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418 lines
11 KiB
418 lines
11 KiB
/**********************************************************************/
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/** Microsoft Windows NT **/
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/** Copyright(c) Microsoft Corp., 1993 **/
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/**********************************************************************/
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/*
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infoperf.c
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This file implements the Extensible Performance Objects for
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the common INFO counters
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FILE HISTORY:
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KeithMo 07-Jun-1993 Created, based on RussBl's sample code.
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MuraliK 02-Jun-1995 Added Counters for Atq I/O requests
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SophiaC 16-Oct-1995 Info/Access Product Split
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MuraliK 16-Nov-1995 Removed undoc apis
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*/
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#include <windows.h>
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#include <winperf.h>
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#include <lm.h>
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#include <inetinfo.h>
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#include <string.h>
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#include <stdlib.h>
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#include <infoctrs.h>
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#include <perfmsg.h>
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#include <perfutil.h>
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#include <infodata.h>
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# include "apiutil.h"
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//
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// Private constants.
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//
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//
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// Private globals.
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//
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DWORD cOpens = 0; // Active "opens" reference count.
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BOOL fInitOK = FALSE; // TRUE if DLL initialized OK.
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#if DBG
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DWORD INFODebug = 0; // Debug behaviour flags.
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#endif // DBG
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//
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// Public prototypes.
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//
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PM_OPEN_PROC OpenINFOPerformanceData;
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PM_COLLECT_PROC CollectINFOPerformanceData;
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PM_CLOSE_PROC CloseINFOPerformanceData;
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//
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// Public functions.
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//
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/*******************************************************************
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NAME: OpenINFOPerformanceData
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SYNOPSIS: Initializes the data structures used to communicate
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performance counters with the registry.
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ENTRY: lpDeviceNames - Poitner to object ID of each device
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to be opened.
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RETURNS: DWORD - Win32 status code.
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HISTORY:
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KeithMo 07-Jun-1993 Created.
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********************************************************************/
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DWORD OpenINFOPerformanceData( LPWSTR lpDeviceNames )
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{
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DWORD err = NO_ERROR;
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HKEY hkey = NULL;
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DWORD size;
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DWORD type;
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DWORD dwFirstCounter;
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DWORD dwFirstHelp;
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PERF_COUNTER_DEFINITION * pctr;
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DWORD i;
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//
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// Since SCREG is multi-threaded and will call this routine in
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// order to service remote performance queries, this library
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// must keep track of how many times it has been opened (i.e.
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// how many threads have accessed it). The registry routines will
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// limit access to the initialization routine to only one thread
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// at a time so synchronization (i.e. reentrancy) should not be
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// a problem.
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//
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if( !fInitOK )
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{
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//
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// This is the *first* open.
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//
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//
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// Open the HTTP Server service's Performance key.
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//
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err = RegOpenKeyEx( HKEY_LOCAL_MACHINE,
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INFO_PERFORMANCE_KEY,
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0,
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KEY_ALL_ACCESS,
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&hkey );
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if( err == NO_ERROR )
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{
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//
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// Read the first counter DWORD.
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//
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size = sizeof(DWORD);
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err = RegQueryValueEx( hkey,
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"First Counter",
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NULL,
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&type,
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(LPBYTE)&dwFirstCounter,
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&size );
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}
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if( err == NO_ERROR )
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{
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//
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// Read the first help DWORD.
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//
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size = sizeof(DWORD);
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err = RegQueryValueEx( hkey,
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"First Help",
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NULL,
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&type,
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(LPBYTE)&dwFirstHelp,
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&size );
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}
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if ( err == NO_ERROR )
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{
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//
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// Update the object & counter name & help indicies.
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//
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INFODataDefinition.INFOObjectType.ObjectNameTitleIndex
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+= dwFirstCounter;
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INFODataDefinition.INFOObjectType.ObjectHelpTitleIndex
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+= dwFirstHelp;
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pctr = &INFODataDefinition.INFOBytesTotal;
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for( i = 0 ; i < NUMBER_OF_INFO_COUNTERS ; i++ )
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{
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pctr->CounterNameTitleIndex += dwFirstCounter;
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pctr->CounterHelpTitleIndex += dwFirstHelp;
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pctr++;
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}
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//
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// Remember that we initialized OK.
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//
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fInitOK = TRUE;
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}
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//
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// Close the registry if we managed to actually open it.
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//
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if( hkey != NULL )
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{
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RegCloseKey( hkey );
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hkey = NULL;
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}
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}
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//
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// Bump open counter.
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//
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cOpens++;
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return NO_ERROR;
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} // OpenINFOPerformanceData
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/*******************************************************************
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NAME: CollectINFOPerformanceData
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SYNOPSIS: Initializes the data structures used to communicate
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ENTRY: lpValueName - The name of the value to retrieve.
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lppData - On entry contains a pointer to the buffer to
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receive the completed PerfDataBlock & subordinate
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structures. On exit, points to the first bytes
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*after* the data structures added by this routine.
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lpcbTotalBytes - On entry contains a pointer to the
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size (in BYTEs) of the buffer referenced by lppData.
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On exit, contains the number of BYTEs added by this
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routine.
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lpNumObjectTypes - Receives the number of objects added
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by this routine.
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RETURNS: DWORD - Win32 status code. MUST be either NO_ERROR
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or ERROR_MORE_DATA.
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HISTORY:
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KeithMo 07-Jun-1993 Created.
