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- Merge KCB/NCB code (and related delay alloc/free implementation) from cm-rewrite branch. Only "used" in one call so it shouldn't affect anything.

Browse source 
svn path=/trunk/; revision=29954
This commit is contained in:
Aleksey Bragin 2007-10-29 14:44:26 +00:00
parent 4318124a73
commit babcc56c4a
8 changed files with 1497 additions and 134 deletions
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4
reactos/ntoskrnl/cm/registry.c
View file

@ -226,8 +226,8 @@ CmpRosGetHardwareHive(OUT PULONG Length)
/* Precondition: Must not hold the hive lock CmpRegistryLock */
VOID
NTAPI
EnlistKeyBodyWithKCB(IN PKEY_OBJECT KeyObject,
IN ULONG Flags)
EnlistKeyBodyWithKeyObject(IN PKEY_OBJECT KeyObject,
IN ULONG Flags)
{
/* Acquire hive lock */
KeEnterCriticalRegion();

68
reactos/ntoskrnl/config/cm.h
View file

@ -308,6 +308,15 @@ typedef struct _CM_ALLOC_PAGE
PVOID AllocPage;
} CM_ALLOC_PAGE, *PCM_ALLOC_PAGE;
//
// Allocation Page Entry
//
typedef struct _CM_DELAY_ALLOC
{
LIST_ENTRY ListEntry;
PCM_KEY_CONTROL_BLOCK Kcb;
} CM_DELAY_ALLOC, *PCM_DELAY_ALLOC;
//
// Delayed Close Entry
//
@ -788,6 +797,9 @@ CmpUnlockRegistry(
VOID
);
//
// Delay Functions
//
PVOID
NTAPI
CmpAllocateDelayItem(
@ -800,6 +812,29 @@ CmpFreeDelayItem(
PVOID Entry
);
VOID
NTAPI
CmpDelayDerefKeyControlBlock(
IN PCM_KEY_CONTROL_BLOCK Kcb
);
VOID
NTAPI
CmpAddToDelayedClose(
IN PCM_KEY_CONTROL_BLOCK Kcb,
IN BOOLEAN LockHeldExclusively
);
VOID
NTAPI
CmpRemoveFromDelayedClose(IN PCM_KEY_CONTROL_BLOCK Kcb);
VOID
NTAPI
CmpInitializeDelayedCloseTable(
VOID
);
//
// KCB Functions
//
@ -814,9 +849,28 @@ CmpCreateKeyControlBlock(
IN PUNICODE_STRING KeyName
);
PCM_KEY_CONTROL_BLOCK
NTAPI
CmpAllocateKeyControlBlock(
VOID
);
VOID
NTAPI
CmpDereferenceKcbWithLock(
CmpFreeKeyControlBlock(
IN PCM_KEY_CONTROL_BLOCK Kcb
);
VOID
NTAPI
CmpCleanUpKcbCacheWithLock(
IN PCM_KEY_CONTROL_BLOCK Kcb,
IN BOOLEAN LockHeldExclusively
);
VOID
NTAPI
CmpDereferenceKeyControlBlockWithLock(
IN PCM_KEY_CONTROL_BLOCK Kcb,
IN BOOLEAN LockHeldExclusively
);
@ -824,14 +878,17 @@ CmpDereferenceKcbWithLock(
VOID
NTAPI
EnlistKeyBodyWithKCB(
#if 0
IN PCM_KEY_BODY KeyObject,
#else
IN PKEY_OBJECT KeyObject,
#endif
IN ULONG Flags
);
VOID
NTAPI
EnlistKeyBodyWithKeyObject(
IN PKEY_OBJECT KeyObject,
IN ULONG Flags
);
NTSTATUS
NTAPI
CmpFreeKeyByCell(
@ -1276,6 +1333,7 @@ extern HANDLE CmpRegistryRootHandle;
extern BOOLEAN ExpInTextModeSetup;
extern BOOLEAN InitIsWinPEMode;
extern ULONG CmpHashTableSize;
extern ULONG CmpDelayedCloseSize, CmpDelayedCloseIndex;
//
// Inlined functions

30
reactos/ntoskrnl/config/cm_x.h
View file

@ -199,6 +199,18 @@ CmpTryToConvertKcbSharedToExclusive(IN PCM_KEY_CONTROL_BLOCK k)
(k)).Lock); \
}
//
// Converts a KCB lock
//
FORCEINLINE
VOID
CmpConvertKcbSharedToExclusive(IN PCM_KEY_CONTROL_BLOCK k)
{
ASSERT(CmpIsKcbLockedExclusive(k) == FALSE);
CmpReleaseKcbLock(k);
CmpAcquireKcbLockExclusive(k);
}
//
// Exclusively acquires an NCB
//
@ -208,6 +220,15 @@ CmpTryToConvertKcbSharedToExclusive(IN PCM_KEY_CONTROL_BLOCK k)
(n)->ConvKey).Lock); \
}
//
// Exclusively acquires an NCB by key
//
#define CmpAcquireNcbLockExclusiveByKey(k) \
{ \
ExAcquirePushLockExclusive(&GET_HASH_ENTRY(CmpNameCacheTable, \
(k)).Lock); \
}
//
// Releases an exlusively or shared acquired NCB
//
@ -216,3 +237,12 @@ CmpTryToConvertKcbSharedToExclusive(IN PCM_KEY_CONTROL_BLOCK k)
ExReleasePushLock(&GET_HASH_ENTRY(CmpNameCacheTable, \
(k)->ConvKey).Lock); \
}
//
// Releases an exlusively or shared acquired NCB by key
//
#define CmpReleaseNcbLockByKey(k) \
{ \
ExReleasePushLock(&GET_HASH_ENTRY(CmpNameCacheTable, \
(k)).Lock); \
}

