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744 lines
20 KiB
744 lines
20 KiB
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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cmdown.c
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Abstract:
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This module cleans up all the memory used by CM.
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Author:
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Dragos C. Sambotin (dragoss) 21-Feb-00
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Environment:
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This routine is intended to be called at system shutdown
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in order to detect memory leaks. It is supposed to free
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all registry data that is not freed by CmShutdownSystem.
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Revision History:
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--*/
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#include "cmp.h"
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//
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// externals
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//
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extern LIST_ENTRY CmpHiveListHead;
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extern PUCHAR CmpStashBuffer;
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extern PCM_KEY_HASH *CmpCacheTable;
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extern ULONG CmpDelayedCloseSize;
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extern CM_DELAYED_CLOSE_ENTRY *CmpDelayedCloseTable;
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extern PCM_NAME_HASH *CmpNameCacheTable;
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extern BOOLEAN HvShutdownComplete;
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extern BOOLEAN CmFirstTime;
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extern HIVE_LIST_ENTRY CmpMachineHiveList[];
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VOID
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CmpFreeAllMemory(
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VOID
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);
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VOID
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CmpDereferenceNameControlBlockWithLock(
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PCM_NAME_CONTROL_BLOCK Ncb
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);
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VOID
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CmpDumpKeyBodyList(
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IN PCM_KEY_CONTROL_BLOCK kcb,
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IN PULONG Count
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);
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#ifdef CM_SAVE_KCB_CACHE
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VOID
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CmpSaveKcbCache(
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VOID
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);
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#endif //CM_SAVE_KCB_CACHE
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE,CmpFreeAllMemory)
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#pragma alloc_text(PAGE,CmShutdownSystem)
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#ifdef CM_SAVE_KCB_CACHE
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#pragma alloc_text(PAGE,CmpSaveKcbCache)
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#endif //CM_SAVE_KCB_CACHE
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#endif
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VOID
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CmpFreeAllMemory(
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VOID
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)
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/*++
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Routine Description:
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- All hives are freed
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- KCB table is freed
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- Name hash table is freed
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- delay close table is freed - question: We need to clean/free all delayed close KCBs
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- all notifications/postblocks-aso.
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* equivalent with MmReleaseAllMemory
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Arguments:
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Return Value:
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--*/
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{
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PCMHIVE CmHive;
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LONG i;
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PCM_KEY_CONTROL_BLOCK KeyControlBlock;
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PCM_DELAYED_CLOSE_ENTRY DelayedEntry;
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PLIST_ENTRY NotifyPtr;
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PCM_NOTIFY_BLOCK NotifyBlock;
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PCM_POST_BLOCK PostBlock;
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PCM_KEY_HASH Current;
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PLIST_ENTRY AnchorAddr;
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ULONG Count;
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BOOLEAN MessageDisplayed;
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//
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// Iterate through the list of the hives in the system
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//
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while (IsListEmpty(&CmpHiveListHead) == FALSE) {
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//
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// Remove the hive from the list
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//
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CmHive = (PCMHIVE)RemoveHeadList(&CmpHiveListHead);
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CmHive = (PCMHIVE)CONTAINING_RECORD(CmHive,
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CMHIVE,
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HiveList);
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//
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// close hive handles (the ones that are open)
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//
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for (i=0; i<HFILE_TYPE_MAX; i++) {
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// these should be closed by CmShutdownSystem
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ASSERT( CmHive->FileHandles[i] == NULL );
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/*
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if (CmHive->FileHandles[i] != NULL) {
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CmCloseHandle(CmHive->FileHandles[i]);
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CmHive->FileHandles[i] = NULL;
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}
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*/ }
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//
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// free the hive lock and view lock
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//
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ASSERT( CmHive->HiveLock != NULL );
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ExFreePool(CmHive->HiveLock);
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ASSERT( CmHive->ViewLock != NULL );
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ExFreePool(CmHive->ViewLock);
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/*
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DRAGOSS: we don't want ot do that! rather, we want to detect why we still
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have notifications at this point!!!!
