506 lines
19 KiB
C
506 lines
19 KiB
C
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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logidisk.c
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Abstract:
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This file implements a Performance Object that presents
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Logical Disk Performance object data
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Created:
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Bob Watson 22-Oct-1996
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Revision History
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--*/
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//
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// Include Files
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//
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#pragma warning ( disable : 4201 )
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#include <ntdddisk.h>
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#include <windows.h>
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#include <ole2.h>
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#include <wmium.h>
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#pragma warning ( default : 4201 )
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#include <assert.h>
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#include <winperf.h>
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#include <ntprfctr.h>
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#include <perfutil.h>
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#include "perfdisk.h"
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#include "diskmsg.h"
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#include "datalogi.h"
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DWORD APIENTRY
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CollectLDiskObjectData(
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IN OUT LPVOID *lppData,
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IN OUT LPDWORD lpcbTotalBytes,
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IN OUT LPDWORD lpNumObjectTypes
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)
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/*++
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Routine Description:
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This routine will return the data for the logical disk object
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Arguments:
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IN OUT LPVOID *lppData
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IN: pointer to the address of the buffer to receive the completed
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PerfDataBlock and subordinate structures. This routine will
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append its data to the buffer starting at the point referenced
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by *lppData.
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OUT: points to the first byte after the data structure added by this
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routine. This routine updated the value at lppdata after appending
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its data.
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IN OUT LPDWORD lpcbTotalBytes
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IN: the address of the DWORD that tells the size in bytes of the
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buffer referenced by the lppData argument
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OUT: the number of bytes added by this routine is writted to the
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DWORD pointed to by this argument
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IN OUT LPDWORD NumObjectTypes
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IN: the address of the DWORD to receive the number of objects added
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by this routine
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OUT: the number of objects added by this routine is writted to the
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DWORD pointed to by this argument
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Returns:
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0 if successful, else Win 32 error code of failure
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--*/
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{
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PLDISK_DATA_DEFINITION pLogicalDiskDataDefinition;
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DWORD TotalLen; // Length of the total return block
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LDISK_COUNTER_DATA lcdTotal;
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DWORD dwStatus = ERROR_SUCCESS;
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PPERF_INSTANCE_DEFINITION pPerfInstanceDefinition;
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PWNODE_ALL_DATA WmiDiskInfo;
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DISK_PERFORMANCE *pDiskPerformance; // Disk driver returns counters here
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PWCHAR wszInstanceName;
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DWORD dwInstanceNameOffset;
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DWORD dwNumLogicalDisks;
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WCHAR wszTempName[MAX_PATH];
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WORD wNameLength;
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WCHAR wszDriveName[MAX_PATH];
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DWORD dwDriveNameSize;
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PLDISK_COUNTER_DATA pLCD;
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BOOL bMoreEntries;
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DWORD dwReturn = ERROR_SUCCESS;
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LONGLONG llTemp;
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DWORD dwTemp;
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PDRIVE_VOLUME_ENTRY pVolume;
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LONGLONG TotalBytes;
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LONGLONG FreeBytes;
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DWORD dwCurrentWmiObjCount = 0;
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DWORD dwRemapCount = 10;
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DOUBLE dReadTime, dWriteTime, dTransferTime;
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//
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// Check for sufficient space for Logical Disk object
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// type definition
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//
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do {
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dwNumLogicalDisks = 0;
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// make sure the drive letter map is up-to-date
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if (bRemapDriveLetters) {
