentObject->ObjectReferenceCount);
2513
2514             AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2515                           AFS_TRACE_LEVEL_VERBOSE,
2516                           "AFSInvalidateVolumeObjects Increment count on object %08lX Cnt %d\n",
2517                           pCurrentObject,
2518                           lCount);
2519         }
2520
2521         while( pCurrentObject != NULL)
2522         {
2523
2524             pNextObject = (AFSObjectInfoCB *)pCurrentObject->ListEntry.fLink;
2525
2526             if ( pNextObject)
2527             {
2528
2529                 //
2530                 // Reference the node so it won't be torn down
2531                 //
2532
2533                 lCount = InterlockedIncrement( &pNextObject->ObjectReferenceCount);
2534
2535                 AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2536                               AFS_TRACE_LEVEL_VERBOSE,
2537                               "AFSInvalidateVolumeObjects Increment count on object %08lX Cnt %d\n",
2538                               pNextObject,
2539                               lCount);
2540             }
2541
2542             AFSReleaseResource( VolumeCB->ObjectInfoTree.TreeLock);
2543
2544             AFSInvalidateObject( &pCurrentObject,
2545                                  Reason);
2546
2547             if ( pCurrentObject )
2548             {
2549
2550                 lCount = InterlockedDecrement( &pCurrentObject->ObjectReferenceCount);
2551
2552                 AFSDbgLogMsg( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
2553                               AFS_TRACE_LEVEL_VERBOSE,
2554                               "AFSInvalidateVolumeObjects Decrement count on object %08lX Cnt %d\n",
2555                               pCurrentObject,
2556                               lCount);
2557             }
2558
2559             AFSAcquireShared( VolumeCB->ObjectInfoTree.TreeLock,
2560                               TRUE);
2561
2562             pCurrentObject = pNextObject;
2563         }
2564
2565         AFSReleaseResource( VolumeCB->ObjectInfoTree.TreeLock);
2566     }
2567
2568     return ntStatus;
2569 }
2570
2571 VOID
2572 AFSInvalidateAllVolumes( VOID)
2573 {
2574     AFSVolumeCB *pVolumeCB = NULL;
2575     AFSVolumeCB *pNextVolumeCB = NULL;
2576     AFSDeviceExt *pRDRDeviceExt = NULL;
2577     LONG lCount;
2578
2579     pRDRDeviceExt = (AFSDeviceExt *)AFSRDRDeviceObject->DeviceExtension;
2580
2581     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
2582                   AFS_TRACE_LEVEL_VERBOSE,
2583                   "AFSInvalidateAllVolumes Acquiring RDR VolumeListLock lock %08lX SHARED %08lX\n",
2584                   &pRDRDeviceExt->Specific.RDR.VolumeListLock,
2585                   PsGetCurrentThread());
2586
2587     AFSAcquireShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
2588                       TRUE);
2589
2590     pVolumeCB = pRDRDeviceExt->Specific.RDR.VolumeListHead;
2591
2592     if ( pVolumeCB)
2593     {
2594
2595         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
2596                       AFS_TRACE_LEVEL_VERBOSE,
2597                       "AFSInvalidateAllVolumes Acquiring VolumeRoot ObjectInfoTree lock %08lX SHARED %08lX\n",
2598                       pVolumeCB->ObjectInfoTree.TreeLock,
2599                       PsGetCurrentThread());
2600
2601         lCount = InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
2602     }
2603
2604     while( pVolumeCB != NULL)
2605     {
2606
2607         pNextVolumeCB = (AFSVolumeCB *)pVolumeCB->ListEntry.fLink;
2608
2609         if ( pNextVolumeCB)
2610         {
2611
2612             lCount = InterlockedIncrement( &pNextVolumeCB->VolumeReferenceCount);
2613         }
2614
2615         AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
2616
2617         // do I need to hold the volume lock here?