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//
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// free notify-related stuff
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//
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NotifyPtr = &(CmHive->NotifyList);
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NotifyPtr = NotifyPtr->Flink;
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while( NotifyPtr != NULL ) {
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NotifyBlock = CONTAINING_RECORD(NotifyPtr, CM_NOTIFY_BLOCK, HiveList);
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// free post blocks; we assume that all threads have been terminated at this point
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while (IsListEmpty(&(NotifyBlock->PostList)) == FALSE) {
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PostBlock = (PCM_POST_BLOCK)RemoveHeadList(&(NotifyBlock->PostList));
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PostBlock = CONTAINING_RECORD(PostBlock,
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CM_POST_BLOCK,
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NotifyList);
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if( PostBlock->PostKeyBody ) {
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ExFreePool(PostBlock->PostKeyBody);
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}
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if( IsMasterPostBlock(PostBlock) ) {
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//
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// this members are allocated only for master post blocks
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//
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switch (PostBlockType(PostBlock)) {
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case PostSynchronous:
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ExFreePool(PostBlock->u->Sync.SystemEvent);
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break;
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case PostAsyncUser:
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ExFreePool(PostBlock->u->AsyncUser.Apc);
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break;
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case PostAsyncKernel:
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break;
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}
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ExFreePool(PostBlock->u);
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}
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ExFreePool(PostBlock);
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}
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NotifyPtr = NotifyPtr->Flink;
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ExFreePool(NotifyBlock);
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}
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*/
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//
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// Spew in the debugger the names of the keynodes having notifies still set
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//
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NotifyPtr = &(CmHive->NotifyList);
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NotifyPtr = NotifyPtr->Flink;
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MessageDisplayed = FALSE;
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while( NotifyPtr != NULL ) {
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NotifyBlock = CONTAINING_RECORD(NotifyPtr, CM_NOTIFY_BLOCK, HiveList);
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AnchorAddr = &(NotifyBlock->PostList);
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PostBlock = (PCM_POST_BLOCK)(NotifyBlock->PostList.Flink);
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//
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// walk through the list and spew the keynames and postblock types.
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//
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while ( PostBlock != (PCM_POST_BLOCK)AnchorAddr ) {
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PostBlock = CONTAINING_RECORD(PostBlock,
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CM_POST_BLOCK,
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NotifyList);
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if( PostBlock->PostKeyBody ) {
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if( MessageDisplayed == FALSE ){
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MessageDisplayed = TRUE;
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DbgPrintEx(DPFLTR_CONFIG_ID,DPFLTR_ERROR_LEVEL,"Dumping untriggered notifications for hive (%lx) (%.*S) \n\n",CmHive,
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HBASE_NAME_ALLOC / sizeof(WCHAR),CmHive->Hive.BaseBlock->FileName);
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}
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switch (PostBlockType(PostBlock)) {
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case PostSynchronous:
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DbgPrintEx(DPFLTR_CONFIG_ID,DPFLTR_ERROR_LEVEL,"Synchronous ");
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break;
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case PostAsyncUser:
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DbgPrintEx(DPFLTR_CONFIG_ID,DPFLTR_ERROR_LEVEL,"AsyncUser ");
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break;
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case PostAsyncKernel:
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DbgPrintEx(DPFLTR_CONFIG_ID,DPFLTR_ERROR_LEVEL,"AsyncKernel ");
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break;
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}
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DbgPrintEx(DPFLTR_CONFIG_ID,DPFLTR_ERROR_LEVEL,"Notification, PostBlock %p not triggered on KCB %p\n",PostBlock,
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PostBlock->PostKeyBody->KeyBody->KeyControlBlock);
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}
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//
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// skip to the next element
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//
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PostBlock = (PCM_POST_BLOCK)(PostBlock->NotifyList.Flink);
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}
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NotifyPtr = NotifyPtr->Flink;
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}
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//
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// free security cache
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//
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CmpDestroySecurityCache (CmHive);
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//
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// free the hv level structure
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//
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HvFreeHive(&(CmHive->Hive));
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//
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// free the cm level structure
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//
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CmpFree(CmHive, sizeof(CMHIVE));
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}
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//
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// Now free the CM globals
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//
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// the stash buffer
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if( CmpStashBuffer != NULL ) {
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ExFreePool( CmpStashBuffer );
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}
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//
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// first, take care of all delayed closed KCBs
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// free their memory and dereference all the related.
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// name, hint, KeyHash
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//
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for (i=0; i<(LONG)CmpDelayedCloseSize; i++) {
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DelayedEntry = &(CmpDelayedCloseTable[i]);
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if( DelayedEntry->KeyControlBlock == NULL ) {
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//
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// this is a free entry
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//
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continue;
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}
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KeyControlBlock = DelayedEntry->KeyControlBlock;
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ASSERT( KeyControlBlock->DelayedCloseIndex == i );
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ASSERT( KeyControlBlock->RefCount == 0 );
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//
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// this will take care of other stuff kcb is pointing on.