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dwStatus = MapDriveLetters();
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// MapDriveLetters clears the remap flag when successful
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if (dwStatus != ERROR_SUCCESS) {
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*lpcbTotalBytes = (DWORD) 0;
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*lpNumObjectTypes = (DWORD) 0;
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return dwStatus;
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}
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}
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pLogicalDiskDataDefinition = (LDISK_DATA_DEFINITION *) *lppData;
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// clear the accumulator structure
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memset (&lcdTotal, 0, sizeof(lcdTotal));
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//
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// Define Logical Disk data block
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//
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TotalLen = sizeof (LDISK_DATA_DEFINITION);
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if ( *lpcbTotalBytes < TotalLen ) {
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*lpcbTotalBytes = (DWORD) 0;
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*lpNumObjectTypes = (DWORD) 0;
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return ERROR_MORE_DATA;
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}
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memmove(pLogicalDiskDataDefinition,
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&LogicalDiskDataDefinition,
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sizeof(LDISK_DATA_DEFINITION));
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pPerfInstanceDefinition = (PERF_INSTANCE_DEFINITION *)
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&pLogicalDiskDataDefinition[1];
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WmiDiskInfo = (PWNODE_ALL_DATA)WmiBuffer;
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// make sure the structure is valid
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if (WmiDiskInfo->WnodeHeader.BufferSize < sizeof(WNODE_ALL_DATA)) {
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bMoreEntries = FALSE;
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// just to make sure someone notices on a checked build
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assert (WmiDiskInfo->WnodeHeader.BufferSize >= sizeof(WNODE_ALL_DATA));
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} else {
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// make sure there are some entries to return
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bMoreEntries =
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(WmiDiskInfo->InstanceCount > 0) ? TRUE : FALSE;
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}
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while (bMoreEntries) {
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ULONG64 StorageManagerName[2];
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pDiskPerformance = (PDISK_PERFORMANCE)(
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(PUCHAR)WmiDiskInfo + WmiDiskInfo->DataBlockOffset);
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dwInstanceNameOffset = (sizeof(DISK_PERFORMANCE)+1) & ~1;
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wNameLength = *(WORD *)((LPBYTE)pDiskPerformance +
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dwInstanceNameOffset);
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if (wNameLength > 0) {
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wszInstanceName = (LPWSTR)((LPBYTE)pDiskPerformance +
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dwInstanceNameOffset + sizeof(WORD));
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// copy to local buffer for processing
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if (wNameLength >= MAX_PATH)
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wNameLength = MAX_PATH-1; // truncate if necessary
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// copy text
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memcpy (wszTempName, wszInstanceName, wNameLength);
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// then null terminate
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wNameLength /= 2;
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wszTempName[wNameLength] = 0;
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memcpy(&StorageManagerName[0],
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&pDiskPerformance->StorageManagerName[0],
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2*sizeof(ULONG64));
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DebugPrint((4,
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"PERFDISK: Logical Disk Instance: %ws\n", wszTempName));
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// see if this is a Physical Drive
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if (!IsPhysicalDrive(pDiskPerformance)) {
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// it's not so get the name of it for this instance
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dwDriveNameSize = sizeof (wszDriveName)
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/ sizeof(wszDriveName[0]);
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dwStatus = GetDriveNameString (
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wszTempName,
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(DWORD)wNameLength,
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pVolumeList,
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dwNumVolumeListEntries,
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wszDriveName,
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&dwDriveNameSize,
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(LPCWSTR) &StorageManagerName[0],
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pDiskPerformance->StorageDeviceNumber,
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&pVolume);
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if (dwStatus != ERROR_SUCCESS) {
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// just so we have a name
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lstrcpyW (wszDriveName, wszTempName);
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dwDriveNameSize = lstrlenW(wszDriveName);
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}
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DebugPrint((4, "\t loaded as %ws\n", wszDriveName));
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TotalLen =
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// space already used
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(DWORD)((PCHAR) pPerfInstanceDefinition -
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(PCHAR) pLogicalDiskDataDefinition)
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// + estimate of this instance
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+ sizeof(PERF_INSTANCE_DEFINITION)