2618
2619         AFSInvalidateVolume( pVolumeCB, AFS_INVALIDATE_EXPIRED);
2620
2621         AFSAcquireShared( &pRDRDeviceExt->Specific.RDR.VolumeListLock,
2622                           TRUE);
2623
2624         lCount = InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
2625
2626         pVolumeCB = pNextVolumeCB;
2627     }
2628
2629     AFSReleaseResource( &pRDRDeviceExt->Specific.RDR.VolumeListLock);
2630 }
2631
2632 NTSTATUS
2633 AFSVerifyEntry( IN GUID *AuthGroup,
2634                 IN AFSDirectoryCB *DirEntry)
2635 {
2636
2637     NTSTATUS ntStatus = STATUS_SUCCESS;
2638     AFSDirEnumEntry *pDirEnumEntry = NULL;
2639     AFSObjectInfoCB *pObjectInfo = DirEntry->ObjectInformation;
2640     IO_STATUS_BLOCK stIoStatus;
2641
2642     __Enter
2643     {
2644
2645         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2646                       AFS_TRACE_LEVEL_VERBOSE_2,
2647                       "AFSVerifyEntry Verifying entry %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2648                       &DirEntry->NameInformation.FileName,
2649                       pObjectInfo->FileId.Cell,
2650                       pObjectInfo->FileId.Volume,
2651                       pObjectInfo->FileId.Vnode,
2652                       pObjectInfo->FileId.Unique);
2653
2654         ntStatus = AFSEvaluateTargetByID( pObjectInfo,
2655                                           AuthGroup,
2656                                           FALSE,
2657                                           &pDirEnumEntry);
2658
2659         if( !NT_SUCCESS( ntStatus))
2660         {
2661
2662             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2663                           AFS_TRACE_LEVEL_ERROR,
2664                           "AFSValidateEntry Evaluate Target failed %wZ FID %08lX-%08lX-%08lX-%08lX Status 0x%08lX\n",
2665                           &DirEntry->NameInformation.FileName,
2666                           pObjectInfo->FileId.Cell,
2667                           pObjectInfo->FileId.Volume,
2668                           pObjectInfo->FileId.Vnode,
2669                           pObjectInfo->FileId.Unique,
2670                           ntStatus);
2671
2672             try_return( ntStatus);
2673         }
2674
2675         //
2676         // Check the data version of the file
2677         //
2678
2679         if( pObjectInfo->DataVersion.QuadPart == pDirEnumEntry->DataVersion.QuadPart &&
2680             !BooleanFlagOn( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY_DATA))
2681         {
2682
2683             AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2684                           AFS_TRACE_LEVEL_VERBOSE,
2685                           "AFSVerifyEntry No DV change %I64X for Fcb %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2686                           pObjectInfo->DataVersion.QuadPart,
2687                           &DirEntry->NameInformation.FileName,
2688                           pObjectInfo->FileId.Cell,
2689                           pObjectInfo->FileId.Volume,
2690                           pObjectInfo->FileId.Vnode,
2691                           pObjectInfo->FileId.Unique);
2692
2693             //
2694             // We are ok, just get out
2695             //
2696
2697             ClearFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY);
2698
2699             try_return( ntStatus = STATUS_SUCCESS);
2700         }
2701
2702         //
2703         // New data version so we will need to process the node based on the type
2704         //
2705
2706         switch( pDirEnumEntry->FileType)
2707         {
2708
2709             case AFS_FILE_TYPE_MOUNTPOINT:
2710             {
2711
2712                 //
2713                 // For a mount point we need to ensure the target is the same
2714                 //
2715
2716                 if( !AFSIsEqualFID( &pObjectInfo->TargetFileId,
2717                                     &pDirEnumEntry->TargetFileId))
2718                 {
2719
2720                 }
2721
2722                 //
2723                 // Update the metadata for the entry
2724                 //
2725
2726                 ntStatus = AFSUpdateMetaData( DirEntry,
2727                                               pDirEnumEntry);
2728
2729                 if( NT_SUCCESS( ntStatus))
2730                 {
2731
2732                     ClearFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY);
2733                 }
2734
2735                 break;
2736             }
2737
2738             case AFS_FILE_TYPE_SYMLINK:
2739             {
2740