305
reactos/ntoskrnl/config/cmalloc.c Normal file
View file

@ -0,0 +1,305 @@
/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/config/cmalloc.c
* PURPOSE: Routines for allocating and freeing registry structures
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
#include "cm.h"
/* GLOBALS *******************************************************************/
BOOLEAN CmpAllocInited;
KGUARDED_MUTEX CmpAllocBucketLock, CmpDelayAllocBucketLock;
LIST_ENTRY CmpFreeKCBListHead;
KGUARDED_MUTEX CmpDelayAllocBucketLock;
LIST_ENTRY CmpFreeDelayItemsListHead;
/* FUNCTIONS *****************************************************************/
VOID
NTAPI
CmpInitCmPrivateAlloc(VOID)
{
/* Make sure we didn't already do this */
if (!CmpAllocInited)
{
/* Setup the lock and list */
KeInitializeGuardedMutex(&CmpAllocBucketLock);
InitializeListHead(&CmpFreeKCBListHead);
CmpAllocInited = TRUE;
}
}
VOID
NTAPI
CmpInitCmPrivateDelayAlloc(VOID)
{
/* Initialize the delay allocation list and lock */
KeInitializeGuardedMutex(&CmpDelayAllocBucketLock);
InitializeListHead(&CmpFreeDelayItemsListHead);
}
VOID
NTAPI
CmpFreeKeyControlBlock(IN PCM_KEY_CONTROL_BLOCK Kcb)
{
ULONG i;
PCM_ALLOC_PAGE AllocPage;
PAGED_CODE();
/* Sanity checks */
ASSERT(IsListEmpty(&(Kcb->KeyBodyListHead)) == TRUE);
for (i = 0; i < 4; i++) ASSERT(Kcb->KeyBodyArray[i] == NULL);
/* Check if it wasn't privately allocated */
if (!Kcb->PrivateAlloc)
{
/* Free it from the pool */
ExFreePool(Kcb);
return;
}
/* Acquire the private allocation lock */
KeAcquireGuardedMutex(&CmpAllocBucketLock);
/* Sanity check on lock ownership */
ASSERT((GET_HASH_ENTRY(CmpCacheTable, Kcb->ConvKey).Owner ==
KeGetCurrentThread()) ||
(CmpTestRegistryLockExclusive() == TRUE));
/* Add us to the free list */
InsertTailList(&CmpFreeKCBListHead, &Kcb->FreeListEntry);
/* Get the allocation page */
AllocPage = (PCM_ALLOC_PAGE)((ULONG_PTR)Kcb & 0xFFFFF000);
/* Sanity check */
ASSERT(AllocPage->FreeCount != CM_KCBS_PER_PAGE);
/* Increase free count */
if (++AllocPage->FreeCount == CM_KCBS_PER_PAGE)
{
/* Loop all the entries */
for (i = CM_KCBS_PER_PAGE; i; i--)
{
/* Get the KCB */
Kcb = (PVOID)((ULONG_PTR)AllocPage +
FIELD_OFFSET(CM_ALLOC_PAGE, AllocPage) +
i * sizeof(CM_KEY_CONTROL_BLOCK));
/* Remove the entry */
RemoveEntryList(&Kcb->FreeListEntry);
}
/* Free the page */
ExFreePool(AllocPage);
}
/* Release the lock */
KeReleaseGuardedMutex(&CmpAllocBucketLock);
}
PCM_KEY_CONTROL_BLOCK
NTAPI
CmpAllocateKeyControlBlock(VOID)
{
PLIST_ENTRY NextEntry;
PCM_KEY_CONTROL_BLOCK CurrentKcb;
PCM_ALLOC_PAGE AllocPage;
ULONG i;
PAGED_CODE();
/* Check if private allocations are initialized */
if (CmpAllocInited)
{
/* They are, acquire the bucket lock */
KeAcquireGuardedMutex(&CmpAllocBucketLock);
/* See if there's something on the free KCB list */
SearchKcbList:
if (!IsListEmpty(&CmpFreeKCBListHead))
{
/* Remove the entry */
NextEntry = RemoveHeadList(&CmpFreeKCBListHead);
/* Get the KCB */
CurrentKcb = CONTAINING_RECORD(NextEntry,
CM_KEY_CONTROL_BLOCK,
FreeListEntry);
/* Get the allocation page */
AllocPage = (PCM_ALLOC_PAGE)((ULONG_PTR)CurrentKcb & 0xFFFFF000);
/* Decrease the free count */
ASSERT(AllocPage->FreeCount != 0);
AllocPage->FreeCount--;
/* Make sure this KCB is privately allocated */
ASSERT(CurrentKcb->PrivateAlloc == 1);
/* Release the allocation lock */
KeReleaseGuardedMutex(&CmpAllocBucketLock);
/* Return the KCB */
return CurrentKcb;
}
/* Allocate an allocation page */
AllocPage = ExAllocatePoolWithTag(PagedPool, PAGE_SIZE, TAG_CM);
if (AllocPage)
{
/* Set default entries */
AllocPage->FreeCount = CM_KCBS_PER_PAGE;
/* Loop each entry */
for (i = 0; i < CM_KCBS_PER_PAGE; i++)
{
/* Get this entry */
CurrentKcb = (PVOID)((ULONG_PTR)AllocPage +
FIELD_OFFSET(CM_ALLOC_PAGE, AllocPage) +
i * sizeof(CM_KEY_CONTROL_BLOCK));
/* Set it up */
CurrentKcb->PrivateAlloc = TRUE;
CurrentKcb->DelayCloseEntry = NULL;
InsertHeadList(&CmpFreeKCBListHead,
&CurrentKcb->FreeListEntry);
}
/* Now go back and search the list */
goto SearchKcbList;
}
}
/* Allocate a KCB only */
CurrentKcb = ExAllocatePoolWithTag(PagedPool,
sizeof(CM_KEY_CONTROL_BLOCK),
TAG_CM);
if (CurrentKcb)
{
/* Set it up */
CurrentKcb->PrivateAlloc = 0;
CurrentKcb->DelayCloseEntry = NULL;
}
/* Return it */
return CurrentKcb;
}
PVOID
NTAPI
CmpAllocateDelayItem(VOID)
{
PCM_DELAY_ALLOC Entry;
PCM_ALLOC_PAGE AllocPage;
ULONG i;
PLIST_ENTRY NextEntry;
PAGED_CODE();
/* Lock the allocation buckets */
KeAcquireGuardedMutex(&CmpDelayAllocBucketLock);
/* Look for an item on the free list */
SearchList:
if (!IsListEmpty(&CmpFreeDelayItemsListHead))
{
/* Get the current entry in the list */
NextEntry = RemoveHeadList(&CmpFreeDelayItemsListHead);
/* Grab the item */
Entry = CONTAINING_RECORD(NextEntry, CM_DELAY_ALLOC, ListEntry);
/* Clear the list */
Entry->ListEntry.Flink = Entry->ListEntry.Blink = NULL;
/* Grab the alloc page */
AllocPage = (PCM_ALLOC_PAGE)((ULONG_PTR)Entry & 0xFFFFF000);
/* Decrease free entries */
ASSERT(AllocPage->FreeCount != 0);
AllocPage->FreeCount--;
/* Release the lock */
KeReleaseGuardedMutex(&CmpDelayAllocBucketLock);
return Entry;
}
/* Allocate an allocation page */
AllocPage = ExAllocatePoolWithTag(PagedPool, PAGE_SIZE, TAG_CM);
if (AllocPage)
{
/* Set default entries */
AllocPage->FreeCount = CM_DELAYS_PER_PAGE;
/* Loop each entry */
for (i = 0; i < CM_DELAYS_PER_PAGE; i++)
{
/* Get this entry and link it */
Entry = (PVOID)((ULONG_PTR)AllocPage +
FIELD_OFFSET(CM_ALLOC_PAGE, AllocPage) +
i * sizeof(CM_DELAY_ALLOC));
InsertTailList(&CmpFreeDelayItemsListHead,
&Entry->ListEntry);
/* Clear the KCB pointer */
Entry->Kcb = NULL;
}
}
else
{
/* Release the lock */
KeReleaseGuardedMutex(&CmpDelayAllocBucketLock);
return NULL;
}
/* Do the search again */
goto SearchList;
}
VOID
NTAPI
CmpFreeDelayItem(PVOID Entry)
{
PCM_DELAY_ALLOC AllocEntry = (PCM_DELAY_ALLOC)Entry;
PCM_ALLOC_PAGE AllocPage;
ULONG i;
PAGED_CODE();
/* Lock the table */
KeAcquireGuardedMutex(&CmpDelayAllocBucketLock);
/* Add the entry at the end */
InsertTailList(&CmpFreeDelayItemsListHead, &AllocEntry->ListEntry);
/* Get the alloc page */
AllocPage = (PCM_ALLOC_PAGE)((ULONG_PTR)Entry & 0xFFFFF000);
ASSERT(AllocPage->FreeCount != CM_DELAYS_PER_PAGE);
/* Increase the number of free items */
if (++AllocPage->FreeCount == CM_DELAYS_PER_PAGE)
{
/* Page is totally free now, loop each entry */
for (i = 0; i < CM_DELAYS_PER_PAGE; i++)
{
/* Get the entry and unlink it */
AllocEntry = (PVOID)((ULONG_PTR)AllocPage +
FIELD_OFFSET(CM_ALLOC_PAGE, AllocPage) +
i * sizeof(CM_DELAY_ALLOC));
RemoveEntryList(&AllocEntry->ListEntry);
}
/* Now free the page */
ExFreePool(AllocPage);
}
/* Release the lock */
KeReleaseGuardedMutex(&CmpDelayAllocBucketLock);
}

