ReactOS  0.4.14-dev-49-gfb4591c
cmkcbncb.c
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1 /*
2  * PROJECT: ReactOS Kernel
3  * LICENSE: GPL - See COPYING in the top level directory
4  * FILE: ntoskrnl/config/cmkcbncb.c
5  * PURPOSE: Routines for handling KCBs, NCBs, as well as key hashes.
6  * PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
7  */
8 
9 /* INCLUDES ******************************************************************/
10 
11 #include <ntoskrnl.h>
12 #define NDEBUG
13 #include <debug.h>
14 
15 /* GLOBALS *******************************************************************/
16 
20 
21 /* FUNCTIONS *****************************************************************/
22 
23 INIT_FUNCTION
24 VOID
25 NTAPI
27 {
28  ULONG Length, i;
29 
30  /* Calculate length for the table */
32 
33  /* Allocate it */
35  if (!CmpCacheTable)
36  {
37  /* Take the system down */
38  KeBugCheckEx(CONFIG_INITIALIZATION_FAILED, 3, 1, 0, 0);
39  }
40 
41  /* Zero out the table */
43 
44  /* Initialize the locks */
45  for (i = 0;i < CmpHashTableSize; i++)
46  {
47  /* Setup the pushlock */
49  }
50 
51  /* Calculate length for the name cache */
53 
54  /* Now allocate the name cache table */
56  if (!CmpNameCacheTable)
57  {
58  /* Take the system down */
59  KeBugCheckEx(CONFIG_INITIALIZATION_FAILED, 3, 3, 0, 0);
60  }
61 
62  /* Zero out the table */
64 
65  /* Initialize the locks */
66  for (i = 0;i < CmpHashTableSize; i++)
67  {
68  /* Setup the pushlock */
70  }
71 
72  /* Setup the delayed close table */
74 }
75 
76 VOID
77 NTAPI
79 {
80  PCM_KEY_HASH *Prev;
81  PCM_KEY_HASH Current;
83 
84  /* Lookup all the keys in this index entry */
85  Prev = &GET_HASH_ENTRY(CmpCacheTable, KeyHash->ConvKey)->Entry;
86  while (TRUE)
87  {
88  /* Save the current one and make sure it's valid */
89  Current = *Prev;
90  ASSERT(Current != NULL);
91  ASSERT_VALID_HASH(Current);
92 
93  /* Check if it matches */
94  if (Current == KeyHash)
95  {
96  /* Then write the previous one */
97  *Prev = Current->NextHash;
98  if (*Prev) ASSERT_VALID_HASH(*Prev);
99  break;
100  }
101 
102  /* Otherwise, keep going */
103  Prev = &Current->NextHash;
104  }
105 }
106 
108 NTAPI
110  IN BOOLEAN IsFake)
111 {
112  ULONG i;
115 
116  /* Get the hash index */
117  i = GET_HASH_INDEX(KeyHash->ConvKey);
118 
119  /* If this is a fake key, increase the key cell to use the parent data */
120  if (IsFake) KeyHash->KeyCell++;
121 
122  /* Loop the hash table */
124  while (Entry)
125  {
126  /* Check if this matches */
128  if ((KeyHash->ConvKey == Entry->ConvKey) &&
129  (KeyHash->KeyCell == Entry->KeyCell) &&
130  (KeyHash->KeyHive == Entry->KeyHive))
131  {
132  /* Return it */
134  }
135 
136  /* Keep looping */
137  Entry = Entry->NextHash;
138  }
139 
140  /* No entry found, add this one and return NULL since none existed */
141  KeyHash->NextHash = CmpCacheTable[i].Entry;
143  return NULL;
144 }
145 
147 NTAPI
149 {
151  ULONG ConvKey = 0;
152  PWCHAR p, pp;
153  ULONG i;
154  BOOLEAN IsCompressed = TRUE, Found = FALSE;
156  ULONG NcbSize;
157  USHORT Length;
158 
159  /* Loop the name */
160  p = NodeName->Buffer;
161  for (i = 0; i < NodeName->Length; i += sizeof(WCHAR))
162  {
163  /* Make sure it's not a slash */
164  if (*p != OBJ_NAME_PATH_SEPARATOR)
165  {
166  /* Add it to the hash */
167  ConvKey = 37 * ConvKey + RtlUpcaseUnicodeChar(*p);
168  }
169 
170  /* Next character */
171  p++;
172  }
173 
174  /* Set assumed lengh and loop to check */
175  Length = NodeName->Length / sizeof(WCHAR);
176  for (i = 0; i < (NodeName->Length / sizeof(WCHAR)); i++)
177  {
178  /* Check if this is a 16-bit character */
179  if (NodeName->Buffer[i] > (UCHAR)-1)
180  {
181  /* This is the actual size, and we know we're not compressed */
182  Length = NodeName->Length;
183  IsCompressed = FALSE;
184  break;
185  }
186  }
187 
188  /* Lock the NCB entry */
190 
191  /* Get the hash entry */
192  HashEntry = GET_HASH_ENTRY(CmpNameCacheTable, ConvKey)->Entry;
193  while (HashEntry)
194  {
195  /* Get the current NCB */
197 
198  /* Check if the hash matches */
199  if ((ConvKey == HashEntry->ConvKey) && (Length == Ncb->NameLength))