2741                 ASSERT( pDirEnumEntry->TargetNameLength > 0);
2742
2743                 //
2744                 // Update the metadata for the entry
2745                 //
2746
2747                 ntStatus = AFSUpdateMetaData( DirEntry,
2748                                               pDirEnumEntry);
2749
2750                 if( NT_SUCCESS( ntStatus))
2751                 {
2752
2753                     ClearFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY);
2754                 }
2755
2756                 break;
2757             }
2758
2759             case AFS_FILE_TYPE_FILE:
2760             {
2761                 FILE_OBJECT * pCCFileObject = NULL;
2762                 BOOLEAN bPurgeExtents = FALSE;
2763
2764                 if ( BooleanFlagOn( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY_DATA))
2765                 {
2766                     bPurgeExtents = TRUE;
2767
2768                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2769                                   AFS_TRACE_LEVEL_VERBOSE,
2770                                   "AFSVerifyEntry Clearing VERIFY_DATA flag %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2771                                   &DirEntry->NameInformation.FileName,
2772                                   pObjectInfo->FileId.Cell,
2773                                   pObjectInfo->FileId.Volume,
2774                                   pObjectInfo->FileId.Vnode,
2775                                   pObjectInfo->FileId.Unique);
2776
2777                     ClearFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY_DATA);
2778                 }
2779
2780                 //
2781                 // Update the metadata for the entry
2782                 //
2783
2784                 ntStatus = AFSUpdateMetaData( DirEntry,
2785                                               pDirEnumEntry);
2786
2787                 if( !NT_SUCCESS( ntStatus))
2788                 {
2789
2790                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2791                                   AFS_TRACE_LEVEL_ERROR,
2792                                   "AFSVerifyEntry Meta Data Update failed %wZ FID %08lX-%08lX-%08lX-%08lX ntStatus %08lX\n",
2793                                   &DirEntry->NameInformation.FileName,
2794                                   pObjectInfo->FileId.Cell,
2795                                   pObjectInfo->FileId.Volume,
2796                                   pObjectInfo->FileId.Vnode,
2797                                   pObjectInfo->FileId.Unique,
2798                                   ntStatus);
2799
2800                     break;
2801                 }
2802
2803                 if( pObjectInfo->Fcb != NULL)
2804                 {
2805
2806                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2807                                   AFS_TRACE_LEVEL_VERBOSE,
2808                                   "AFSVerifyEntry Flush/purge entry %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2809                                   &DirEntry->NameInformation.FileName,
2810                                   pObjectInfo->FileId.Cell,
2811                                   pObjectInfo->FileId.Volume,
2812                                   pObjectInfo->FileId.Vnode,
2813                                   pObjectInfo->FileId.Unique);
2814
2815                     AFSAcquireExcl( &pObjectInfo->Fcb->NPFcb->Resource,
2816                                     TRUE);
2817
2818                     __try
2819                     {
2820
2821                         CcFlushCache( &pObjectInfo->Fcb->NPFcb->SectionObjectPointers,
2822                                       NULL,
2823                                       0,
2824                                       &stIoStatus);
2825
2826                         if( !NT_SUCCESS( stIoStatus.Status))
2827                         {
2828
2829                             AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2830                                           AFS_TRACE_LEVEL_ERROR,
2831                                           "AFSVerifyEntry CcFlushCache failure %wZ FID %08lX-%08lX-%08lX-%08lX Status 0x%08lX Bytes 0x%08lX\n",
2832                                           &DirEntry->NameInformation.FileName,
2833                                           pObjectInfo->FileId.Cell,
2834                                           pObjectInfo->FileId.Volume,
2835                                           pObjectInfo->FileId.Vnode,
2836                                           pObjectInfo->FileId.Unique,