307
reactos/ntoskrnl/config/cmdelay.c Normal file
View file

@ -0,0 +1,307 @@
/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/config/cmdelay.c
* PURPOSE: Routines for handling delay close and allocate.
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
#include "cm.h"
/* GLOBALS *******************************************************************/
WORK_QUEUE_ITEM CmpDelayDerefKCBWorkItem;
LIST_ENTRY CmpFreeDelayItemsListHead;
ULONG CmpDelayedCloseSize = 2048;
ULONG CmpDelayedCloseElements;
KGUARDED_MUTEX CmpDelayedCloseTableLock;
BOOLEAN CmpDelayCloseWorkItemActive;
WORK_QUEUE_ITEM CmpDelayCloseWorkItem;
LIST_ENTRY CmpDelayedLRUListHead;
ULONG CmpDelayCloseIntervalInSeconds = 5;
KDPC CmpDelayCloseDpc;
KTIMER CmpDelayCloseTimer;
KGUARDED_MUTEX CmpDelayDerefKCBLock;
BOOLEAN CmpDelayDerefKCBWorkItemActive;
LIST_ENTRY CmpDelayDerefKCBListHead;
ULONG CmpDelayDerefKCBIntervalInSeconds = 5;
KDPC CmpDelayDerefKCBDpc;
KTIMER CmpDelayDerefKCBTimer;
/* FUNCTIONS *****************************************************************/
VOID
NTAPI
CmpDelayCloseDpcRoutine(IN PKDPC Dpc,
IN PVOID DeferredContext,
IN PVOID SystemArgument1,
IN PVOID SystemArgument2)
{
/* Sanity check */
ASSERT(CmpDelayCloseWorkItemActive);
/* Queue the work item */
ExQueueWorkItem(&CmpDelayCloseWorkItem, DelayedWorkQueue);
}
VOID
NTAPI
CmpDelayCloseWorker(IN PVOID Context)
{
PAGED_CODE();
/* Sanity check */
ASSERT(CmpDelayCloseWorkItemActive);
/* FIXME: TODO */
ASSERT(FALSE);
}
VOID
NTAPI
CmpInitializeDelayedCloseTable(VOID)
{
/* Setup the delayed close lock */
KeInitializeGuardedMutex(&CmpDelayedCloseTableLock);
/* Setup the work item */
ExInitializeWorkItem(&CmpDelayCloseWorkItem, CmpDelayCloseWorker, NULL);
/* Setup the list head */
InitializeListHead(&CmpDelayedLRUListHead);
/* Setup the DPC and its timer */
KeInitializeDpc(&CmpDelayCloseDpc, CmpDelayCloseDpcRoutine, NULL);
KeInitializeTimer(&CmpDelayCloseTimer);
}
VOID
NTAPI
CmpDelayDerefKCBDpcRoutine(IN PKDPC Dpc,
IN PVOID DeferredContext,
IN PVOID SystemArgument1,
IN PVOID SystemArgument2)
{
/* Sanity check */
ASSERT(CmpDelayDerefKCBWorkItemActive);
/* Queue the work item */
ExQueueWorkItem(&CmpDelayDerefKCBWorkItem, DelayedWorkQueue);
}
VOID
NTAPI
CmpDelayDerefKCBWorker(IN PVOID Context)
{
PAGED_CODE();
/* Sanity check */
ASSERT(CmpDelayDerefKCBWorkItemActive);
/* FIXME: TODO */
ASSERT(FALSE);
}
VOID
NTAPI
CmpInitDelayDerefKCBEngine(VOID)
{
/* Initialize lock and list */
KeInitializeGuardedMutex(&CmpDelayDerefKCBLock);
InitializeListHead(&CmpDelayDerefKCBListHead);
/* Setup the work item */
ExInitializeWorkItem(&CmpDelayDerefKCBWorkItem,
CmpDelayDerefKCBWorker,
NULL);
/* Setup the DPC and timer for it */
KeInitializeDpc(&CmpDelayDerefKCBDpc, CmpDelayDerefKCBDpcRoutine, NULL);
KeInitializeTimer(&CmpDelayDerefKCBTimer);
}
VOID
NTAPI
CmpDelayDerefKeyControlBlock(IN PCM_KEY_CONTROL_BLOCK Kcb)
{
USHORT OldRefCount, NewRefCount;
LARGE_INTEGER Timeout;
PCM_DELAY_DEREF_KCB_ITEM Entry;
PAGED_CODE();
/* Get the previous reference count */
OldRefCount = Kcb->RefCount;
/* Write the new one */
NewRefCount = (USHORT)InterlockedCompareExchange((PLONG)&Kcb->RefCount,
OldRefCount - 1,
OldRefCount);
if (NewRefCount != OldRefCount) return;
/* Allocate a delay item */
Entry = CmpAllocateDelayItem();
if (!Entry) return;
/* Set the KCB */
Entry->Kcb = Kcb;
/* Acquire the delayed deref table lock */
KeAcquireGuardedMutex(&CmpDelayDerefKCBLock);
/* Insert the entry into the list */
InsertTailList(&CmpDelayDerefKCBListHead, &Entry->ListEntry);
/* Check if we need to enable anything */
if (!CmpDelayDerefKCBWorkItemActive)
{
/* Yes, we have no work item, setup the interval */
Timeout.QuadPart = CmpDelayDerefKCBIntervalInSeconds * -10000000;
KeSetTimer(&CmpDelayDerefKCBTimer, Timeout, &CmpDelayDerefKCBDpc);
}
/* Release the table lock */
KeReleaseGuardedMutex(&CmpDelayDerefKCBLock);
}
VOID
NTAPI
CmpArmDelayedCloseTimer(VOID)
{
LARGE_INTEGER Timeout;
PAGED_CODE();
/* Setup the interval */
Timeout.QuadPart = CmpDelayCloseIntervalInSeconds * -10000000;
KeSetTimer(&CmpDelayCloseTimer, Timeout, &CmpDelayCloseDpc);
}
VOID
NTAPI
CmpAddToDelayedClose(IN PCM_KEY_CONTROL_BLOCK Kcb,
IN BOOLEAN LockHeldExclusively)
{
ULONG i;
ULONG OldRefCount, NewRefCount;
PCM_DELAYED_CLOSE_ENTRY Entry;
PAGED_CODE();
/* Sanity check */
ASSERT((CmpIsKcbLockedExclusive(Kcb) == TRUE) ||
(CmpTestRegistryLockExclusive() == TRUE));
/* Make sure it's valid */
if (Kcb->DelayedCloseIndex != CmpDelayedCloseSize) ASSERT(FALSE);
/* Sanity checks */
ASSERT(Kcb->RefCount == 0);
ASSERT(IsListEmpty(&Kcb->KeyBodyListHead) == TRUE);
for (i = 0; i < 4; i++) ASSERT(Kcb->KeyBodyArray[i] == NULL);
/* Allocate a delay item */
Entry = CmpAllocateDelayItem();
if (!Entry)
{
/* Cleanup immediately */
CmpCleanUpKcbCacheWithLock(Kcb, LockHeldExclusively);
return;
}
/* Sanity check */
if (Kcb->InDelayClose) ASSERT(FALSE);
/* Get the previous reference count */
OldRefCount = Kcb->InDelayClose;
ASSERT(OldRefCount == 0);
/* Write the new one */
NewRefCount = InterlockedCompareExchange((PLONG)&Kcb->InDelayClose,
1,
OldRefCount);
if (NewRefCount != OldRefCount) ASSERT(FALSE);
/* Reset the delayed close index */
Kcb->DelayedCloseIndex = 0;
/* Set up the close entry */
Kcb->DelayCloseEntry = Entry;
Entry->KeyControlBlock = Kcb;
/* Increase the number of elements */
InterlockedIncrement((PLONG)&CmpDelayedCloseElements);
/* Acquire the delayed close table lock */
KeAcquireGuardedMutex(&CmpDelayedCloseTableLock);
/* Insert the entry into the list */
InsertHeadList(&CmpDelayedLRUListHead, &Entry->DelayedLRUList);
/* Check if we need to enable anything */
if ((CmpDelayedCloseElements > CmpDelayedCloseSize) &&
!(CmpDelayCloseWorkItemActive))
{
/* Yes, we have too many elements to close, and no work item */
CmpArmDelayedCloseTimer();
}
/* Release the table lock */
KeReleaseGuardedMutex(&CmpDelayedCloseTableLock);
}
VOID
NTAPI
CmpRemoveFromDelayedClose(IN PCM_KEY_CONTROL_BLOCK Kcb)
{
PCM_DELAYED_CLOSE_ENTRY Entry;
ULONG NewRefCount, OldRefCount;
PAGED_CODE();
/* Sanity checks */
ASSERT((CmpIsKcbLockedExclusive(Kcb) == TRUE) ||
(CmpTestRegistryLockExclusive() == TRUE));
if (Kcb->DelayedCloseIndex == CmpDelayedCloseSize) ASSERT(FALSE);
/* Get the entry and lock the table */
Entry = Kcb->DelayCloseEntry;
ASSERT(Entry);
KeAcquireGuardedMutex(&CmpDelayedCloseTableLock);
/* Remove the entry */
RemoveEntryList(&Entry->DelayedLRUList);
/* Release the lock */
KeReleaseGuardedMutex(&CmpDelayedCloseTableLock);
/* Free the entry */
CmpFreeDelayItem(Entry);
/* Reduce the number of elements */
InterlockedDecrement((PLONG)&CmpDelayedCloseElements);
/* Sanity check */
if (!Kcb->InDelayClose) ASSERT(FALSE);
/* Get the old reference count */
OldRefCount = Kcb->InDelayClose;
ASSERT(OldRefCount == 1);
/* Set it to 0 */
NewRefCount = InterlockedCompareExchange((PLONG)&Kcb->InDelayClose,
0,
OldRefCount);
if (NewRefCount != OldRefCount) ASSERT(FALSE);
/* Remove the link to the entry */
Kcb->DelayCloseEntry = NULL;
/* Set new delay size and remove the delete flag */
Kcb->DelayedCloseIndex = CmpDelayedCloseSize;
}