200  {
201  /* Assume success */
202  Found = TRUE;
203 
204  /* If the NCB is compressed, do a compressed name compare */
205  if (Ncb->Compressed)
206  {
207  /* Compare names */
209  {
210  /* We failed */
211  Found = FALSE;
212  }
213  }
214  else
215  {
216  /* Do a manual compare */
217  p = NodeName->Buffer;
218  pp = Ncb->Name;
219  for (i = 0; i < Ncb->NameLength; i += sizeof(WCHAR))
220  {
221  /* Compare the character */
223  {
224  /* Failed */
225  Found = FALSE;
226  break;
227  }
228 
229  /* Next chars */
230  p++;
231  pp++;
232  }
233  }
234 
235  /* Check if we found a name */
236  if (Found)
237  {
238  /* Reference it */
239  ASSERT(Ncb->RefCount != 0xFFFF);
240  Ncb->RefCount++;
241  break;
242  }
243  }
244 
245  /* Go to the next hash */
246  HashEntry = HashEntry->NextHash;
247  }
248 
249  /* Check if we didn't find it */
250  if (!Found)
251  {
252  /* Allocate one */
254  Ncb = CmpAllocate(NcbSize, TRUE, TAG_CM);
255  if (!Ncb)
256  {
257  /* Release the lock and fail */
258  CmpReleaseNcbLockByKey(ConvKey);
259  return NULL;
260  }
261 
262  /* Clear it out */
263  RtlZeroMemory(Ncb, NcbSize);
264 
265  /* Check if the name was compressed */
266  if (IsCompressed)
267  {
268  /* Copy the compressed name */
269  for (i = 0; i < NodeName->Length / sizeof(WCHAR); i++)
270  {
271  /* Copy Unicode to ANSI */
272  ((PCHAR)Ncb->Name)[i] = (CHAR)RtlUpcaseUnicodeChar(NodeName->Buffer[i]);
273  }
274  }
275  else
276  {
277  /* Copy the name directly */
278  for (i = 0; i < NodeName->Length / sizeof(WCHAR); i++)
279  {
280  /* Copy each unicode character */
281  Ncb->Name[i] = RtlUpcaseUnicodeChar(NodeName->Buffer[i]);
282  }
283  }
284 
285  /* Setup the rest of the NCB */
286  Ncb->Compressed = IsCompressed;
287  Ncb->ConvKey = ConvKey;
288  Ncb->RefCount++;
289  Ncb->NameLength = Length;
290 
291  /* Insert the name in the hash table */
292  HashEntry = &Ncb->NameHash;
293  HashEntry->NextHash = GET_HASH_ENTRY(CmpNameCacheTable, ConvKey)->Entry;
294  GET_HASH_ENTRY(CmpNameCacheTable, ConvKey)->Entry = HashEntry;
295  }
296 
297  /* Release NCB lock */
298  CmpReleaseNcbLockByKey(ConvKey);
299 
300  /* Return the NCB found */
301  return Ncb;
302 }
303 
304 VOID
305 NTAPI
307 {
308  /* Make sure we have the exclusive lock */
309  CMP_ASSERT_KCB_LOCK(Kcb);
310 
311  /* Remove the key hash */
312  CmpRemoveKeyHash(&Kcb->KeyHash);
313 }
314 
315 VOID
316 NTAPI
318 {
319  PCM_NAME_HASH Current, *Next;
320  ULONG ConvKey = Ncb->ConvKey;
321 
322  /* Lock the NCB */
324 
325  /* Decrease the reference count */
326  ASSERT(Ncb->RefCount >= 1);
327  if (!(--Ncb->RefCount))
328  {
329  /* Find the NCB in the table */
330  Next = &GET_HASH_ENTRY(CmpNameCacheTable, Ncb->ConvKey)->Entry;
331  while (TRUE)
332  {
333  /* Check the current entry */
334  Current = *Next;
335  ASSERT(Current != NULL);
336  if (Current == &Ncb->NameHash)
337  {
338  /* Unlink it */
339  *Next = Current->NextHash;
340  break;
341  }
342 
343  /* Get to the next one */
344  Next = &Current->NextHash;
345  }
346 
347  /* Found it, now free it */
348  CmpFree(Ncb, 0);
349  }
350 
351  /* Release the lock */
352  CmpReleaseNcbLockByKey(ConvKey);
353 }
354 
355 BOOLEAN
356 NTAPI
358 {
360  "%s - Referencing KCB: %p\n", __FUNCTION__, Kcb);
361 
362  /* Check if this is the KCB's first reference */
363  if (Kcb->RefCount == 0)
364  {
365  /* Check if the KCB is locked in shared mode */
366  if (!CmpIsKcbLockedExclusive(Kcb))
367  {
368  /* Convert it to exclusive */
370  {
371  /* Set the delayed close index so that we can be ignored */
372  Kcb->DelayedCloseIndex = 1;
373 
374  /* Increase the reference count while we release the lock */
375  InterlockedIncrement((PLONG)&Kcb->RefCount);
376 
377  /* Go from shared to exclusive */
379 
380  /* Decrement the reference count; the lock is now held again */
381  InterlockedDecrement((PLONG)&Kcb->RefCount);
382 
383  /* Check if we still control the index */
384  if (Kcb->DelayedCloseIndex == 1)
385  {
386  /* Reset it */
387  Kcb->DelayedCloseIndex = 0;
388  }
389  else
390  {
391  /* Sanity check */