2837                                           stIoStatus.Status,
2838                                           stIoStatus.Information);
2839
2840                             ntStatus = stIoStatus.Status;
2841                         }
2842
2843                         if ( bPurgeExtents)
2844                         {
2845
2846                             CcPurgeCacheSection( &pObjectInfo->Fcb->NPFcb->SectionObjectPointers,
2847                                                  NULL,
2848                                                  0,
2849                                                  FALSE);
2850                         }
2851                     }
2852                     __except( EXCEPTION_EXECUTE_HANDLER)
2853                     {
2854                         ntStatus = GetExceptionCode();
2855
2856                         AFSDbgLogMsg( AFS_SUBSYSTEM_IO_PROCESSING,
2857                                       AFS_TRACE_LEVEL_ERROR,
2858                                       "AFSVerifyEntry CcFlushCache or CcPurgeCacheSection Exception %wZ FID %08lX-%08lX-%08lX-%08lX Status 0x%08lX\n",
2859                                       &DirEntry->NameInformation.FileName,
2860                                       pObjectInfo->FileId.Cell,
2861                                       pObjectInfo->FileId.Volume,
2862                                       pObjectInfo->FileId.Vnode,
2863                                       pObjectInfo->FileId.Unique,
2864                                       ntStatus);
2865                     }
2866
2867                     AFSReleaseResource( &pObjectInfo->Fcb->NPFcb->Resource);
2868
2869                     if ( bPurgeExtents)
2870                     {
2871                         AFSFlushExtents( pObjectInfo->Fcb,
2872                                          AuthGroup);
2873                     }
2874
2875                     //
2876                     // Reacquire the Fcb to purge the cache
2877                     //
2878
2879                     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
2880                                   AFS_TRACE_LEVEL_VERBOSE,
2881                                   "AFSVerifyEntry Acquiring Fcb lock %08lX EXCL %08lX\n",
2882                                   &pObjectInfo->Fcb->NPFcb->Resource,
2883                                   PsGetCurrentThread());
2884
2885                     AFSAcquireExcl( &pObjectInfo->Fcb->NPFcb->Resource,
2886                                     TRUE);
2887
2888                     //
2889                     // Update file sizes
2890                     //
2891
2892                     pObjectInfo->Fcb->Header.AllocationSize.QuadPart  = pObjectInfo->AllocationSize.QuadPart;
2893                     pObjectInfo->Fcb->Header.FileSize.QuadPart        = pObjectInfo->EndOfFile.QuadPart;
2894                     pObjectInfo->Fcb->Header.ValidDataLength.QuadPart = pObjectInfo->EndOfFile.QuadPart;
2895
2896                     pCCFileObject = CcGetFileObjectFromSectionPtrs( &pObjectInfo->Fcb->NPFcb->SectionObjectPointers);
2897
2898                     if ( pCCFileObject != NULL)
2899                     {
2900                         CcSetFileSizes( pCCFileObject,
2901                                         (PCC_FILE_SIZES)&pObjectInfo->Fcb->Header.AllocationSize);
2902                     }
2903
2904                     AFSReleaseResource( &pObjectInfo->Fcb->NPFcb->Resource);
2905                 }
2906                 else
2907                 {
2908                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2909                                   AFS_TRACE_LEVEL_WARNING,
2910                                   "AFSValidateEntry Fcb NULL %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2911                                   &DirEntry->NameInformation.FileName,
2912                                   pObjectInfo->FileId.Cell,
2913                                   pObjectInfo->FileId.Volume,
2914                                   pObjectInfo->FileId.Vnode,
2915                                   pObjectInfo->FileId.Unique);
2916                 }
2917
2918                 ClearFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY);
2919
2920                 break;
2921             }
2922
2923             case AFS_FILE_TYPE_DIRECTORY:
2924             {
2925
2926                 AFSFcb *pCurrentFcb = NULL;
2927                 AFSDirectoryCB *pCurrentDirEntry = NULL;
2928
2929                 //
2930                 // For a directory or root entry flush the content of
2931                 // the directory enumeration.