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+ (dwDriveNameSize + 1) * sizeof(WCHAR) ;
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TotalLen = QWORD_MULTIPLE (TotalLen);
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TotalLen += sizeof(LDISK_COUNTER_DATA);
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TotalLen = QWORD_MULTIPLE (TotalLen);
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if ( *lpcbTotalBytes < TotalLen ) {
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*lpcbTotalBytes = (DWORD) 0;
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*lpNumObjectTypes = (DWORD) 0;
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dwReturn = ERROR_MORE_DATA;
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break;
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}
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MonBuildInstanceDefinition(
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pPerfInstanceDefinition,
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(PVOID *) &pLCD,
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0, 0, // no parent
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(DWORD)-1,// no unique ID
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&wszDriveName[0]);
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// insure quadword alignment of the data structure
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assert (((DWORD)(pLCD) & 0x00000007) == 0);
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// Set up pointer for data collection
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// the QueueDepth counter is only a byte so clear the unused bytes
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pDiskPerformance->QueueDepth &= 0x000000FF;
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//
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// Format and collect Physical data
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//
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lcdTotal.DiskCurrentQueueLength += pDiskPerformance->QueueDepth;
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pLCD->DiskCurrentQueueLength = pDiskPerformance->QueueDepth;
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llTemp = pDiskPerformance->ReadTime.QuadPart +
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pDiskPerformance->WriteTime.QuadPart;
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// these values are read in 100 NS units but are expected
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// to be in sys perf freq (tick) units for the Sec/op ctrs
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// so convert them here
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dReadTime = (DOUBLE)(pDiskPerformance->ReadTime.QuadPart);
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dWriteTime = (DOUBLE)(pDiskPerformance->WriteTime.QuadPart);
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dTransferTime = (DOUBLE)(llTemp);
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dReadTime *= dSysTickTo100Ns;
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dWriteTime *= dSysTickTo100Ns;
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dTransferTime *= dSysTickTo100Ns;
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pLCD->DiskTime = llTemp;
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pLCD->DiskAvgQueueLength = llTemp;
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lcdTotal.DiskAvgQueueLength += llTemp;
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lcdTotal.DiskTime += llTemp;
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pLCD->DiskReadTime = pDiskPerformance->ReadTime.QuadPart;
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pLCD->DiskReadQueueLength = pDiskPerformance->ReadTime.QuadPart;
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lcdTotal.DiskReadTime += pDiskPerformance->ReadTime.QuadPart;
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lcdTotal.DiskReadQueueLength += pDiskPerformance->ReadTime.QuadPart;
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pLCD->DiskWriteTime = pDiskPerformance->WriteTime.QuadPart;
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pLCD->DiskWriteQueueLength = pDiskPerformance->WriteTime.QuadPart;
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lcdTotal.DiskWriteTime += pDiskPerformance->WriteTime.QuadPart;
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lcdTotal.DiskWriteQueueLength += pDiskPerformance->WriteTime.QuadPart;
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pLCD->DiskAvgTime = (LONGLONG)dTransferTime;
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lcdTotal.DiskAvgTime += (LONGLONG)dTransferTime;
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dwTemp = pDiskPerformance->ReadCount +
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pDiskPerformance->WriteCount;
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lcdTotal.DiskTransfersBase1 += dwTemp;
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pLCD->DiskTransfersBase1 = dwTemp;
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lcdTotal.DiskAvgReadTime += (LONGLONG)dReadTime;
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pLCD->DiskAvgReadTime = (LONGLONG)dReadTime;
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lcdTotal.DiskReadsBase1 += pDiskPerformance->ReadCount;
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pLCD->DiskReadsBase1 = pDiskPerformance->ReadCount;
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lcdTotal.DiskAvgWriteTime += (LONGLONG)dWriteTime;
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pLCD->DiskAvgWriteTime = (LONGLONG)dWriteTime;
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lcdTotal.DiskWritesBase1 += pDiskPerformance->WriteCount;
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pLCD->DiskWritesBase1 = pDiskPerformance->WriteCount;
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lcdTotal.DiskTransfers += dwTemp;
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pLCD->DiskTransfers = dwTemp;
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lcdTotal.DiskReads += pDiskPerformance->ReadCount;
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pLCD->DiskReads = pDiskPerformance->ReadCount;
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lcdTotal.DiskWrites += pDiskPerformance->WriteCount;
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pLCD->DiskWrites = pDiskPerformance->WriteCount;
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llTemp = pDiskPerformance->BytesRead.QuadPart +
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pDiskPerformance->BytesWritten.QuadPart;
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lcdTotal.DiskBytes += llTemp;
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pLCD->DiskBytes = llTemp;
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lcdTotal.DiskReadBytes += pDiskPerformance->BytesRead.QuadPart;
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pLCD->DiskReadBytes = pDiskPerformance->BytesRead.QuadPart;
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lcdTotal.DiskWriteBytes += pDiskPerformance->BytesWritten.QuadPart;
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pLCD->DiskWriteBytes = pDiskPerformance->BytesWritten.QuadPart;