392  ASSERT((Kcb->DelayedCloseIndex == CmpDelayedCloseSize) ||
393  (Kcb->DelayedCloseIndex == 0));
394  }
395  }
396  }
397  }
398 
399  /* Increase the reference count */
400  if ((InterlockedIncrement((PLONG)&Kcb->RefCount) & 0xFFFF) == 0)
401  {
402  /* We've overflown to 64K references, bail out */
403  InterlockedDecrement((PLONG)&Kcb->RefCount);
404  return FALSE;
405  }
406 
407  /* Check if this was the last close index */
408  if (!Kcb->DelayedCloseIndex)
409  {
410  /* Check if the KCB is locked in shared mode */
411  if (!CmpIsKcbLockedExclusive(Kcb))
412  {
413  /* Convert it to exclusive */
415  {
416  /* Go from shared to exclusive */
418  }
419  }
420 
421  /* If we're still the last entry, remove us */
422  if (!Kcb->DelayedCloseIndex) CmpRemoveFromDelayedClose(Kcb);
423  }
424 
425  /* Return success */
426  return TRUE;
427 }
428 
429 VOID
430 NTAPI
432 {
433  PULONG_PTR CachedList;
434  ULONG i;
435 
436  /* Make sure we have the exclusive lock */
437  CMP_ASSERT_KCB_LOCK(Kcb);
438 
439  /* Check if the value list is cached */
440  if (CMP_IS_CELL_CACHED(Kcb->ValueCache.ValueList))
441  {
442  /* Get the cache list */
443  CachedList = (PULONG_PTR)CMP_GET_CACHED_DATA(Kcb->ValueCache.ValueList);
444  for (i = 0; i < Kcb->ValueCache.Count; i++)
445  {
446  /* Check if this cell is cached */
447  if (CMP_IS_CELL_CACHED(CachedList[i]))
448  {
449  /* Free it */
450  CmpFree((PVOID)CMP_GET_CACHED_CELL(CachedList[i]), 0);
451  }
452  }
453 
454  /* Now free the list */
455  CmpFree((PVOID)CMP_GET_CACHED_CELL(Kcb->ValueCache.ValueList), 0);
456  Kcb->ValueCache.ValueList = HCELL_NIL;
457  }
458  else if (Kcb->ExtFlags & CM_KCB_SYM_LINK_FOUND)
459  {
460  /* This is a sym link, check if there's only one reference left */
461  if ((Kcb->ValueCache.RealKcb->RefCount == 1) &&
462  !(Kcb->ValueCache.RealKcb->Delete))
463  {
464  /* Disable delay close for the KCB */
465  Kcb->ValueCache.RealKcb->ExtFlags |= CM_KCB_NO_DELAY_CLOSE;
466  }
467 
468  /* Dereference the KCB */
469  CmpDelayDerefKeyControlBlock(Kcb->ValueCache.RealKcb);
470  Kcb->ExtFlags &= ~CM_KCB_SYM_LINK_FOUND;
471  }
472 }
473 
474 VOID
475 NTAPI
477  IN BOOLEAN LockHeldExclusively)
478 {
480  PAGED_CODE();
481 
482  /* Sanity checks */
483  CMP_ASSERT_KCB_LOCK(Kcb);
484  ASSERT(Kcb->RefCount == 0);
485 
486  /* Cleanup the value cache */
488 
489  /* Dereference the NCB */
491 
492  /* Check if we have an index hint block and free it */
493  if (Kcb->ExtFlags & CM_KCB_SUBKEY_HINT) CmpFree(Kcb->IndexHint, 0);
494 
495  /* Check if we were already deleted */
496  Parent = Kcb->ParentKcb;
497  if (!Kcb->Delete) CmpRemoveKeyControlBlock(Kcb);
498 
499  /* Set invalid KCB signature */
500  Kcb->Signature = CM_KCB_INVALID_SIGNATURE;
501 
502  /* Free the KCB as well */
504 
505  /* Check if we have a parent */
506  if (Parent)
507  {
508  /* Dereference the parent */
509  LockHeldExclusively ?
510  CmpDereferenceKeyControlBlockWithLock(Parent,LockHeldExclusively) :
512  }
513 }
514 
515 VOID
516 NTAPI
518 {
519  PCM_KEY_NODE KeyNode;
520 
521  /* Make sure we have the exclusive lock */
522  CMP_ASSERT_KCB_LOCK(Kcb);
523 
524  /* Check if there's any cached subkey */
525  if (Kcb->ExtFlags & (CM_KCB_NO_SUBKEY | CM_KCB_SUBKEY_ONE | CM_KCB_SUBKEY_HINT))
526  {
527  /* Check if there's a hint */
528  if (Kcb->ExtFlags & (CM_KCB_SUBKEY_HINT))
529  {
530  /* Kill it */
531  CmpFree(Kcb->IndexHint, 0);
532  }
533 
534  /* Remove subkey flags */
535  Kcb->ExtFlags &= ~(CM_KCB_NO_SUBKEY | CM_KCB_SUBKEY_ONE | CM_KCB_SUBKEY_HINT);
536  }
537 
538  /* Check if there's no linked cell */
539  if (Kcb->KeyCell == HCELL_NIL)
540  {
541  /* Make sure it's a delete */
542  ASSERT(Kcb->Delete);
543  KeyNode = NULL;
544  }
545  else
546  {
547  /* Get the key node */
548  KeyNode = (PCM_KEY_NODE)HvGetCell(Kcb->KeyHive, Kcb->KeyCell);
549  }
550 
551  /* Check if we got the node */
552  if (!KeyNode)
553  {
554  /* We didn't, mark the cached data invalid */
555  Kcb->ExtFlags |= CM_KCB_INVALID_CACHED_INFO;
556  }
557  else
558  {
559  /* We have a keynode, update subkey counts */
560  Kcb->ExtFlags &= ~CM_KCB_INVALID_CACHED_INFO;
