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466 lines
18 KiB
466 lines
18 KiB
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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physdisk.c
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Abstract:
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This file implements a Performance Object that presents
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Physical 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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#if _DBG_PRINT_INSTANCES
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#include <wtypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#endif
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#include "diskmsg.h"
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#include "dataphys.h"
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DWORD APIENTRY
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CollectPDiskObjectData(
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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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PPDISK_DATA_DEFINITION pPhysicalDiskDataDefinition;
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DWORD TotalLen; // Length of the total return block
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PDISK_COUNTER_DATA pcdTotal;
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DWORD dwStatus = ERROR_SUCCESS;
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PPERF_INSTANCE_DEFINITION pPerfInstanceDefinition = NULL;
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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 wszWmiInstanceName;
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WCHAR wszInstanceName[MAX_PATH]; // the numbers shouldn't ever get this big
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DWORD dwInstanceNameOffset;
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DWORD dwNumPhysicalDisks = 0;
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PPDISK_COUNTER_DATA pPCD;
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BOOL bMoreEntries;
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LONGLONG llTemp;
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DWORD dwTemp;
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DWORD dwReturn = ERROR_SUCCESS;
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WORD wNameLength;
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BOOL bSkip;
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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 Physical Disk object
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// type definition
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//
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do {
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dwNumPhysicalDisks = 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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pPhysicalDiskDataDefinition = (PDISK_DATA_DEFINITION *) *lppData;
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// clear the accumulator structure
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memset (&pcdTotal, 0, sizeof(pcdTotal));
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//
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// Define Logical Disk data block
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//
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TotalLen = sizeof (PDISK_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(pPhysicalDiskDataDefinition,
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&PhysicalDiskDataDefinition,
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sizeof(PDISK_DATA_DEFINITION));
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// read the data from the diskperf driver
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if (dwStatus == ERROR_SUCCESS) {
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pPerfInstanceDefinition = (PERF_INSTANCE_DEFINITION *)
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&pPhysicalDiskDataDefinition[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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pDiskPerformance = (PDISK_PERFORMANCE)(
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(PUCHAR)WmiDiskInfo + WmiDiskInfo->DataBlockOffset);
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dwInstanceNameOffset = *((LPDWORD)(
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(LPBYTE)WmiDiskInfo + WmiDiskInfo->OffsetInstanceNameOffsets));
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wNameLength = *(WORD *)((LPBYTE)WmiDiskInfo + dwInstanceNameOffset);
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if (wNameLength > 0) {
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wszWmiInstanceName = (LPWSTR)((LPBYTE)WmiDiskInfo + dwInstanceNameOffset + sizeof(WORD));
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if (IsPhysicalDrive(pDiskPerformance)) {
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#if _DBG_PRINT_INSTANCES
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WCHAR szOutputBuffer[512];
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#endif
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// then the format is correct AND this is a physical
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// partition so set the name string pointer and
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// length for use in creating the instance.