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lcdTotal.DiskAvgBytes += llTemp;
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pLCD->DiskAvgBytes = llTemp;
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lcdTotal.DiskTransfersBase2 += dwTemp;
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pLCD->DiskTransfersBase2 = dwTemp;
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lcdTotal.DiskAvgReadBytes += pDiskPerformance->BytesRead.QuadPart;
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pLCD->DiskAvgReadBytes = pDiskPerformance->BytesRead.QuadPart;
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lcdTotal.DiskReadsBase2 += pDiskPerformance->ReadCount;
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pLCD->DiskReadsBase2 = pDiskPerformance->ReadCount;
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lcdTotal.DiskAvgWriteBytes += pDiskPerformance->BytesWritten.QuadPart;
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pLCD->DiskAvgWriteBytes = pDiskPerformance->BytesWritten.QuadPart;
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lcdTotal.DiskWritesBase2 += pDiskPerformance->WriteCount;
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pLCD->DiskWritesBase2 = pDiskPerformance->WriteCount;
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pLCD->IdleTime = pDiskPerformance->IdleTime.QuadPart;
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lcdTotal.IdleTime += pDiskPerformance->IdleTime.QuadPart;
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pLCD->SplitCount = pDiskPerformance->SplitCount;
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lcdTotal.SplitCount += pDiskPerformance->SplitCount;
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pLCD->DiskTimeTimestamp = pDiskPerformance->QueryTime.QuadPart;
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lcdTotal.DiskTimeTimestamp += pDiskPerformance->QueryTime.QuadPart;
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if (pVolume != NULL) {
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TotalBytes = pVolume->TotalBytes;
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FreeBytes = pVolume->FreeBytes;
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// First two yield percentage of free space;
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// last is for raw count of free space in megabytes
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lcdTotal.DiskFreeMbytes1 +=
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pLCD->DiskFreeMbytes1 = (DWORD)FreeBytes;
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lcdTotal.DiskTotalMbytes +=
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pLCD->DiskTotalMbytes = (DWORD)TotalBytes;
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lcdTotal.DiskFreeMbytes2 +=
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pLCD->DiskFreeMbytes2 = (DWORD)FreeBytes;
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} else {
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if (!NT_SUCCESS (dwStatus)) {
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if (!bShownDiskVolumeMessage) {
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bShownDiskVolumeMessage = ReportEvent (hEventLog,
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EVENTLOG_WARNING_TYPE,
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0,
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PERFDISK_UNABLE_QUERY_VOLUME_INFO,
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NULL,
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0,
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sizeof(DWORD),
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NULL,
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(LPVOID)&dwStatus);
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}
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}
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// Cannot get space information
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pLCD->DiskFreeMbytes1 = 0;
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pLCD->DiskTotalMbytes = 0;
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pLCD->DiskFreeMbytes2 = 0;
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}
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// bump pointers in Perf Data Block
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dwNumLogicalDisks++;
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pLCD->CounterBlock.ByteLength = sizeof (LDISK_COUNTER_DATA);
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pPerfInstanceDefinition = (PPERF_INSTANCE_DEFINITION)&pLCD[1];
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} else {
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// this is a physical drive entry so skip it
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#if _DBG_PRINT_INSTANCES
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OutputDebugStringW ((LPCWSTR)L" (skipped)");
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#endif
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}
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// count the number of items returned
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dwCurrentWmiObjCount++;
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} else {
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// 0 length name string so skip
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}
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// bump pointers inside WMI data block
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if (WmiDiskInfo->WnodeHeader.Linkage != 0) {
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// continue
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WmiDiskInfo = (PWNODE_ALL_DATA) (
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(LPBYTE)WmiDiskInfo + WmiDiskInfo->WnodeHeader.Linkage);
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} else {
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// this is the end of the line
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bMoreEntries = FALSE;
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}
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} // end for each volume
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// see if number of WMI objects returned is different from
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// the last time the instance table was built, if so then
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// remap the letters and redo the instances
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if (dwCurrentWmiObjCount != dwWmiDriveCount) {
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DebugPrint((1, "CollectLDisk: Remap Current %d Drive %d\n",
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dwCurrentWmiObjCount, dwWmiDriveCount));
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bRemapDriveLetters = TRUE;
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dwRemapCount--;
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}
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} while (bRemapDriveLetters && dwRemapCount);
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if (dwNumLogicalDisks > 0) {
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// see if there's room for the TOTAL entry....