561  Kcb->SubKeyCount = KeyNode->SubKeyCounts[Stable] +
562  KeyNode->SubKeyCounts[Volatile];
563 
564  /* Release the cell */
565  HvReleaseCell(Kcb->KeyHive, Kcb->KeyCell);
566  }
567 }
568 
569 VOID
570 NTAPI
572 {
573  LONG OldRefCount, NewRefCount;
574  ULONG ConvKey;
576  "%s - Dereferencing KCB: %p\n", __FUNCTION__, Kcb);
577 
578  /* Get the ref count and update it */
579  OldRefCount = *(PLONG)&Kcb->RefCount;
580  NewRefCount = OldRefCount - 1;
581 
582  /* Check if we still have references */
583  if ((NewRefCount & 0xFFFF) > 0)
584  {
585  /* Do the dereference */
586  if (InterlockedCompareExchange((PLONG)&Kcb->RefCount,
587  NewRefCount,
588  OldRefCount) == OldRefCount)
589  {
590  /* We'de done */
591  return;
592  }
593  }
594 
595  /* Save the key */
596  ConvKey = Kcb->ConvKey;
597 
598  /* Do the dereference inside the lock */
601  CmpReleaseKcbLockByKey(ConvKey);
602 }
603 
604 VOID
605 NTAPI
607  IN BOOLEAN LockHeldExclusively)
608 {
610  "%s - Dereferencing KCB: %p\n", __FUNCTION__, Kcb);
611 
612  /* Sanity check */
613  ASSERT_KCB_VALID(Kcb);
614 
615  /* Check if this is the last reference */
616  if ((InterlockedDecrement((PLONG)&Kcb->RefCount) & 0xFFFF) == 0)
617  {
618  /* Make sure we have the exclusive lock */
619  CMP_ASSERT_KCB_LOCK(Kcb);
620 
621  /* Check if we should do a direct delete */
622  if (((CmpHoldLazyFlush) &&
623  !(Kcb->ExtFlags & CM_KCB_SYM_LINK_FOUND) &&
624  !(Kcb->Flags & KEY_SYM_LINK)) ||
625  (Kcb->ExtFlags & CM_KCB_NO_DELAY_CLOSE) ||
626  (Kcb->Delete))
627  {
628  /* Clean up the KCB*/
629  CmpCleanUpKcbCacheWithLock(Kcb, LockHeldExclusively);
630  }
631  else
632  {
633  /* Otherwise, use delayed close */
634  CmpAddToDelayedClose(Kcb, LockHeldExclusively);
635  }
636  }
637 }
638 
639 VOID
640 NTAPI
642 {
643  /* Initialize the list */
644  InitializeListHead(&Kcb->KeyBodyListHead);
645 
646  /* Clear the bodies */
647  Kcb->KeyBodyArray[0] =
648  Kcb->KeyBodyArray[1] =
649  Kcb->KeyBodyArray[2] =
650  Kcb->KeyBodyArray[3] = NULL;
651 }
652 
654 NTAPI
659  IN ULONG Flags,
661 {
662  PCM_KEY_CONTROL_BLOCK Kcb, FoundKcb = NULL;
664  ULONG ConvKey = 0, i;
665  BOOLEAN IsFake, HashLock;
666  PWCHAR p;
667 
668  /* Make sure we own this hive in case it's being unloaded */
669  if ((Hive->HiveFlags & HIVE_IS_UNLOADING) &&
670  (((PCMHIVE)Hive)->CreatorOwner != KeGetCurrentThread()))
671  {
672  /* Fail */
673  return NULL;
674  }
675 
676  /* Check if this is a fake KCB */
677  IsFake = Flags & CMP_CREATE_FAKE_KCB ? TRUE : FALSE;
678 
679  /* If we have a parent, use its ConvKey */
680  if (Parent) ConvKey = Parent->ConvKey;
681 
682  /* Make a copy of the name */
683  NodeName = *KeyName;
684 
685  /* Remove leading slash */
686  while ((NodeName.Length) && (*NodeName.Buffer == OBJ_NAME_PATH_SEPARATOR))
687  {
688  /* Move the buffer by one */
689  NodeName.Buffer++;
690  NodeName.Length -= sizeof(WCHAR);
691  }
692 
693  /* Make sure we didn't get just a slash or something */
694  ASSERT(NodeName.Length > 0);
695 
696  /* Now setup the hash */
697  p = NodeName.Buffer;
698  for (i = 0; i < NodeName.Length; i += sizeof(WCHAR))
699  {
700  /* Make sure it's a valid character */
701  if (*p != OBJ_NAME_PATH_SEPARATOR)
702  {
703  /* Add this key to the hash */
704  ConvKey = 37 * ConvKey + RtlUpcaseUnicodeChar(*p);
705  }
706 
707  /* Move on */
708  p++;
709  }
710 
711  /* Allocate the KCB */
713  if (!Kcb) return NULL;
714 
715  /* Initailize the key list */
717 
718  /* Set it up */
720  Kcb->Delete = FALSE;
721  Kcb->RefCount = 1;
722  Kcb->KeyHive = Hive;
723  Kcb->KeyCell = Index;
724  Kcb->ConvKey = ConvKey;
726  Kcb->InDelayClose = 0;
727  ASSERT_KCB_VALID(Kcb);
728 
729  /* Check if we have two hash entires */
730  HashLock = Flags & CMP_LOCK_HASHES_FOR_KCB ? TRUE : FALSE;
731  if (!HashLock)
732  {
733  /* It's not locked, do we have a parent? */
734  if (Parent)
735  {
736  /* Lock the parent KCB and ourselves */
737  CmpAcquireTwoKcbLocksExclusiveByKey(ConvKey, Parent->ConvKey);
738  }
739  else
740  {
741  /* Lock only ourselves */
743  }
744  }
745 
746  /* Check if we already have a KCB */