2932                 //
2933
2934                 if( BooleanFlagOn( pObjectInfo->Flags, AFS_OBJECT_FLAGS_DIRECTORY_ENUMERATED))
2935                 {
2936
2937                     AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
2938                                   AFS_TRACE_LEVEL_VERBOSE_2,
2939                                   "AFSVerifyEntry Validating directory content for entry %wZ FID %08lX-%08lX-%08lX-%08lX\n",
2940                                   &DirEntry->NameInformation.FileName,
2941                                   pObjectInfo->FileId.Cell,
2942                                   pObjectInfo->FileId.Volume,
2943                                   pObjectInfo->FileId.Vnode,
2944                                   pObjectInfo->FileId.Unique);
2945
2946                     AFSAcquireExcl( pObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock,
2947                                     TRUE);
2948
2949                     ntStatus = AFSValidateDirectoryCache( pObjectInfo,
2950                                                           AuthGroup);
2951
2952                     AFSReleaseResource( pObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock);
2953
2954                     if ( !NT_SUCCESS( ntStatus))
2955                     {
2956
2957                         try_return( ntStatus);
2958                     }
2959                 }
2960
2961                 //
2962                 // Update the metadata for the entry
2963                 //
2964
2965                 ntStatus = AFSUpdateMetaData( DirEntry,
2966                                               pDirEnumEntry);
2967
2968                 if( NT_SUCCESS( ntStatus))
2969                 {
2970
2971                     ClearFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY);
2972                 }
2973
2974                 break;
2975             }
2976
2977             case AFS_FILE_TYPE_DFSLINK:
2978             {
2979
2980                 UNICODE_STRING uniTargetName;
2981
2982                 //
2983                 // For a DFS link need to check the target name has not changed
2984                 //
2985
2986                 uniTargetName.Length = (USHORT)pDirEnumEntry->TargetNameLength;
2987
2988                 uniTargetName.MaximumLength = uniTargetName.Length;
2989
2990                 uniTargetName.Buffer = (WCHAR *)((char *)pDirEnumEntry + pDirEnumEntry->TargetNameOffset);
2991
2992                 AFSAcquireExcl( &DirEntry->NonPaged->Lock,
2993                                 TRUE);
2994
2995                 if( DirEntry->NameInformation.TargetName.Length == 0 ||
2996                     RtlCompareUnicodeString( &uniTargetName,
2997                                              &DirEntry->NameInformation.TargetName,
2998                                              TRUE) != 0)
2999                 {
3000
3001                     //
3002                     // Update the target name
3003                     //
3004
3005                     ntStatus = AFSUpdateTargetName( &DirEntry->NameInformation.TargetName,
3006                                                     &DirEntry->Flags,
3007                                                     uniTargetName.Buffer,
3008                                                     uniTargetName.Length);
3009
3010                     if( !NT_SUCCESS( ntStatus))
3011                     {
3012
3013                         AFSReleaseResource( &DirEntry->NonPaged->Lock);
3014
3015                         break;
3016                     }
3017                 }
3018
3019                 AFSReleaseResource( &DirEntry->NonPaged->Lock);
3020
3021                 //
3022                 // Update the metadata for the entry
3023                 //
3024
3025                 ntStatus = AFSUpdateMetaData( DirEntry,
3026                                               pDirEnumEntry);
3027
3028                 if( NT_SUCCESS( ntStatus))
3029                 {
3030
3031                     ClearFlag( pObjectInfo->Flags, AFS_OBJECT_FLAGS_VERIFY);
3032                 }
3033
3034                 break;
3035             }
3036
3037             default:
3038
3039                 AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3040                               AFS_TRACE_LEVEL_WARNING,
3041                               "AFSVerifyEntry Attempt to verify node of type %d %wZ FID %08lX-%08lX-%08lX-%08lX\n",