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TotalLen =
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// space already used
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(DWORD)((PCHAR) pPerfInstanceDefinition -
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(PCHAR) pLogicalDiskDataDefinition)
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// + estimate of this instance
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+ sizeof(PERF_INSTANCE_DEFINITION)
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+ (lstrlenW(wszTotal) + 1) * sizeof(WCHAR) ;
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TotalLen = QWORD_MULTIPLE (TotalLen);
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TotalLen += sizeof(LDISK_COUNTER_DATA);
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TotalLen = QWORD_MULTIPLE (TotalLen);
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if ( *lpcbTotalBytes < TotalLen ) {
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*lpcbTotalBytes = (DWORD) 0;
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*lpNumObjectTypes = (DWORD) 0;
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dwReturn = ERROR_MORE_DATA;
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} else {
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// normalize the total times
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lcdTotal.DiskTime /= dwNumLogicalDisks;
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lcdTotal.DiskReadTime /= dwNumLogicalDisks;
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lcdTotal.DiskWriteTime /= dwNumLogicalDisks;
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lcdTotal.IdleTime /= dwNumLogicalDisks;
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lcdTotal.DiskTimeTimestamp /= dwNumLogicalDisks;
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MonBuildInstanceDefinition(
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pPerfInstanceDefinition,
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(PVOID *) &pLCD,
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0,
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0,
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(DWORD)-1,
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wszTotal);
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// update the total counters
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// insure quadword alignment of the data structure
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assert (((DWORD)(pLCD) & 0x00000007) == 0);
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memcpy (pLCD, &lcdTotal, sizeof (lcdTotal));
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pLCD->CounterBlock.ByteLength = sizeof(LDISK_COUNTER_DATA);
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// and update the "next byte" pointer
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pPerfInstanceDefinition = (PPERF_INSTANCE_DEFINITION)&pLCD[1];
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// update pointer to next available buffer...
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pLogicalDiskDataDefinition->DiskObjectType.NumInstances =
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dwNumLogicalDisks + 1; // add 1 for "Total" disk
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}
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} else {
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// there are no instances so adjust the pointer for the
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// rest of the code
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pPerfInstanceDefinition = (PERF_INSTANCE_DEFINITION *)
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&pLogicalDiskDataDefinition[1];
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}
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if (dwReturn == ERROR_SUCCESS) {
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*lpcbTotalBytes =
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pLogicalDiskDataDefinition->DiskObjectType.TotalByteLength =
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(DWORD)((PCHAR) pPerfInstanceDefinition -
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(PCHAR) pLogicalDiskDataDefinition);
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#if DBG
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// sanity check on buffer size estimates
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if (*lpcbTotalBytes > TotalLen ) {
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DbgPrint ("\nPERFDISK: Logical Disk Perf Ctr. Instance Size Underestimated:");
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DbgPrint ("\nPERFDISK: Estimated size: %d, Actual Size: %d", TotalLen, *lpcbTotalBytes);
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}
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#endif
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*lppData = (LPVOID) pPerfInstanceDefinition;
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*lpNumObjectTypes = 1;
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}
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return dwReturn;
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}
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