747  FoundKcb = CmpInsertKeyHash(&Kcb->KeyHash, IsFake);
748  if (FoundKcb)
749  {
750  /* Sanity check */
751  ASSERT(!FoundKcb->Delete);
753 
754  /* Free the one we allocated and reference this one */
756  ASSERT_KCB_VALID(FoundKcb);
757  Kcb = FoundKcb;
758  if (!CmpReferenceKeyControlBlock(Kcb))
759  {
760  /* We got too many handles */
761  ASSERT(Kcb->RefCount + 1 != 0);
762  Kcb = NULL;
763  }
764  else
765  {
766  /* Check if we're not creating a fake one, but it used to be fake */
767  if ((Kcb->ExtFlags & CM_KCB_KEY_NON_EXIST) && !(IsFake))
768  {
769  /* Set the hive and cell */
770  Kcb->KeyHive = Hive;
771  Kcb->KeyCell = Index;
772 
773  /* This means that our current information is invalid */
775  }
776 
777  /* Check if we didn't have any valid data */
778  if (!(Kcb->ExtFlags & (CM_KCB_NO_SUBKEY |
781  {
782  /* Calculate the index hint */
783  Kcb->SubKeyCount = Node->SubKeyCounts[Stable] +
784  Node->SubKeyCounts[Volatile];
785 
786  /* Cached information is now valid */
788  }
789 
790  /* Setup the other data */
791  Kcb->KcbLastWriteTime = Node->LastWriteTime;
792  Kcb->KcbMaxNameLen = (USHORT)Node->MaxNameLen;
793  Kcb->KcbMaxValueNameLen = (USHORT)Node->MaxValueNameLen;
794  Kcb->KcbMaxValueDataLen = Node->MaxValueDataLen;
795  }
796  }
797  else
798  {
799  /* No KCB, do we have a parent? */
800  if (Parent)
801  {
802  /* Reference the parent */
803  if (((Parent->TotalLevels + 1) < 512) &&
805  {
806  /* Link it */
807  Kcb->ParentKcb = Parent;
808  Kcb->TotalLevels = Parent->TotalLevels + 1;
809  }
810  else
811  {
812  /* Remove the KCB and free it */
816  Kcb = NULL;
817  }
818  }
819  else
820  {
821  /* No parent, this is the root node */
822  Kcb->ParentKcb = NULL;
823  Kcb->TotalLevels = 1;
824  }
825 
826  /* Check if we have a KCB */
827  if (Kcb)
828  {
829  /* Get the NCB */
831  if (Kcb->NameBlock)
832  {
833  /* Fill it out */
834  Kcb->ValueCache.Count = Node->ValueList.Count;
835  Kcb->ValueCache.ValueList = Node->ValueList.List;
836  Kcb->Flags = Node->Flags;
837  Kcb->ExtFlags = 0;
839 
840  /* Remember if this is a fake key */
841  if (IsFake) Kcb->ExtFlags |= CM_KCB_KEY_NON_EXIST;
842 
843  /* Setup the other data */
844  Kcb->SubKeyCount = Node->SubKeyCounts[Stable] +
845  Node->SubKeyCounts[Volatile];
846  Kcb->KcbLastWriteTime = Node->LastWriteTime;
847  Kcb->KcbMaxNameLen = (USHORT)Node->MaxNameLen;
848  Kcb->KcbMaxValueNameLen = (USHORT)Node->MaxValueNameLen;
849  Kcb->KcbMaxValueDataLen = (USHORT)Node->MaxValueDataLen;
850  }
851  else
852  {
853  /* Dereference the KCB */
855 
856  /* Remove the KCB and free it */
860  Kcb = NULL;
861  }
862  }
863  }
864 
865  /* Check if this is a KCB inside a frozen hive */
866  if ((Kcb) && (((PCMHIVE)Hive)->Frozen) && (!(Kcb->Flags & KEY_SYM_LINK)))
867  {
868  /* Don't add these to the delay close */
870  }
871 
872  /* Sanity check */
873  ASSERT((!Kcb) || (Kcb->Delete == FALSE));
874 
875  /* Check if we had locked the hashes */
876  if (!HashLock)
877  {
878  /* We locked them manually, do we have a parent? */
879  if (Parent)
880  {
881  /* Unlock the parent KCB and ourselves */
882  CmpReleaseTwoKcbLockByKey(ConvKey, Parent->ConvKey);
883  }
884  else
885  {
886  /* Unlock only ourselves */
887  CmpReleaseKcbLockByKey(ConvKey);
888  }
889  }
890 
891  /* Return the KCB */
892  return Kcb;
893 }
894 
896 NTAPI
898 {
900  ULONG i;
901  USHORT NameLength;
902  PCM_KEY_CONTROL_BLOCK MyKcb;
903  PCM_KEY_NODE KeyNode;
904  BOOLEAN DeletedKey = FALSE;
905  PWCHAR TargetBuffer, CurrentNameW;
906  PUCHAR CurrentName;
907 
908  /* Calculate how much size our key name is going to occupy */
909  NameLength = 0;
910  MyKcb = Kcb;
911 
912  while (MyKcb)
913  {
914  /* Add length of the name */
915  if (!MyKcb->NameBlock->Compressed)
916  {
917  NameLength += MyKcb->NameBlock->NameLength;
918  }
919  else
920  {
921  NameLength += CmpCompressedNameSize(MyKcb->NameBlock->Name,
922  MyKcb->NameBlock->NameLength);
923  }
924 
925  /* Sum up the separator too */
926  NameLength += sizeof(WCHAR);
927 
928  /* Go to the parent KCB */
929  MyKcb = MyKcb->ParentKcb;
930  }
931 
932  /* Allocate the unicode string now */