828
reactos/ntoskrnl/config/cmkcbncb.c
View file

@ -2,16 +2,16 @@
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/config/cmkcbncb.c
* PURPOSE: Configuration Manager - Key Control and Name Control Blocks
* PURPOSE: Routines for handling KCBs, NCBs, as well as key hashes.
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include "ntoskrnl.h"
#include "cm.h"
#include <ntoskrnl.h>
#define NDEBUG
#include "debug.h"
#include <debug.h>
#include "cm.h"
/* GLOBALS *******************************************************************/
@ -19,159 +19,530 @@ ULONG CmpHashTableSize = 2048;
PCM_KEY_HASH_TABLE_ENTRY CmpCacheTable;
PCM_NAME_HASH_TABLE_ENTRY CmpNameCacheTable;
LIST_ENTRY CmpFreeKCBListHead;
BOOLEAN CmpAllocInited;
KGUARDED_MUTEX CmpAllocBucketLock, CmpDelayAllocBucketLock;
WORK_QUEUE_ITEM CmpDelayDerefKCBWorkItem;
LIST_ENTRY CmpFreeDelayItemsListHead;
ULONG CmpDelayedCloseSize;
ULONG CmpDelayedCloseElements;
KGUARDED_MUTEX CmpDelayedCloseTableLock;
BOOLEAN CmpDelayCloseWorkItemActive;
WORK_QUEUE_ITEM CmpDelayCloseWorkItem;
LIST_ENTRY CmpDelayedLRUListHead;
ULONG CmpDelayCloseIntervalInSeconds = 5;
KDPC CmpDelayCloseDpc;
KTIMER CmpDelayCloseTimer;
KGUARDED_MUTEX CmpDelayDerefKCBLock;
BOOLEAN CmpDelayDerefKCBWorkItemActive;
LIST_ENTRY CmpDelayDerefKCBListHead;
ULONG CmpDelayDerefKCBIntervalInSeconds = 5;
KDPC CmpDelayDerefKCBDpc;
KTIMER CmpDelayDerefKCBTimer;
BOOLEAN CmpHoldLazyFlush;
/* FUNCTIONS *****************************************************************/
VOID
NTAPI
CmpDelayCloseDpcRoutine(IN PKDPC Dpc,
IN PVOID DeferredContext,
IN PVOID SystemArgument1,
IN PVOID SystemArgument2)
{
/* Sanity check */
ASSERT(CmpDelayCloseWorkItemActive);
/* Queue the work item */
ExQueueWorkItem(&CmpDelayCloseWorkItem, DelayedWorkQueue);
}
VOID
NTAPI
CmpDelayCloseWorker(IN PVOID Context)
{
PAGED_CODE();
/* Sanity check */
ASSERT(CmpDelayCloseWorkItemActive);
/* FIXME: TODO */
}
VOID
NTAPI
CmpInitializeCache(VOID)
{
ULONG Length;
ULONG Length, i;
/* Calculate length for the table */
Length = CmpHashTableSize * sizeof(PCM_KEY_HASH);
Length = CmpHashTableSize * sizeof(CM_KEY_HASH_TABLE_ENTRY);
/* Allocate it */
CmpCacheTable = ExAllocatePoolWithTag(PagedPool, Length, TAG_CM);
if (!CmpCacheTable) KeBugCheck(CONFIG_INITIALIZATION_FAILED);
if (!CmpCacheTable)
{
/* Take the system down */
KeBugCheckEx(CONFIG_INITIALIZATION_FAILED, 3, 1, 0, 0);
}
/* Zero out the table */
RtlZeroMemory(CmpCacheTable, Length);
/* Initialize the locks */
for (i = 0;i < CmpHashTableSize; i++)
{
/* Setup the pushlock */
ExInitializePushLock((PULONG_PTR)&CmpCacheTable[i].Lock);
}
/* Calculate length for the name cache */
Length = CmpHashTableSize * sizeof(PCM_NAME_HASH);
Length = CmpHashTableSize * sizeof(CM_NAME_HASH_TABLE_ENTRY);
/* Now allocate the name cache table */
CmpNameCacheTable = ExAllocatePoolWithTag(PagedPool, Length, TAG_CM);
if (!CmpCacheTable) KeBugCheck(CONFIG_INITIALIZATION_FAILED);
if (!CmpNameCacheTable)
{
/* Take the system down */
KeBugCheckEx(CONFIG_INITIALIZATION_FAILED, 3, 3, 0, 0);
}
/* Zero out the table */
RtlZeroMemory(CmpNameCacheTable, Length);
/* Setup the delayed close lock */
KeInitializeGuardedMutex(&CmpDelayedCloseTableLock);
/* Setup the work item */
ExInitializeWorkItem(&CmpDelayCloseWorkItem, CmpDelayCloseWorker, NULL);
/* Setup the DPC and its timer */
KeInitializeDpc(&CmpDelayCloseDpc, CmpDelayCloseDpcRoutine, NULL);
KeInitializeTimer(&CmpDelayCloseTimer);
}
VOID
NTAPI
CmpInitCmPrivateDelayAlloc(VOID)
{
/* Initialize the delay allocation list and lock */
KeInitializeGuardedMutex(&CmpDelayAllocBucketLock);
InitializeListHead(&CmpFreeDelayItemsListHead);
}
VOID
NTAPI
CmpInitCmPrivateAlloc(VOID)
{
/* Make sure we didn't already do this */
if (!CmpAllocInited)
/* Initialize the locks */
for (i = 0;i < CmpHashTableSize; i++)
{
/* Setup the lock and list */
KeInitializeGuardedMutex(&CmpAllocBucketLock);
InitializeListHead(&CmpFreeKCBListHead);
CmpAllocInited = TRUE;
/* Setup the pushlock */
ExInitializePushLock((PULONG_PTR)&CmpNameCacheTable[i].Lock);
}
/* Setup the delayed close table */
CmpInitializeDelayedCloseTable();
}
VOID
NTAPI
CmpRemoveKeyHash(IN PCM_KEY_HASH KeyHash)
{
PCM_KEY_HASH *Prev;
PCM_KEY_HASH Current;
/* Lookup all the keys in this index entry */
Prev = &GET_HASH_ENTRY(CmpCacheTable, KeyHash->ConvKey).Entry;
while (TRUE)
{
/* Save the current one and make sure it's valid */
Current = *Prev;
ASSERT(Current != NULL);
/* Check if it matches */
if (Current == KeyHash)
{
/* Then write the previous one */
*Prev = Current->NextHash;
break;
}
/* Otherwise, keep going */
Prev = &Current->NextHash;
}
}
PCM_KEY_CONTROL_BLOCK
NTAPI
CmpInsertKeyHash(IN PCM_KEY_HASH KeyHash,
IN BOOLEAN IsFake)
{
ULONG i;
PCM_KEY_HASH Entry;
/* Get the hash index */
i = GET_HASH_INDEX(KeyHash->ConvKey);
/* If this is a fake key, increase the key cell to use the parent data */
if (IsFake) KeyHash->KeyCell++;
/* Loop the hash table */