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********************************************************************/
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DWORD CollectINFOPerformanceData( LPWSTR lpValueName,
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LPVOID * lppData,
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LPDWORD lpcbTotalBytes,
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LPDWORD lpNumObjectTypes )
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{
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DWORD dwQueryType;
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ULONG cbRequired;
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DWORD * pdwCounter;
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INFO_COUNTER_BLOCK * pCounterBlock;
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INFO_DATA_DEFINITION * pINFODataDefinition;
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INET_INFO_STATISTICS_0 * pINFOStats;
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NET_API_STATUS neterr;
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//
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// No need to even try if we failed to open...
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//
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if( !fInitOK )
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{
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*lpcbTotalBytes = 0;
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*lpNumObjectTypes = 0;
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//
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// According to the Performance Counter design, this
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// is a successful exit. Go figure.
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//
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return NO_ERROR;
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}
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//
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// Determine the query type.
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//
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dwQueryType = GetQueryType( lpValueName );
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if( dwQueryType == QUERY_FOREIGN )
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{
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//
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// We don't do foreign queries.
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//
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*lpcbTotalBytes = 0;
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*lpNumObjectTypes = 0;
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return NO_ERROR;
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}
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if( dwQueryType == QUERY_ITEMS )
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{
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//
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// The registry is asking for a specific object. Let's
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// see if we're one of the chosen.
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//
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if( !IsNumberInUnicodeList(
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INFODataDefinition.INFOObjectType.ObjectNameTitleIndex,
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lpValueName ) )
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{
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*lpcbTotalBytes = 0;
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*lpNumObjectTypes = 0;
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return NO_ERROR;
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}
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}
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//
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// See if there's enough space.
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//
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pINFODataDefinition = (INFO_DATA_DEFINITION *)*lppData;
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cbRequired = sizeof(INFO_DATA_DEFINITION) + SIZE_OF_INFO_PERFORMANCE_DATA;
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if( *lpcbTotalBytes < cbRequired )
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{
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//
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// Nope.
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//
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*lpcbTotalBytes = 0;
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*lpNumObjectTypes = 0;
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return ERROR_MORE_DATA;
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}
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//
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// Copy the (constant, initialized) Object Type and counter definitions
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// to the caller's data buffer
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//
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memmove( pINFODataDefinition,
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&INFODataDefinition,
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sizeof(INFO_DATA_DEFINITION) );
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//
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// Try to retrieve the data.
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//
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neterr = InetInfoQueryStatistics( NULL,
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0,
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0,
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(LPBYTE *)&pINFOStats );
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if( neterr != NERR_Success )
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{
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//
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// Error retrieving statistics.
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//
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*lpcbTotalBytes = 0;
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*lpNumObjectTypes = 0;
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return NO_ERROR;
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}
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//
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// Format the INFO Server data.
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//
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pCounterBlock = (INFO_COUNTER_BLOCK *)( pINFODataDefinition + 1 );
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pCounterBlock->PerfCounterBlock.ByteLength = SIZE_OF_INFO_PERFORMANCE_DATA;
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//
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// Now move the DWORDs into the buffer.
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//
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pdwCounter = (DWORD *)(pCounterBlock + 1);
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*pdwCounter++ = pINFOStats->CacheCtrs.CacheBytesTotal;
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*pdwCounter++ = pINFOStats->CacheCtrs.CacheBytesInUse;
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*pdwCounter++ = pINFOStats->CacheCtrs.CurrentOpenFileHandles;
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*pdwCounter++ = pINFOStats->CacheCtrs.CurrentDirLists;
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*pdwCounter++ = pINFOStats->CacheCtrs.CurrentObjects;
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*pdwCounter++ = pINFOStats->CacheCtrs.FlushesFromDirChanges;
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*pdwCounter++ = pINFOStats->CacheCtrs.CacheHits;
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*pdwCounter++ = pINFOStats->CacheCtrs.CacheMisses;
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*pdwCounter++ = pINFOStats->CacheCtrs.CacheHits;
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*pdwCounter++ = ( pINFOStats->CacheCtrs.CacheMisses +
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pINFOStats->CacheCtrs.CacheHits);
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*pdwCounter++ = pINFOStats->AtqCtrs.TotalAllowedRequests;
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*pdwCounter++ = pINFOStats->AtqCtrs.TotalBlockedRequests;
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*pdwCounter++ = pINFOStats->AtqCtrs.TotalRejectedRequests;
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*pdwCounter++ = pINFOStats->AtqCtrs.CurrentBlockedRequests;
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*pdwCounter++ = pINFOStats->AtqCtrs.MeasuredBandwidth;
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//
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// Update arguments for return.
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//
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*lppData = (PVOID)pdwCounter;
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*lpNumObjectTypes = 1;
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*lpcbTotalBytes = (BYTE *)pdwCounter - (BYTE *)pINFODataDefinition;
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//
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// Free the API buffer.
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//
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MIDL_user_free( (LPBYTE)pINFOStats );
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//
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// Success! Honest!!
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//
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return NO_ERROR;
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} // CollectINFOPerformanceData
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/*******************************************************************
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NAME: CloseINFOPerformanceData
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SYNOPSIS: Terminates the performance counters.
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RETURNS: DWORD - Win32 status code.
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HISTORY:
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KeithMo 07-Jun-1993 Created.
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********************************************************************/
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DWORD CloseINFOPerformanceData( VOID )
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{
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//
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// No real cleanup to do here.
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//
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cOpens--;
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return NO_ERROR;
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} // CloseINFOPerformanceData
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