933  KeyName = CmpAllocate(NameLength + sizeof(UNICODE_STRING),
934  TRUE,
935  TAG_CM);
936 
937  if (!KeyName) return NULL;
938 
939  /* Set it up */
940  KeyName->Buffer = (PWSTR)(KeyName + 1);
941  KeyName->Length = NameLength;
942  KeyName->MaximumLength = NameLength;
943 
944  /* Loop the keys again, now adding names */
945  NameLength = 0;
946  MyKcb = Kcb;
947 
948  while (MyKcb)
949  {
950  /* Sanity checks for deleted and fake keys */
951  if ((!MyKcb->KeyCell && !MyKcb->Delete) ||
952  !MyKcb->KeyHive ||
954  {
955  /* Failure */
956  CmpFree(KeyName, 0);
957  return NULL;
958  }
959 
960  /* Try to get the name from the keynode,
961  if the key is not deleted */
962  if (!DeletedKey && !MyKcb->Delete)
963  {
964  KeyNode = HvGetCell(MyKcb->KeyHive, MyKcb->KeyCell);
965 
966  if (!KeyNode)
967  {
968  /* Failure */
969  CmpFree(KeyName, 0);
970  return NULL;
971  }
972  }
973  else
974  {
975  /* The key was deleted */
976  KeyNode = NULL;
977  DeletedKey = TRUE;
978  }
979 
980  /* Get the pointer to the beginning of the current key name */
981  NameLength += (MyKcb->NameBlock->NameLength + 1) * sizeof(WCHAR);
982  TargetBuffer = &KeyName->Buffer[(KeyName->Length - NameLength) / sizeof(WCHAR)];
983 
984  /* Add a separator */
985  TargetBuffer[0] = OBJ_NAME_PATH_SEPARATOR;
986 
987  /* Add the name, but remember to go from the end to the beginning */
988  if (!MyKcb->NameBlock->Compressed)
989  {
990  /* Get the pointer to the name (from the keynode, if possible) */
991  if ((MyKcb->Flags & (KEY_HIVE_ENTRY | KEY_HIVE_EXIT)) ||
992  !KeyNode)
993  {
994  CurrentNameW = MyKcb->NameBlock->Name;
995  }
996  else
997  {
998  CurrentNameW = KeyNode->Name;
999  }
1000 
1001  /* Copy the name */
1002  for (i=0; i < MyKcb->NameBlock->NameLength; i++)
1003  {
1004  TargetBuffer[i+1] = *CurrentNameW;
1005  CurrentNameW++;
1006  }
1007  }
1008  else
1009  {
1010  /* Get the pointer to the name (from the keynode, if possible) */
1011  if ((MyKcb->Flags & (KEY_HIVE_ENTRY | KEY_HIVE_EXIT)) ||
1012  !KeyNode)
1013  {
1014  CurrentName = (PUCHAR)MyKcb->NameBlock->Name;
1015  }
1016  else
1017  {
1018  CurrentName = (PUCHAR)KeyNode->Name;
1019  }
1020 
1021  /* Copy the name */
1022  for (i=0; i < MyKcb->NameBlock->NameLength; i++)
1023  {
1024  TargetBuffer[i+1] = (WCHAR)*CurrentName;
1025  CurrentName++;
1026  }
1027  }
1028 
1029  /* Release the cell, if needed */
1030  if (KeyNode) HvReleaseCell(MyKcb->KeyHive, MyKcb->KeyCell);
1031 
1032  /* Go to the parent KCB */
1033  MyKcb = MyKcb->ParentKcb;
1034  }
1035 
1036  /* Return resulting buffer (both UNICODE_STRING and
1037  its buffer following it) */
1038  return KeyName;
1039 }
1040 
1041 VOID
1042 NTAPI
1044  IN ULONG Flags)
1045 {
1046  ULONG i;
1047 
1048  /* Sanity check */
1049  ASSERT(KeyBody->KeyControlBlock != NULL);
1050 
1051  /* Initialize the list entry */
1052  InitializeListHead(&KeyBody->KeyBodyList);
1053 
1054  /* Check if we can use the parent KCB array */
1055  for (i = 0; i < 4; i++)
1056  {
1057  /* Add it into the list */
1058  if (!InterlockedCompareExchangePointer((PVOID*)&KeyBody->KeyControlBlock->
1059  KeyBodyArray[i],
1060  KeyBody,
1061  NULL))
1062  {
1063  /* Added */
1064  return;
1065  }
1066  }
1067 
1068  /* Array full, check if we need to unlock the KCB */
1070  {
1071  /* It's shared, so release the KCB shared lock */
1072  CmpReleaseKcbLock(KeyBody->KeyControlBlock);
1074  }
1075 
1076  /* Check if we need to lock the KCB */
1078  {
1079  /* Acquire the lock */
1080  CmpAcquireKcbLockExclusive(KeyBody->KeyControlBlock);
1081  }
1082 
1083  /* Make sure we have the exclusive lock */
1084  CMP_ASSERT_KCB_LOCK(KeyBody->KeyControlBlock);
1085 
1086  /* Do the insert */
1087  InsertTailList(&KeyBody->KeyControlBlock->KeyBodyListHead,
1088  &KeyBody->KeyBodyList);
1089 
1090  /* Check if we did a manual lock */
1093  {
1094  /* Release the lock */
1095  CmpReleaseKcbLock(KeyBody->KeyControlBlock);
1096  }
1097 }
1098 
1099 VOID
1100 NTAPI
1102  IN BOOLEAN LockHeld)
1103 {
1104  ULONG i;
1105 
1106  /* Sanity check */
1107  ASSERT(KeyBody->KeyControlBlock != NULL);
1108 