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//
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CmpCleanUpKcbCacheWithLock(KeyControlBlock);
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}
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//
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// Spew open handles and associated processes
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//
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Count = 0;
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MessageDisplayed = FALSE;
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for (i=0; i<(LONG)CmpHashTableSize; i++) {
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Current = CmpCacheTable[i];
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while (Current) {
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KeyControlBlock = CONTAINING_RECORD(Current, CM_KEY_CONTROL_BLOCK, KeyHash);
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if( MessageDisplayed == FALSE ){
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MessageDisplayed = TRUE;
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DbgPrintEx(DPFLTR_CONFIG_ID,DPFLTR_ERROR_LEVEL,"\nDumping open handles : \n\n");
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}
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CmpDumpKeyBodyList(KeyControlBlock,&Count);
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Current = Current->NextHash;
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}
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}
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if( Count != 0 ) {
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//
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// there some open handles; bugcheck
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//
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CM_BUGCHECK( REGISTRY_ERROR,HANDLES_STILL_OPEN_AT_SHUTDOWN,1,Count,0);
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}
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//
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// in case of private alloc, free pages
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//
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CmpDestroyCmPrivateAlloc();
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//
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// For the 3 tables below, the objects actually pointed from inside
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// should be cleaned up (freed) at the last handle closure time
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// the related handles are closed
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//
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// KCB cache table
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ASSERT( CmpCacheTable != NULL );
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ExFreePool(CmpCacheTable);
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// NameCacheTable
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ASSERT( CmpNameCacheTable != NULL );
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ExFreePool( CmpNameCacheTable );
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// DelayedCloseTable
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ASSERT( CmpDelayedCloseTable != NULL );
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ExFreePool( CmpDelayedCloseTable );
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}
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#ifdef CMP_STATS
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VOID CmpKcbStatDpcRoutine(IN PKDPC Dpc,IN PVOID DeferredContext,IN PVOID SystemArgument1,IN PVOID SystemArgument2);
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#endif
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#ifdef CM_SAVE_KCB_CACHE
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#define CACHE_DMP_FILE_NAME L"Cache.dmp"
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VOID
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CmpSaveKcbCache(
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VOID
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)
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/*++
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Routine Description:
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Saves the content of the kcb cache to \system32\config\cache.dmp
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Format of the file:
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[ULONG] NumberOfKeys
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[ULONG] Length
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[WCHAR*Length] Path
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[ULONG] Length
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[WCHAR*Length] Path
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[ULONG] Length
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[WCHAR*Length] Path
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[ULONG] Length
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[WCHAR*Length] Path
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[.................]
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Arguments:
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NONE
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Return Value:
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NONE
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--*/
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{
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UCHAR FileBuffer[MAX_NAME];
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UNICODE_STRING FileName;
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UNICODE_STRING TempName;
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HANDLE FileHandle;
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NTSTATUS Status;
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OBJECT_ATTRIBUTES ObjectAttributes;
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IO_STATUS_BLOCK IoStatus;
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ULONG KcbNo = 0;
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LARGE_INTEGER Offset;
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ULONG FileOffset;
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ULONG i;
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PCM_KEY_CONTROL_BLOCK KeyControlBlock;
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PCM_KEY_HASH Current;
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PUNICODE_STRING Name;
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ULONG Tmp;
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PCM_DELAYED_CLOSE_ENTRY DelayedEntry;
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PAGED_CODE();
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//
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// first, open the file.