3042                               pObjectInfo->FileType,
3043                               &DirEntry->NameInformation.FileName,
3044                               pObjectInfo->FileId.Cell,
3045                               pObjectInfo->FileId.Volume,
3046                               pObjectInfo->FileId.Vnode,
3047                               pObjectInfo->FileId.Unique);
3048
3049                 break;
3050         }
3051
3052  try_exit:
3053
3054         if( pDirEnumEntry != NULL)
3055         {
3056
3057             AFSExFreePool( pDirEnumEntry);
3058         }
3059     }
3060
3061     return ntStatus;
3062 }
3063
3064 NTSTATUS
3065 AFSSetVolumeState( IN AFSVolumeStatusCB *VolumeStatus)
3066 {
3067
3068     NTSTATUS ntStatus = STATUS_SUCCESS;
3069     AFSDeviceExt *pDevExt = (AFSDeviceExt *) AFSRDRDeviceObject->DeviceExtension;
3070     ULONGLONG   ullIndex = 0;
3071     AFSVolumeCB *pVolumeCB = NULL;
3072     AFSFcb *pFcb = NULL;
3073     AFSObjectInfoCB *pCurrentObject = NULL;
3074     LONG lCount;
3075
3076     __Enter
3077     {
3078
3079         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3080                       AFS_TRACE_LEVEL_VERBOSE,
3081                       "AFSSetVolumeState Marking volume state %d Volume Cell %08lX Volume %08lX\n",
3082                       VolumeStatus->Online,
3083                       VolumeStatus->FileID.Cell,
3084                       VolumeStatus->FileID.Volume);
3085
3086         //
3087         // Need to locate the Fcb for the directory to purge
3088         //
3089
3090         AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
3091                       AFS_TRACE_LEVEL_VERBOSE,
3092                       "AFSSetVolumeState Acquiring RDR VolumeTreeLock lock %08lX SHARED %08lX\n",
3093                       &pDevExt->Specific.RDR.VolumeTreeLock,
3094                       PsGetCurrentThread());
3095
3096         AFSAcquireShared( &pDevExt->Specific.RDR.VolumeTreeLock, TRUE);
3097
3098         //
3099         // Locate the volume node
3100         //
3101
3102         ullIndex = AFSCreateHighIndex( &VolumeStatus->FileID);
3103
3104         ntStatus = AFSLocateHashEntry( pDevExt->Specific.RDR.VolumeTree.TreeHead,
3105                                        ullIndex,
3106                                        (AFSBTreeEntry **)&pVolumeCB);
3107
3108         if( pVolumeCB != NULL)
3109         {
3110
3111             lCount = InterlockedIncrement( &pVolumeCB->VolumeReferenceCount);
3112
3113             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
3114
3115             //
3116             // Set the volume state accordingly
3117             //
3118
3119             if( VolumeStatus->Online)
3120             {
3121
3122                 InterlockedAnd( (LONG *)&(pVolumeCB->Flags), ~AFS_VOLUME_FLAGS_OFFLINE);
3123             }
3124             else
3125             {
3126
3127                 InterlockedOr( (LONG *)&(pVolumeCB->Flags), AFS_VOLUME_FLAGS_OFFLINE);
3128             }
3129
3130             AFSAcquireShared( pVolumeCB->ObjectInfoTree.TreeLock,
3131                               TRUE);
3132
3133             pCurrentObject = pVolumeCB->ObjectInfoListHead;;
3134
3135             while( pCurrentObject != NULL)
3136             {
3137
3138                 if( VolumeStatus->Online)
3139                 {
3140
3141                     ClearFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID);
3142
3143                     SetFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_VERIFY);
3144
3145                     pCurrentObject->DataVersion.QuadPart = (ULONGLONG)-1;
3146                 }
3147                 else
3148                 {
3149
3150                     SetFlag( pCurrentObject->Flags, AFS_OBJECT_FLAGS_OBJECT_INVALID);
3151                 }
3152
3153                 pFcb = pCurrentObject->Fcb;
3154
3155                 if( pFcb != NULL &&
3156                     !(VolumeStatus->Online) &&
3157                     pFcb->Header.NodeTypeCode == AFS_FILE_FCB)
3158                 {
3159
3160                     AFSDbgLogMsg( AFS_SUBSYSTEM_EXTENT_PROCESSING,
3161                                   AFS_TRACE_LEVEL_ERROR,
3162                                   "AFSSetVolumeState Marking volume offline and canceling extents Volume Cell %08lX Volume %08lX\n",