1109  /* Check if we can use the parent KCB array */
1110  for (i = 0; i < 4; i++)
1111  {
1112  /* Add it into the list */
1113  if (InterlockedCompareExchangePointer((VOID*)&KeyBody->KeyControlBlock->
1114  KeyBodyArray[i],
1115  NULL,
1116  KeyBody) == KeyBody)
1117  {
1118  /* Removed */
1119  return;
1120  }
1121  }
1122 
1123  /* Sanity checks */
1124  ASSERT(IsListEmpty(&KeyBody->KeyControlBlock->KeyBodyListHead) == FALSE);
1125  ASSERT(IsListEmpty(&KeyBody->KeyBodyList) == FALSE);
1126 
1127  /* Lock the KCB */
1128  if (!LockHeld) CmpAcquireKcbLockExclusive(KeyBody->KeyControlBlock);
1129  CMP_ASSERT_KCB_LOCK(KeyBody->KeyControlBlock);
1130 
1131  /* Remove the entry */
1132  RemoveEntryList(&KeyBody->KeyBodyList);
1133 
1134  /* Unlock it it if we did a manual lock */
1135  if (!LockHeld) CmpReleaseKcbLock(KeyBody->KeyControlBlock);
1136 }
1137 
1138 VOID
1139 NTAPI
1141  IN BOOLEAN LockHeld)
1142 {
1143  PLIST_ENTRY NextEntry, ListHead;
1144  PCM_KEY_BODY KeyBody;
1145 
1146  /* Sanity check */
1148  while (TRUE)
1149  {
1150  /* Is the list empty? */
1151  ListHead = &Kcb->KeyBodyListHead;
1152  if (!IsListEmpty(ListHead))
1153  {
1154  /* Loop the list */
1155  NextEntry = ListHead->Flink;
1156  while (NextEntry != ListHead)
1157  {
1158  /* Get the key body */
1159  KeyBody = CONTAINING_RECORD(NextEntry, CM_KEY_BODY, KeyBodyList);
1160  ASSERT(KeyBody->Type == CM_KEY_BODY_TYPE);
1161 
1162  /* Check for notifications */
1163  if (KeyBody->NotifyBlock)
1164  {
1165  /* Is the lock held? */
1166  if (LockHeld)
1167  {
1168  /* Flush it */
1169  CmpFlushNotify(KeyBody, LockHeld);
1170  ASSERT(KeyBody->NotifyBlock == NULL);
1171  continue;
1172  }
1173 
1174  /* Lock isn't held, so we need to take a reference */
1175  if (ObReferenceObjectSafe(KeyBody))
1176  {
1177  /* Now we can flush */
1178  CmpFlushNotify(KeyBody, LockHeld);
1179  ASSERT(KeyBody->NotifyBlock == NULL);
1180 
1181  /* Release the reference we took */
1183  continue;
1184  }
1185  }
1186 
1187  /* Try the next entry */
1188  NextEntry = NextEntry->Flink;
1189  }
1190  }
1191 
1192  /* List has been parsed, exit */
1193  break;
1194  }
1195 }
_Must_inspect_result_ _Out_ PNDIS_STATUS _In_ NDIS_HANDLE _In_ ULONG _Out_ PNDIS_STRING KeyName
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struct _CM_KEY_CONTROL_BLOCK * ParentKcb
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ACPI_PHYSICAL_ADDRESS ACPI_SIZE BOOLEAN Warn BOOLEAN Physical UINT32 ACPI_TABLE_HEADER *OutTableHeader ACPI_TABLE_HEADER **OutTable ACPI_HANDLE UINT32 ACPI_WALK_CALLBACK ACPI_WALK_CALLBACK void void **ReturnValue UINT32 ACPI_BUFFER *RetPathPtr ACPI_OBJECT_HANDLER void *Data ACPI_OBJECT_HANDLER void **Data ACPI_STRING ACPI_OBJECT_LIST ACPI_BUFFER *ReturnObjectBuffer ACPI_DEVICE_INFO **ReturnBuffer ACPI_HANDLE Parent
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#define InsertTailList(ListHead, Entry)
BOOLEAN CmpHoldLazyFlush
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NTSYSAPI WCHAR NTAPI RtlUpcaseUnicodeChar(WCHAR Source)
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VOID NTAPI CmpCleanUpKcbCacheWithLock(IN PCM_KEY_CONTROL_BLOCK Kcb, IN BOOLEAN LockHeldExclusively)
Definition: cmkcbncb.c:476
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_Must_inspect_result_ _In_ ULONG Flags
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GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
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NTSTATUS(* NTAPI)(IN PFILE_FULL_EA_INFORMATION EaBuffer, IN ULONG EaLength, OUT PULONG ErrorOffset)
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unsigned char BOOLEAN
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#define CmpAcquireNcbLockExclusiveByKey(k)
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BOOLEAN Compressed
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PFLT_MESSAGE_WAITER_QUEUE CONTAINING_RECORD(Csq, DEVICE_EXTENSION, IrpQueue)) -> WaiterQ.mLock) _IRQL_raises_(DISPATCH_LEVEL) VOID NTAPI FltpAcquireMessageWaiterLock(_In_ PIO_CSQ Csq, _Out_ PKIRQL Irql)
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#define PCHAR