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//
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FileName.MaximumLength = MAX_NAME;
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FileName.Length = 0;
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FileName.Buffer = (PWSTR)&(FileBuffer[0]);
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RtlInitUnicodeString(
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&TempName,
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INIT_SYSTEMROOT_HIVEPATH
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);
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RtlAppendStringToString((PSTRING)&FileName, (PSTRING)&TempName);
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RtlInitUnicodeString(
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&TempName,
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CACHE_DMP_FILE_NAME
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);
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RtlAppendStringToString((PSTRING)&FileName, (PSTRING)&TempName);
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InitializeObjectAttributes(
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&ObjectAttributes,
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&FileName,
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OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
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NULL,
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NULL
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);
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ASSERT_PASSIVE_LEVEL();
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Status = ZwCreateFile(
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&FileHandle,
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FILE_READ_DATA | FILE_WRITE_DATA,
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&ObjectAttributes,
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&IoStatus,
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NULL, // alloc size = none
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FILE_ATTRIBUTE_NORMAL,
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0, // share nothing
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FILE_OPEN_IF,
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FILE_RANDOM_ACCESS,
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NULL, // eabuffer
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0 // ealength
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);
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if( !NT_SUCCESS(Status) ) {
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// bad luck
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return;
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}
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//
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// write the number of kcbs (we'll rewrite it at the end).
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//
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Offset.LowPart = FileOffset = 0;
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Offset.HighPart = 0L;
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Status = ZwWriteFile(FileHandle,
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NULL,
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NULL,
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NULL,
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&IoStatus,
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&KcbNo,
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sizeof(ULONG),
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&Offset,
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NULL);
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if( !NT_SUCCESS(Status) ) {
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goto Exit;
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}
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FileOffset = Offset.LowPart + sizeof(ULONG);
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//
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// iterate through the cache and dump all kcbs
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//
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for (i=0; i<CmpHashTableSize; i++) {
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Current = CmpCacheTable[i];
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while (Current) {
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KeyControlBlock = CONTAINING_RECORD(Current, CM_KEY_CONTROL_BLOCK, KeyHash);
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Name = CmpConstructName(KeyControlBlock);
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if( Name ){
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Tmp = (ULONG)Name->Length;
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//
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// write off the length
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//
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Offset.LowPart = FileOffset;
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Status = ZwWriteFile(FileHandle,
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NULL,
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NULL,
|
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NULL,
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&IoStatus,
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&Tmp,
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sizeof(ULONG),
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&Offset,
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NULL);
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if( !NT_SUCCESS(Status) ) {
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goto Exit;
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}
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FileOffset = Offset.LowPart + sizeof(ULONG);
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//
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// and the buffer
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//
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Offset.LowPart = FileOffset;
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Status = ZwWriteFile(FileHandle,
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NULL,
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NULL,
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NULL,
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&IoStatus,
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Name->Buffer,
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Tmp,
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&Offset,
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NULL);
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if( !NT_SUCCESS(Status) ) {
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goto Exit;
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}
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FileOffset = Offset.LowPart + Tmp;
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//
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// record a new kcb and free the name
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//
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KcbNo++;
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ExFreePoolWithTag(Name, CM_NAME_TAG | PROTECTED_POOL);
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}
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Current = Current->NextHash;
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}
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}
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//
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// then, take care of all delayed closed KCBs
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//
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for (i=0; i<CmpDelayedCloseSize; i++) {
|
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DelayedEntry = &(CmpDelayedCloseTable[i]);
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if( DelayedEntry->KeyControlBlock == NULL ) {
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//
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// this is a free entry
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//
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continue;
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}
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KeyControlBlock = DelayedEntry->KeyControlBlock;
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ASSERT( KeyControlBlock->DelayedCloseIndex == i );
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ASSERT( KeyControlBlock->RefCount == 0 );
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|
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Name = CmpConstructName(KeyControlBlock);
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if( Name ){
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Tmp = (ULONG)Name->Length;
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|
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//
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// write off the length
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//
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Offset.LowPart = FileOffset;
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Status = ZwWriteFile(FileHandle,
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NULL,
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NULL,
|
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NULL,
|
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&IoStatus,
|
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&Tmp,
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sizeof(ULONG),
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&Offset,
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NULL);
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if( !NT_SUCCESS(Status) ) {
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goto Exit;
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}
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FileOffset = Offset.LowPart + sizeof(ULONG);
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|
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//
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// and the buffer
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//
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Offset.LowPart = FileOffset;
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Status = ZwWriteFile(FileHandle,
|
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NULL,
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NULL,
|
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NULL,
|
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&IoStatus,
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Name->Buffer,
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Tmp,
|
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&Offset,
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NULL);
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if( !NT_SUCCESS(Status) ) {
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goto Exit;
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}
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FileOffset = Offset.LowPart + Tmp;
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//
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// record a new kcb and free the name
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//
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KcbNo++;
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ExFreePoolWithTag(Name, CM_NAME_TAG | PROTECTED_POOL);
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}
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}
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|
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//
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// write the number of kcbs
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//
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Offset.LowPart = 0;
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Status = ZwWriteFile(FileHandle,
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|
NULL,
|
|
NULL,
|
|
NULL,
|
|
&IoStatus,
|
|
&KcbNo,
|
|
sizeof(ULONG),
|
|
&Offset,
|
|
NULL);
|
|
if( !NT_SUCCESS(Status) ) {
|
|
goto Exit;
|
|
}
|
|
|
|
ZwFlushBuffersFile(
|
|
FileHandle,
|
|
&IoStatus
|
|
);
|
|
|
|
Exit:
|
|
|
|
CmCloseHandle(FileHandle);
|
|
}
|
|
|
|
#endif //CM_SAVE_KCB_CACHE
|
|
|
|
|
|
VOID
|
|
CmShutdownSystem(
|
|
VOID
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Shuts down the registry.