3163                                   VolumeStatus->FileID.Cell,
3164                                   VolumeStatus->FileID.Volume);
3165
3166                     //
3167                     // Clear out the extents
3168                     //
3169
3170                     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
3171                                   AFS_TRACE_LEVEL_VERBOSE,
3172                                   "AFSSetVolumeState Acquiring Fcb extents lock %08lX EXCL %08lX\n",
3173                                   &pFcb->NPFcb->Specific.File.ExtentsResource,
3174                                   PsGetCurrentThread());
3175
3176                     AFSAcquireExcl( &pFcb->NPFcb->Specific.File.ExtentsResource,
3177                                     TRUE);
3178
3179                     pFcb->NPFcb->Specific.File.ExtentsRequestStatus = STATUS_CANCELLED;
3180
3181                     KeSetEvent( &pFcb->NPFcb->Specific.File.ExtentsRequestComplete,
3182                                 0,
3183                                 FALSE);
3184
3185                     AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
3186                                   AFS_TRACE_LEVEL_VERBOSE,
3187                                   "AFSSetVolumeState Releasing Fcb extents lock %08lX EXCL %08lX\n",
3188                                   &pFcb->NPFcb->Specific.File.ExtentsResource,
3189                                   PsGetCurrentThread());
3190
3191                     AFSReleaseResource( &pFcb->NPFcb->Specific.File.ExtentsResource);
3192
3193                     //
3194                     // And get rid of them (note this involves waiting
3195                     // for any writes or reads to the cache to complete)
3196                     //
3197
3198                     (VOID) AFSTearDownFcbExtents( pFcb,
3199                                                   NULL);
3200                 }
3201
3202                 pCurrentObject = (AFSObjectInfoCB *)pCurrentObject->ListEntry.fLink;
3203             }
3204
3205             AFSReleaseResource( pVolumeCB->ObjectInfoTree.TreeLock);
3206
3207             lCount = InterlockedDecrement( &pVolumeCB->VolumeReferenceCount);
3208         }
3209         else
3210         {
3211
3212             AFSReleaseResource( &pDevExt->Specific.RDR.VolumeTreeLock);
3213         }
3214     }
3215
3216     return ntStatus;
3217 }
3218
3219 NTSTATUS
3220 AFSSetNetworkState( IN AFSNetworkStatusCB *NetworkStatus)
3221 {
3222
3223     NTSTATUS ntStatus = STATUS_SUCCESS;
3224
3225     __Enter
3226     {
3227
3228         if( AFSGlobalRoot == NULL)
3229         {
3230
3231             try_return( ntStatus);
3232         }
3233
3234         AFSAcquireExcl( AFSGlobalRoot->VolumeLock,
3235                         TRUE);
3236
3237         //
3238         // Set the network state according to the information
3239         //
3240
3241         if( NetworkStatus->Online)
3242         {
3243
3244             ClearFlag( AFSGlobalRoot->Flags, AFS_VOLUME_FLAGS_OFFLINE);
3245         }
3246         else
3247         {
3248
3249             SetFlag( AFSGlobalRoot->Flags, AFS_VOLUME_FLAGS_OFFLINE);
3250         }
3251
3252         AFSReleaseResource( AFSGlobalRoot->VolumeLock);
3253
3254 try_exit:
3255
3256         NOTHING;
3257     }
3258
3259     return ntStatus;
3260 }
3261
3262 NTSTATUS
3263 AFSValidateDirectoryCache( IN AFSObjectInfoCB *ObjectInfo,
3264                            IN GUID *AuthGroup)
3265 {
3266
3267     NTSTATUS ntStatus = STATUS_SUCCESS;
3268     BOOLEAN  bAcquiredLock = FALSE;
3269     AFSDirectoryCB *pCurrentDirEntry = NULL, *pNextDirEntry = NULL;
3270     AFSFcb *pFcb = NULL;
3271
3272     __Enter
3273     {
3274
3275         AFSDbgLogMsg( AFS_SUBSYSTEM_FILE_PROCESSING,
3276                       AFS_TRACE_LEVEL_VERBOSE,
3277                       "AFSValidateDirectoryCache Validating content for FID %08lX-%08lX-%08lX-%08lX\n",
3278                       ObjectInfo->FileId.Cell,
3279                       ObjectInfo->FileId.Volume,
3280                       ObjectInfo->FileId.Vnode,
3281                       ObjectInfo->FileId.Unique);
3282
3283         if( !ExIsResourceAcquiredLite( ObjectInfo->Specific.Directory.DirectoryNodeHdr.TreeLock))
3284         {
3285
3286             AFSDbgLogMsg( AFS_SUBSYSTEM_LOCK_PROCESSING,
3287           &nb