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if(!(yy_init))
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__wchar_t WCHAR
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#define CM_KCB_SUBKEY_HINT
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_In_ ULONG _In_ ULONG _In_ ULONG Length
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#define TAG_CM
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static const char * NodeName(const NOTIFICATIONLIST *item)
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#define InterlockedDecrement
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struct _CM_NAME_HASH_TABLE_ENTRY CM_NAME_HASH_TABLE_ENTRY
PHHIVE KeyHive
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IN OUT PLONG IN OUT PLONG Addend IN OUT PLONG IN LONG IN OUT PLONG IN LONG Increment IN PNDIS_RW_LOCK Lock
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Definition: cmkcbncb.c:26
INIT_FUNCTION VOID NTAPI CmpInitializeDelayedCloseTable(VOID)
Definition: cmdelay.c:191
#define CM_KCB_KEY_NON_EXIST
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WCHAR Name[ANYSIZE_ARRAY]
Definition: cm.h:250
Definition: cm.h:153
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Definition: cm.h:241
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Definition: cmkcbncb.c:78
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Definition: cmkcbncb.c:1140
#define KEY_SYM_LINK
Definition: cmdata.h:34
#define InterlockedIncrement
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Definition: cm_x.h:140
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Definition: cm_x.h:189
unsigned short USHORT
Definition: pedump.c:61
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Definition: cmname.c:109
#define InitializeListHead(ListHead)
Definition: env_spec_w32.h:944
#define CMP_GET_CACHED_CELL(c)
Definition: cm_x.h:34
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Definition: cmalloc.c:53
#define FIELD_OFFSET(t, f)
Definition: typedefs.h:254
ULONG SubKeyCount
Definition: cm.h:289
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Definition: cmkcbncb.c:641
#define CmpIsKcbLockedExclusive(k)
Definition: cm_x.h:82
VOID NTAPI CmpDereferenceKeyControlBlockWithLock(IN PCM_KEY_CONTROL_BLOCK Kcb, IN BOOLEAN LockHeldExclusively)
Definition: cmkcbncb.c:606
USHORT KcbMaxNameLen
Definition: cm.h:299
PCM_KEY_HASH Entry
Definition: cm.h:157
unsigned int ULONG
Definition: retypes.h:1
ULONG RefCount
Definition: cm.h:261
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Definition: cmkcbncb.c:1101
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:261
CM_KEY_HASH KeyHash
Definition: cm.h:272
uint32_t * PULONG_PTR
Definition: typedefs.h:63
VOID NTAPI CmpCleanUpKcbValueCache(IN PCM_KEY_CONTROL_BLOCK Kcb)
Definition: cmkcbncb.c:431
GLfloat GLfloat p
Definition: glext.h:8902
#define KeGetCurrentThread
Definition: hal.h:44
ULONG Type
Definition: cm.h:228
FORCEINLINE VOID CmpAcquireKcbLockExclusive(PCM_KEY_CONTROL_BLOCK Kcb)
Definition: cm_x.h:102
#define CM_KCB_SIGNATURE
Definition: cm.h:48
#define __FUNCTION__
Definition: types.h:112
struct _CM_NAME_HASH * NextHash
Definition: cm.h:166
signed int * PLONG
Definition: retypes.h:5
CM_NAME_HASH NameHash
Definition: cm.h:244
#define CHAR(Char)
ULONG KcbMaxValueDataLen
Definition: cm.h:301
USHORT NTAPI CmpCompressedNameSize(IN PWCHAR Name, IN ULONG Length)
Definition: cmname.c:95
VOID NTAPI CmpAcquireTwoKcbLocksExclusiveByKey(IN ULONG ConvKey1, IN ULONG ConvKey2)
Definition: cmsysini.c:2021
base of all file and directory entries
Definition: entries.h:82
VOID NTAPI KeBugCheckEx(_In_ ULONG BugCheckCode, _In_ ULONG_PTR BugCheckParameter1, _In_ ULONG_PTR BugCheckParameter2, _In_ ULONG_PTR BugCheckParameter3, _In_ ULONG_PTR BugCheckParameter4)
Definition: rtlcompat.c:107
Definition: cm.h:391
#define ASSERT_KCB_VALID(k)
Definition: cm_x.h:76
struct _CM_KEY_HASH * NextHash
Definition: cm.h:145
#define CM_KCB_SYM_LINK_FOUND
Definition: cm.h:57
Definition: dlist.c:348
PCM_NAME_CONTROL_BLOCK NTAPI CmpGetNameControlBlock(IN PUNICODE_STRING NodeName)
Definition: cmkcbncb.c:148
#define KEY_HIVE_ENTRY
Definition: cmdata.h:32