Entry = CmpCacheTable[i].Entry;
while (Entry)
{
/* Check if this matches */
if ((KeyHash->ConvKey == Entry->ConvKey) &&
(KeyHash->KeyCell == Entry->KeyCell) &&
(KeyHash->KeyHive == Entry->KeyHive))
{
/* Return it */
return CONTAINING_RECORD(Entry, CM_KEY_CONTROL_BLOCK, KeyHash);
}
/* Keep looping */
Entry = Entry->NextHash;
}
/* No entry found, add this one and return NULL since none existed */
KeyHash->NextHash = CmpCacheTable[i].Entry;
CmpCacheTable[i].Entry = KeyHash;
return NULL;
}
PCM_NAME_CONTROL_BLOCK
NTAPI
CmpGetNameControlBlock(IN PUNICODE_STRING NodeName)
{
PCM_NAME_CONTROL_BLOCK Ncb = NULL;
ULONG ConvKey = 0;
PWCHAR p, pp;
ULONG i;
BOOLEAN IsCompressed = TRUE, Found = FALSE;
PCM_NAME_HASH HashEntry;
ULONG Length, NcbSize;
/* Loop the name */
p = NodeName->Buffer;
for (i = 0; i < NodeName->Length; i += sizeof(WCHAR))
{
/* Make sure it's not a slash */
if (*p != OBJ_NAME_PATH_SEPARATOR)
{
/* Add it to the hash */
ConvKey = 37 * ConvKey + RtlUpcaseUnicodeChar(*p);
}
/* Next character */
p++;
}
/* Set assumed lengh and loop to check */
Length = NodeName->Length / sizeof(WCHAR);
for (i = 0; i < (NodeName->Length / sizeof(WCHAR)); i++)
{
/* Check if this is a valid character */
if (*NodeName->Buffer > (UCHAR)-1)
{
/* This is the actual size, and we know we're not compressed */
Length = NodeName->Length;
IsCompressed = FALSE;
}
}
/* Lock the NCB entry */
CmpAcquireNcbLockExclusiveByKey(ConvKey);
/* Get the hash entry */
HashEntry = GET_HASH_ENTRY(CmpNameCacheTable, ConvKey).Entry;
while (HashEntry)
{
/* Get the current NCB */
Ncb = CONTAINING_RECORD(HashEntry, CM_NAME_CONTROL_BLOCK, NameHash);
/* Check if the hash matches */
if ((ConvKey = HashEntry->ConvKey) && (Length = Ncb->NameLength))
{
/* Assume success */
Found = TRUE;
/* If the NCB is compressed, do a compressed name compare */
if (Ncb->Compressed)
{
/* Compare names */
if (CmpCompareCompressedName(NodeName, Ncb->Name, Length))
{
/* We failed */
Found = FALSE;
}
}
else
{
/* Do a manual compare */
p = NodeName->Buffer;
pp = Ncb->Name;
for (i = 0; i < Ncb->NameLength; i += sizeof(WCHAR))
{
/* Compare the character */
if (RtlUpcaseUnicodeChar(*p) != RtlUpcaseUnicodeChar(*pp))
{
/* Failed */
Found = FALSE;
break;
}
/* Next chars */
p++;
pp++;
}
}
/* Check if we found a name */
if (Found)
{
/* Reference it */
Ncb->RefCount++;
}
}
/* Go to the next hash */
HashEntry = HashEntry->NextHash;
}
/* Check if we didn't find it */
if (!Found)
{
/* Allocate one */
NcbSize = FIELD_OFFSET(CM_NAME_CONTROL_BLOCK, Name) + Length;
Ncb = ExAllocatePoolWithTag(PagedPool, NcbSize, TAG_CM);
if (!Ncb)
{
/* Release the lock and fail */
CmpReleaseNcbLockByKey(ConvKey);
return NULL;
}
/* Clear it out */
RtlZeroMemory(Ncb, NcbSize);
/* Check if the name was compressed */
if (IsCompressed)
{
/* Copy the compressed name */
Ncb->Compressed = TRUE;
for (i = 0; i < Length; i++)
{
/* Copy Unicode to ANSI */
((PCHAR)Ncb->Name)[i] = (CHAR)RtlUpcaseUnicodeChar(NodeName->Buffer[i]);
}
}
else
{
/* Copy the name directly */
Ncb->Compressed = FALSE;
for (i = 0; i < Length; i++)
{
/* Copy each unicode character */
Ncb->Name[i] = RtlUpcaseUnicodeChar(NodeName->Buffer[i]);
}
}
/* Setup the rest of the NCB */
Ncb->ConvKey = ConvKey;
Ncb->RefCount++;
Ncb->NameLength = Length;
/* Insert the name in the hash table */
HashEntry = &Ncb->NameHash;
HashEntry->NextHash = GET_HASH_ENTRY(CmpNameCacheTable, ConvKey).Entry;
GET_HASH_ENTRY(CmpNameCacheTable, ConvKey).Entry = HashEntry;
}
/* Release NCB lock */
CmpReleaseNcbLockByKey(ConvKey);
/* Return the NCB found */
return Ncb;
}
VOID
NTAPI
CmpRemoveKeyControlBlock(IN PCM_KEY_CONTROL_BLOCK Kcb)
{
/* Make sure that the registry and KCB are utterly locked */
ASSERT((CmpIsKcbLockedExclusive(Kcb) == TRUE) ||
(CmpTestRegistryLockExclusive() == TRUE));
/* Remove the key hash */
CmpRemoveKeyHash(&Kcb->KeyHash);
}
VOID
NTAPI
CmpDereferenceNameControlBlockWithLock(IN PCM_NAME_CONTROL_BLOCK Ncb)
{
PCM_NAME_HASH Current, *Next;
/* Lock the NCB */
CmpAcquireNcbLockExclusive(Ncb);
/* Decrease the reference count */
if (!(--Ncb->RefCount))
{
/* Find the NCB in the table */
Next = &GET_HASH_ENTRY(CmpNameCacheTable, Ncb->ConvKey).Entry;
while (TRUE)
{
/* Check the current entry */
Current = *Next;
ASSERT(Current != NULL);
if (Current == &Ncb->NameHash)
{
/* Unlink it */
*Next = Current->NextHash;
break;
}
/* Get to the next one */
Next = &Current->NextHash;
}
/* Found it, now free it */
ExFreePool(Ncb);
}
/* Release the lock */
CmpReleaseNcbLock(Ncb);
}
BOOLEAN
NTAPI
CmpReferenceKeyControlBlock(IN PCM_KEY_CONTROL_BLOCK Kcb)
{
/* Check if this is the KCB's first reference */
if (Kcb->RefCount == 0)
{
/* Check if the KCB is locked in shared mode */
if (!CmpIsKcbLockedExclusive(Kcb))
{
/* Convert it to exclusive */
if (!CmpTryToConvertKcbSharedToExclusive(Kcb))
{
/* Set the delayed close index so that we can be ignored */
Kcb->DelayedCloseIndex = 1;
/* Increase the reference count while we release the lock */