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memset (wszInstanceName, 0, sizeof(wszInstanceName));
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GetPhysicalDriveNameString (
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pDiskPerformance->StorageDeviceNumber,
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pPhysDiskList,
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dwNumPhysDiskListEntries,
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wszInstanceName);
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#if _DBG_PRINT_INSTANCES
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swprintf (szOutputBuffer, (LPCWSTR)L"\nPERFDISK: [%d] PhysDrive [%8.8s,%d] is mapped as: ",
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dwNumPhysDiskListEntries,
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pDiskPerformance->StorageManagerName,
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pDiskPerformance->StorageDeviceNumber);
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OutputDebugStringW (szOutputBuffer);
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OutputDebugStringW (wszInstanceName);
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#endif
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bSkip = FALSE;
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} else {
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bSkip = TRUE;
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}
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if (!bSkip) {
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// first see if there's room for this 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) pPhysicalDiskDataDefinition)
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// + estimate of this instance
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+ sizeof(PERF_INSTANCE_DEFINITION)
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+ (lstrlenW(wszInstanceName) + 1) * sizeof(WCHAR) ;
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TotalLen = QWORD_MULTIPLE (TotalLen);
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TotalLen += sizeof(PDISK_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 *) &pPCD,
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0, 0, // no parent
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(DWORD)-1,// no unique ID
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wszInstanceName);
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// clear counter data block
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memset (pPCD, 0, sizeof(PDISK_COUNTER_DATA));
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pPCD->CounterBlock.ByteLength = sizeof(PDISK_COUNTER_DATA);
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// KdPrint (("PERFDISK: (P) Entry %8.8x for: %ws\n", (DWORD)pPCD, wszWmiInstanceName));
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// insure quadword alignment of the data structure
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assert (((DWORD)(pPCD) & 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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pcdTotal.DiskCurrentQueueLength += pDiskPerformance->QueueDepth;
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pPCD->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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pPCD->DiskTime = llTemp;
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pPCD->DiskAvgQueueLength = llTemp;
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pcdTotal.DiskAvgQueueLength += llTemp;
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pcdTotal.DiskTime += llTemp;
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pPCD->DiskReadTime = pDiskPerformance->ReadTime.QuadPart;
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pPCD->DiskReadQueueLength = pDiskPerformance->ReadTime.QuadPart;
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pcdTotal.DiskReadTime += pDiskPerformance->ReadTime.QuadPart;
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pcdTotal.DiskReadQueueLength += pDiskPerformance->ReadTime.QuadPart;
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pPCD->DiskWriteTime = pDiskPerformance->WriteTime.QuadPart;
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pPCD->DiskWriteQueueLength = pDiskPerformance->WriteTime.QuadPart;
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pcdTotal.DiskWriteTime += pDiskPerformance->WriteTime.QuadPart;
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pcdTotal.DiskWriteQueueLength += pDiskPerformance->WriteTime.QuadPart;
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pPCD->DiskAvgTime = (LONGLONG)dTransferTime;
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pcdTotal.DiskAvgTime += (LONGLONG)dTransferTime;
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dwTemp = pDiskPerformance->ReadCount +
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pDiskPerformance->WriteCount;
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pcdTotal.DiskTransfersBase1 += dwTemp;
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pPCD->DiskTransfersBase1 = dwTemp;
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pcdTotal.DiskAvgReadTime += (LONGLONG)dReadTime;
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pPCD->DiskAvgReadTime = (LONGLONG)dReadTime;
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pcdTotal.DiskReadsBase1 += pDiskPerformance->ReadCount;
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pPCD->DiskReadsBase1 = pDiskPerformance->ReadCount;
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pcdTotal.DiskAvgWriteTime += (LONGLONG)dWriteTime;
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pPCD->DiskAvgWriteTime = (LONGLONG)dWriteTime;
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pcdTotal.DiskWritesBase1 += pDiskPerformance->WriteCount;
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pPCD->DiskWritesBase1 = pDiskPerformance->WriteCount;
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pcdTotal.DiskTransfers += dwTemp;
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pPCD->DiskTransfers = dwTemp;
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pcdTotal.DiskReads += pDiskPerformance->ReadCount;
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pPCD->DiskReads = pDiskPerformance->ReadCount;
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pcdTotal.DiskWrites += pDiskPerformance->WriteCount;
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pPCD->DiskWrites = pDiskPerformance->WriteCount;
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llTemp = pDiskPerformance->BytesRead.QuadPart +
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pDiskPerformance->BytesWritten.QuadPart;
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pcdTotal.DiskBytes += llTemp;