|
|
|
|
Arguments:
|
|
|
|
NONE
|
|
|
|
Return Value:
|
|
|
|
NONE
|
|
|
|
--*/
|
|
{
|
|
|
|
PLIST_ENTRY p;
|
|
PCMHIVE CmHive;
|
|
NTSTATUS Status;
|
|
PVOID RegistryRoot;
|
|
|
|
PAGED_CODE();
|
|
|
|
if (CmpRegistryRootHandle) {
|
|
Status = ObReferenceObjectByHandle(CmpRegistryRootHandle,
|
|
KEY_READ,
|
|
NULL,
|
|
KernelMode,
|
|
&RegistryRoot,
|
|
NULL);
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
// We want to dereference the object twice -- once for the
|
|
// reference we just made, and once for the reference
|
|
// fromCmpCreateRegistryRoot.
|
|
ObDereferenceObject(RegistryRoot);
|
|
ObDereferenceObject(RegistryRoot);
|
|
}
|
|
|
|
ObCloseHandle(CmpRegistryRootHandle, KernelMode);
|
|
}
|
|
|
|
CmpLockRegistryExclusive();
|
|
|
|
//
|
|
// Stop the workers; only if registry has been inited
|
|
//
|
|
if( CmFirstTime == FALSE ) {
|
|
CmpShutdownWorkers();
|
|
}
|
|
|
|
//
|
|
// shut down the registry
|
|
//
|
|
CmpDoFlushAll(TRUE);
|
|
|
|
//
|
|
// try to compress the system hive
|
|
//
|
|
CmCompressKey( &(CmpMachineHiveList[SYSTEM_HIVE_INDEX].CmHive->Hive) );
|
|
|
|
#ifdef CM_SAVE_KCB_CACHE
|
|
//
|
|
// dump the cache for perf warm-up at next boot
|
|
//
|
|
CmpSaveKcbCache();
|
|
#endif //CM_SAVE_KCB_CACHE
|
|
|
|
//
|
|
// close all the hive files
|
|
//
|
|
p = CmpHiveListHead.Flink;
|
|
while(p != &CmpHiveListHead) {
|
|
CmHive = CONTAINING_RECORD(p, CMHIVE, HiveList);
|
|
//
|
|
// we need to unmap all views mapped for this hive first
|
|
//
|
|
CmpDestroyHiveViewList(CmHive);
|
|
//
|
|
// dereference the fileobject (if any).
|
|
//
|
|
CmpDropFileObjectForHive(CmHive);
|
|
|
|
//
|
|
// now we can safely close all the handles
|
|
//
|
|
CmpCmdHiveClose(CmHive);
|
|
|
|
p=p->Flink;
|
|
}
|
|
|
|
#ifdef CMP_STATS
|
|
// last chance to dump statistics
|
|
if( CmFirstTime == FALSE ) {
|
|
CmpKcbStatDpcRoutine(NULL,NULL,NULL,NULL);
|
|
}
|
|
#endif
|
|
|
|
HvShutdownComplete = TRUE; // Tell HvSyncHive to ignore all
|
|
// further requests
|
|
|
|
if((PoCleanShutdownEnabled() & PO_CLEAN_SHUTDOWN_REGISTRY) && (CmFirstTime == FALSE)){
|
|
//
|
|
// Free aux memory used internally by CM
|
|
//
|
|
CmpFreeAllMemory();
|
|
}
|
|
|
|
CmpUnlockRegistry();
|
|
return;
|
|
}
|