InterlockedIncrement((PLONG)&Kcb->RefCount);
/* Go from shared to exclusive */
CmpConvertKcbSharedToExclusive(Kcb);
/* Decrement the reference count; the lock is now held again */
InterlockedDecrement((PLONG)&Kcb->RefCount);
/* Check if we still control the index */
if (Kcb->DelayedCloseIndex == 1)
{
/* Reset it */
Kcb->DelayedCloseIndex = 0;
}
else
{
/* Sanity check */
ASSERT((Kcb->DelayedCloseIndex == CmpDelayedCloseSize) ||
(Kcb->DelayedCloseIndex == 0));
}
}
}
}
/* Increase the reference count */
if (InterlockedIncrement((PLONG)&Kcb->RefCount) == 0)
{
/* We've overflown to 64K references, bail out */
InterlockedDecrement((PLONG)&Kcb->RefCount);
return FALSE;
}
/* Check if this was the last close index */
if (!Kcb->DelayedCloseIndex)
{
/* Check if the KCB is locked in shared mode */
if (!CmpIsKcbLockedExclusive(Kcb))
{
/* Convert it to exclusive */
if (!CmpTryToConvertKcbSharedToExclusive(Kcb))
{
/* Go from shared to exclusive */
CmpConvertKcbSharedToExclusive(Kcb);
}
}
/* If we're still the last entry, remove us */
if (!Kcb->DelayedCloseIndex) CmpRemoveFromDelayedClose(Kcb);
}
/* Return success */
return TRUE;
}
VOID
NTAPI
CmpCleanUpKcbValueCache(IN PCM_KEY_CONTROL_BLOCK Kcb)
{
PULONG_PTR CachedList;
ULONG i;
/* Sanity check */
ASSERT((CmpIsKcbLockedExclusive(Kcb) == TRUE) ||
(CmpTestRegistryLockExclusive() == TRUE));
/* Check if the value list is cached */
if (CMP_IS_CELL_CACHED(Kcb->ValueCache.ValueList))
{
/* Get the cache list */
CachedList = (PULONG_PTR)CMP_GET_CACHED_DATA(Kcb->ValueCache.ValueList);
for (i = 0; i < Kcb->ValueCache.Count; i++)
{
/* Check if this cell is cached */
if (CMP_IS_CELL_CACHED(CachedList[i]))
{
/* Free it */
ExFreePool((PVOID)CMP_GET_CACHED_CELL(CachedList[i]));
}
}
/* Now free the list */
ExFreePool((PVOID)CMP_GET_CACHED_CELL(Kcb->ValueCache.ValueList));
Kcb->ValueCache.ValueList = HCELL_NIL;
}
else if (Kcb->ExtFlags & CM_KCB_SYM_LINK_FOUND)
{
/* This is a sym link, check if there's only one reference left */
if ((((PCM_KEY_CONTROL_BLOCK)Kcb->ValueCache.RealKcb)->RefCount == 1) &&
!(((PCM_KEY_CONTROL_BLOCK)Kcb->ValueCache.RealKcb)->Delete))
{
/* Disable delay close for the KCB */
((PCM_KEY_CONTROL_BLOCK)Kcb->ValueCache.RealKcb)->ExtFlags |= CM_KCB_NO_DELAY_CLOSE;
}
/* Dereference the KCB */
CmpDelayDerefKeyControlBlock((PCM_KEY_CONTROL_BLOCK)Kcb->ValueCache.RealKcb);
Kcb->ExtFlags &= ~CM_KCB_SYM_LINK_FOUND;
}
}
VOID
NTAPI
CmpDelayDerefKCBDpcRoutine(IN PKDPC Dpc,
IN PVOID DeferredContext,
IN PVOID SystemArgument1,
IN PVOID SystemArgument2)
{
/* Sanity check */
ASSERT(CmpDelayDerefKCBWorkItemActive);
/* Queue the work item */
ExQueueWorkItem(&CmpDelayDerefKCBWorkItem, DelayedWorkQueue);
}
VOID
NTAPI
CmpDelayDerefKCBWorker(IN PVOID Context)
CmpCleanUpKcbCacheWithLock(IN PCM_KEY_CONTROL_BLOCK Kcb,
IN BOOLEAN LockHeldExclusively)
{
PCM_KEY_CONTROL_BLOCK Parent;
PAGED_CODE();
/* Sanity check */
ASSERT(CmpDelayDerefKCBWorkItemActive);
/* Sanity checks */
ASSERT((CmpIsKcbLockedExclusive(Kcb) == TRUE) ||
(CmpTestRegistryLockExclusive() == TRUE));
ASSERT(Kcb->RefCount == 0);
/* FIXME: TODO */
ASSERT(FALSE);
/* Cleanup the value cache */
CmpCleanUpKcbValueCache(Kcb);
/* Reference the NCB */
CmpDereferenceNameControlBlockWithLock(Kcb->NameBlock);
/* Check if we have an index hint block and free it */
if (Kcb->ExtFlags & CM_KCB_SUBKEY_HINT) ExFreePool(Kcb->IndexHint);
/* Check if we were already deleted */
Parent = Kcb->ParentKcb;
if (!Kcb->Delete) CmpRemoveKeyControlBlock(Kcb);
/* Free the KCB as well */
CmpFreeKeyControlBlock(Kcb);
/* Check if we have a parent */
if (Parent)
{
/* Dereference the parent */
LockHeldExclusively ?
CmpDereferenceKeyControlBlockWithLock(Kcb,LockHeldExclusively) :
CmpDelayDerefKeyControlBlock(Kcb);
}
}
VOID
NTAPI
CmpInitDelayDerefKCBEngine(VOID)
CmpDereferenceKeyControlBlockWithLock(IN PCM_KEY_CONTROL_BLOCK Kcb,
IN BOOLEAN LockHeldExclusively)
{
/* Initialize lock and list */
KeInitializeGuardedMutex(&CmpDelayDerefKCBLock);
InitializeListHead(&CmpDelayDerefKCBListHead);
/* Sanity check */
ASSERT((CmpIsKcbLockedExclusive(Kcb) == TRUE) ||
(CmpTestRegistryLockExclusive() == TRUE));
/* Setup the work item */
ExInitializeWorkItem(&CmpDelayDerefKCBWorkItem,
CmpDelayDerefKCBWorker,
NULL);
/* Check if this is the last reference */
if (InterlockedDecrement((PLONG)&Kcb->RefCount) == 0)
{
/* Check if we should do a direct delete */
if (((CmpHoldLazyFlush) &&
!(Kcb->ExtFlags & CM_KCB_SYM_LINK_FOUND) &&
!(Kcb->Flags & KEY_SYM_LINK)) ||
(Kcb->ExtFlags & CM_KCB_NO_DELAY_CLOSE) ||
(Kcb->Delete))
{
/* Clean up the KCB*/
CmpCleanUpKcbCacheWithLock(Kcb, LockHeldExclusively);
}
else
{
/* Otherwise, use delayed close */
CmpAddToDelayedClose(Kcb, LockHeldExclusively);
}
}
}
/* Setup the DPC and timer for it */
KeInitializeDpc(&CmpDelayDerefKCBDpc, CmpDelayDerefKCBDpcRoutine, NULL);
KeInitializeTimer(&CmpDelayDerefKCBTimer);
VOID
NTAPI