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pPCD->DiskBytes = llTemp;
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pcdTotal.DiskReadBytes += pDiskPerformance->BytesRead.QuadPart;
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pPCD->DiskReadBytes = pDiskPerformance->BytesRead.QuadPart;
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pcdTotal.DiskWriteBytes += pDiskPerformance->BytesWritten.QuadPart;
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pPCD->DiskWriteBytes = pDiskPerformance->BytesWritten.QuadPart;
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pcdTotal.DiskAvgBytes += llTemp;
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pPCD->DiskAvgBytes = llTemp;
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pcdTotal.DiskTransfersBase2 += dwTemp;
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pPCD->DiskTransfersBase2 = dwTemp;
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pcdTotal.DiskAvgReadBytes += pDiskPerformance->BytesRead.QuadPart;
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pPCD->DiskAvgReadBytes = pDiskPerformance->BytesRead.QuadPart;
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pcdTotal.DiskReadsBase2 += pDiskPerformance->ReadCount;
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pPCD->DiskReadsBase2 = pDiskPerformance->ReadCount;
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pcdTotal.DiskAvgWriteBytes += pDiskPerformance->BytesWritten.QuadPart;
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pPCD->DiskAvgWriteBytes = pDiskPerformance->BytesWritten.QuadPart;
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pcdTotal.DiskWritesBase2 += pDiskPerformance->WriteCount;
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pPCD->DiskWritesBase2 = pDiskPerformance->WriteCount;
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pPCD->IdleTime = pDiskPerformance->IdleTime.QuadPart;
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pcdTotal.IdleTime += pDiskPerformance->IdleTime.QuadPart;
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pPCD->SplitCount = pDiskPerformance->SplitCount;
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pcdTotal.SplitCount += pDiskPerformance->SplitCount;
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pPCD->DiskTimeTimeStamp = pDiskPerformance->QueryTime.QuadPart;
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pcdTotal.DiskTimeTimeStamp += pDiskPerformance->QueryTime.QuadPart;
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// move to the end of the buffer for the next instance
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pPerfInstanceDefinition = (PPERF_INSTANCE_DEFINITION)&pPCD[1];
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dwNumPhysicalDisks++;
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} else {
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// KdPrint (("PERFDISK: (P) Skipping Instance: %ws\n", wszWmiInstanceName));
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}
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// count the number of items returned by WMI
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dwCurrentWmiObjCount++;
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} else {
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// the name has 0 length 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, "CollectPDisk: 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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} // end if mem init was successful
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} while (bRemapDriveLetters && dwRemapCount);
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if ((dwNumPhysicalDisks > 0) && (dwStatus == ERROR_SUCCESS)) {
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// see if there's room for this 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) pPhysicalDiskDataDefinition)
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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(PDISK_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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pcdTotal.DiskTime /= dwNumPhysicalDisks;
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pcdTotal.DiskReadTime /= dwNumPhysicalDisks;
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pcdTotal.DiskWriteTime /= dwNumPhysicalDisks;
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pcdTotal.IdleTime /= dwNumPhysicalDisks;
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pcdTotal.DiskTimeTimeStamp /= dwNumPhysicalDisks;
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MonBuildInstanceDefinition(
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pPerfInstanceDefinition,
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(PVOID *) &pPCD,
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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)(pPCD) & 0x00000007) == 0);
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memcpy (pPCD, &pcdTotal, sizeof (pcdTotal));
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pPCD->CounterBlock.ByteLength = sizeof(PDISK_COUNTER_DATA);
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// and update the "next byte" pointer
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pPerfInstanceDefinition = (PPERF_INSTANCE_DEFINITION)&pPCD[1];
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// update pointer to next available buffer...
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pPhysicalDiskDataDefinition->DiskObjectType.NumInstances =
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dwNumPhysicalDisks + 1; // add 1 for "Total" disk
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}
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} else {
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// If we are diskless, then return no instances
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pPerfInstanceDefinition = (PERF_INSTANCE_DEFINITION *)
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&pPhysicalDiskDataDefinition[1];
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pPhysicalDiskDataDefinition->DiskObjectType.NumInstances = 0;
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}
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if (dwReturn == ERROR_SUCCESS) {
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*lpcbTotalBytes =
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pPhysicalDiskDataDefinition->DiskObjectType.TotalByteLength =
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(DWORD)((PCHAR) pPerfInstanceDefinition -
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(PCHAR) pPhysicalDiskDataDefinition);
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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: Physical 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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