InitializeKCBKeyBodyList(IN PCM_KEY_CONTROL_BLOCK Kcb)
{
/* Initialize the list */
InitializeListHead(&Kcb->KeyBodyListHead);
/* Clear the bodies */
Kcb->KeyBodyArray[0] =
Kcb->KeyBodyArray[1] =
Kcb->KeyBodyArray[2] =
Kcb->KeyBodyArray[3] = NULL;
}
PCM_KEY_CONTROL_BLOCK
@ -183,6 +554,213 @@ CmpCreateKeyControlBlock(IN PHHIVE Hive,
IN ULONG Flags,
IN PUNICODE_STRING KeyName)
{
/* Temporary hack */
return (PVOID)1;
PCM_KEY_CONTROL_BLOCK Kcb, FoundKcb = NULL;
UNICODE_STRING NodeName;
ULONG ConvKey = 0, i;
BOOLEAN IsFake, HashLock;
PWCHAR p;
/* Make sure we own this hive in case it's being unloaded */
if ((Hive->HiveFlags & HIVE_IS_UNLOADING) &&
(((PCMHIVE)Hive)->CreatorOwner != KeGetCurrentThread()))
{
/* Fail */
return NULL;
}
/* Check if this is a fake KCB */
IsFake = Flags & CMP_CREATE_FAKE_KCB ? TRUE : FALSE;
/* If we have a parent, use its ConvKey */
if (Parent) ConvKey = Parent->ConvKey;
/* Make a copy of the name */
NodeName = *KeyName;
/* Remove leading slash */
while ((NodeName.Length) && (*NodeName.Buffer == OBJ_NAME_PATH_SEPARATOR))
{
/* Move the buffer by one */
NodeName.Buffer++;
NodeName.Length -= sizeof(WCHAR);
}
/* Make sure we didn't get just a slash or something */
ASSERT(NodeName.Length > 0);
/* Now setup the hash */
p = NodeName.Buffer;
for (i = 0; i < NodeName.Length; i += sizeof(WCHAR))
{
/* Make sure it's a valid character */
if (*p != OBJ_NAME_PATH_SEPARATOR)
{
/* Add this key to the hash */
ConvKey = 37 * ConvKey + RtlUpcaseUnicodeChar(*p);
}
/* Move on */
p++;
}
/* Allocate the KCB */
Kcb = CmpAllocateKeyControlBlock();
if (!Kcb) return NULL;
/* Initailize the key list */
InitializeKCBKeyBodyList(Kcb);
/* Set it up */
Kcb->Delete = FALSE;
Kcb->RefCount = 1;
Kcb->KeyHive = Hive;
Kcb->KeyCell = Index;
Kcb->ConvKey = ConvKey;
Kcb->DelayedCloseIndex = CmpDelayedCloseSize;
Kcb->InDelayClose = 0;
/* Check if we have two hash entires */
HashLock = Flags & CMP_LOCK_HASHES_FOR_KCB ? TRUE : FALSE;
if (HashLock)
{
/* Not yet implemented */
KeBugCheck(0);
}
/* Check if we already have a KCB */
FoundKcb = CmpInsertKeyHash(&Kcb->KeyHash, IsFake);
if (FoundKcb)
{
/* Sanity check */
ASSERT(!FoundKcb->Delete);
/* Free the one we allocated and reference this one */
CmpFreeKeyControlBlock(Kcb);
Kcb = FoundKcb;
if (!CmpReferenceKeyControlBlock(Kcb))
{
/* We got too many handles */
ASSERT(Kcb->RefCount + 1 != 0);
Kcb = NULL;
}
else
{
/* Check if we're not creating a fake one, but it used to be fake */
if ((Kcb->ExtFlags & CM_KCB_KEY_NON_EXIST) && !(IsFake))
{
/* Set the hive and cell */
Kcb->KeyHive = Hive;
Kcb->KeyCell = Index;
/* This means that our current information is invalid */
Kcb->ExtFlags = CM_KCB_INVALID_CACHED_INFO;
}
/* Check if we didn't have any valid data */
if (!(Kcb->ExtFlags & (CM_KCB_NO_SUBKEY |
CM_KCB_SUBKEY_ONE |
CM_KCB_SUBKEY_HINT)))
{
/* Calculate the index hint */
Kcb->SubKeyCount = Node->SubKeyCounts[Stable] +
Node->SubKeyCounts[Volatile];
/* Cached information is now valid */
Kcb->ExtFlags &= ~CM_KCB_INVALID_CACHED_INFO;
}
/* Setup the other data */
Kcb->KcbLastWriteTime = Node->LastWriteTime;
Kcb->KcbMaxNameLen = (USHORT)Node->MaxNameLen;
Kcb->KcbMaxValueNameLen = (USHORT)Node->MaxValueNameLen;
Kcb->KcbMaxValueDataLen = Node->MaxValueDataLen;
}
}
else
{
/* No KCB, do we have a parent? */
if (Parent)
{
/* Reference the parent */
if (((Parent->TotalLevels + 1) < 512) &&
(CmpReferenceKeyControlBlock(Parent)))
{
/* Link it */
Kcb->ParentKcb = Parent;
Kcb->TotalLevels = Parent->TotalLevels + 1;
}
else
{
/* Remove the KCB and free it */
CmpRemoveKeyControlBlock(Kcb);
CmpFreeKeyControlBlock(Kcb);
Kcb = NULL;
}
}
else
{
/* No parent, this is the root node */
Kcb->ParentKcb = NULL;
Kcb->TotalLevels = 1;
}
/* Check if we have a KCB */
if (Kcb)
{
/* Get the NCB */
Kcb->NameBlock = CmpGetNameControlBlock(&NodeName);
if (Kcb->NameBlock)
{
/* Fill it out */
Kcb->ValueCache.Count = Node->ValueList.Count;
Kcb->ValueCache.ValueList = Node->ValueList.List;
Kcb->Flags = Node->Flags;
Kcb->ExtFlags = 0;
Kcb->DelayedCloseIndex = CmpDelayedCloseSize;
/* Remember if this is a fake key */
if (IsFake) Kcb->ExtFlags |= CM_KCB_KEY_NON_EXIST;
/* Setup the other data */
Kcb->SubKeyCount = Node->SubKeyCounts[Stable] +
Node->SubKeyCounts[Volatile];
Kcb->KcbLastWriteTime = Node->LastWriteTime;
Kcb->KcbMaxNameLen = (USHORT)Node->MaxNameLen;
Kcb->KcbMaxValueNameLen = (USHORT)Node->MaxValueNameLen;
Kcb->KcbMaxValueDataLen = (USHORT)Node->MaxValueDataLen;
}
else
{
/* Dereference the KCB */
CmpDereferenceKeyControlBlockWithLock(Parent, FALSE);
/* Remove the KCB and free it */
CmpRemoveKeyControlBlock(Kcb);
CmpFreeKeyControlBlock(Kcb);
Kcb = NULL;
}
}
}
/* Sanity check */
ASSERT((!Kcb) || (Kcb->Delete == FALSE));
/* Check if we had locked the hashes */
if (HashLock)
{
/* Not yet implemented: Unlock hashes */
KeBugCheck(0);
}
/* Return the KCB */
return Kcb;
}
VOID
NTAPI
EnlistKeyBodyWithKCB(IN PCM_KEY_BODY KeyBody,
IN ULONG Flags)
{
ASSERT(FALSE);
}

87
reactos/ntoskrnl/config/cmsysini.c
View file

@ -17,6 +17,12 @@ KGUARDED_MUTEX CmpSelfHealQueueLock;
LIST_ENTRY CmpSelfHealQueueListHead;
PEPROCESS CmpSystemProcess;
BOOLEAN HvShutdownComplete;
PVOID CmpRegistryLockCallerCaller, CmpRegistryLockCaller;
BOOLEAN CmpFlushStarveWriters;
BOOLEAN CmpFlushOnLockRelease;
BOOLEAN CmpSpecialBootCondition;
BOOLEAN CmpNoWrite;
BOOLEAN CmpForceForceFlush;
/* FUNCTIONS *****************************************************************/
@ -704,7 +710,7 @@ CmpCreateRegistryRoot(VOID)
/* Initialize the object */
#if 0
RootKey->Type = TAG('k', 'v', '0', '2';
RootKey->Type = TAG('k', 'v', '0', '2');
RootKey->KeyControlBlock = Kcb;
RootKey->NotifyBlock = NULL;
RootKey->ProcessID = PsGetCurrentProcessId();
@ -721,7 +727,7 @@ CmpCreateRegistryRoot(VOID)
#endif
/* Insert it into the object list head */
EnlistKeyBodyWithKCB(RootKey, 0);
EnlistKeyBodyWithKeyObject(RootKey, 0);
/* Insert the key into the namespace */
Status = ObInsertObject(RootKey,
@ -978,3 +984,80 @@ CmInitSystem1(VOID)
/* If we got here, all went well */
return TRUE;
}
VOID
NTAPI
CmpLockRegistryExclusive(VOID)
{
/* Enter a critical region and lock the registry */
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite(&CmpRegistryLock, TRUE);
/* Sanity check */
ASSERT(CmpFlushStarveWriters == 0);
RtlGetCallersAddress(&CmpRegistryLockCaller, &CmpRegistryLockCallerCaller);
}
BOOLEAN
NTAPI
CmpTestRegistryLock(VOID)
{
/* Test the lock */
return (BOOLEAN)ExIsResourceAcquiredSharedLite(&CmpRegistryLock);
}
BOOLEAN
NTAPI
CmpTestRegistryLockExclusive(VOID)
{
/* Test the lock */
return ExIsResourceAcquiredExclusiveLite(&CmpRegistryLock);
}
VOID
NTAPI
CmpUnlockRegistry(VOID)
{
/* Sanity check */
CMP_ASSERT_REGISTRY_LOCK();
/* Check if we should flush the registry */
if (CmpFlushOnLockRelease)
{
/* The registry should be exclusively locked for this */
CMP_ASSERT_EXCLUSIVE_REGISTRY_LOCK();
/* Flush the registry */
CmpFlushEntireRegistry(TRUE);
CmpFlushOnLockRelease = FALSE;
}
/* Release the lock and leave the critical region */
ExReleaseResourceLite(&CmpRegistryLock);
KeLeaveCriticalRegion();
}
BOOLEAN
NTAPI
CmpFlushEntireRegistry(IN BOOLEAN ForceFlush)
{
BOOLEAN Flushed = TRUE;
/* Make sure that the registry isn't read-only now */
if (CmpNoWrite) return TRUE;
/* Otherwise, acquire the hive list lock and disable force flush */
CmpForceForceFlush = FALSE;
ExAcquirePushLockShared(&CmpHiveListHeadLock);
/* Check if the hive list isn't empty */
if (!IsListEmpty(&CmpHiveListHead))
{
/* FIXME: TODO */
ASSERT(FALSE);
}
/* Release the lock and return the flush state */
ExReleasePushLock(&CmpHiveListHeadLock);
return Flushed;
}

2
reactos/ntoskrnl/ntoskrnl.rbuild
View file

@ -110,12 +110,14 @@
<file>cmhardwr.c</file>
</directory>
</if>
<file>cmalloc.c</file>
<file>cmapi.c</file>
<file>cmboot.c</file>
<file>cmcheck.c</file>
<file>cmcontrl.c</file>
<file>cmconfig.c</file>
<file>cmdata.c</file>
<file>cmdelay.c</file>
<file>cmindex.c</file>
<file>cminit.c</file>
<file>cmhook.c</file>