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windows-nt/Source/XPSP1/NT/base/screg/winreg/perfdlls/disk/physdisk.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1996 Microsoft Corporation
Module Name:
physdisk.c
Abstract:
This file implements a Performance Object that presents
Physical Disk Performance object data
Created:
Bob Watson 22-Oct-1996
Revision History
--*/
//
// Include Files
//
#include <nt.h>
#include <ntrtl.h>
#include <nturtl.h>
#pragma warning ( disable : 4201 )
#include <ntdddisk.h>
#include <windows.h>
#include <ole2.h>
#include <wmium.h>
#pragma warning ( default : 4201 )
#include <assert.h>
#include <winperf.h>
#include <ntprfctr.h>
#include <perfutil.h>
#include "perfdisk.h"
#if _DBG_PRINT_INSTANCES
#include <wtypes.h>
#include <stdio.h>
#include <stdlib.h>
#endif
#include "diskmsg.h"
#include "dataphys.h"
DWORD APIENTRY
CollectPDiskObjectData(
IN OUT LPVOID *lppData,
IN OUT LPDWORD lpcbTotalBytes,
IN OUT LPDWORD lpNumObjectTypes
)
/*++
Routine Description:
This routine will return the data for the logical disk object
Arguments:
IN OUT LPVOID *lppData
IN: pointer to the address of the buffer to receive the completed
PerfDataBlock and subordinate structures. This routine will
append its data to the buffer starting at the point referenced
by *lppData.
OUT: points to the first byte after the data structure added by this
routine. This routine updated the value at lppdata after appending
its data.
IN OUT LPDWORD lpcbTotalBytes
IN: the address of the DWORD that tells the size in bytes of the
buffer referenced by the lppData argument
OUT: the number of bytes added by this routine is writted to the
DWORD pointed to by this argument
IN OUT LPDWORD NumObjectTypes
IN: the address of the DWORD to receive the number of objects added
by this routine
OUT: the number of objects added by this routine is writted to the
DWORD pointed to by this argument
Returns:
0 if successful, else Win 32 error code of failure
--*/
{
PPDISK_DATA_DEFINITION pPhysicalDiskDataDefinition;
DWORD TotalLen; // Length of the total return block
PDISK_COUNTER_DATA pcdTotal;
DWORD dwStatus = ERROR_SUCCESS;
PPERF_INSTANCE_DEFINITION pPerfInstanceDefinition = NULL;
PWNODE_ALL_DATA WmiDiskInfo;
DISK_PERFORMANCE *pDiskPerformance; // Disk driver returns counters here
PWCHAR wszWmiInstanceName;
WCHAR wszInstanceName[MAX_PATH]; // the numbers shouldn't ever get this big
DWORD dwInstanceNameOffset;
DWORD dwNumPhysicalDisks = 0;
PPDISK_COUNTER_DATA pPCD;
BOOL bMoreEntries;
LONGLONG llTemp;
DWORD dwTemp;
DWORD dwReturn = ERROR_SUCCESS;
WORD wNameLength;
BOOL bSkip;
DWORD dwCurrentWmiObjCount = 0;
DWORD dwRemapCount = 10;
DOUBLE dReadTime, dWriteTime, dTransferTime;
//
// Check for sufficient space for Physical Disk object
// type definition
//
do {
dwNumPhysicalDisks = 0;
// make sure the drive letter map is up-to-date
if (bRemapDriveLetters) {
dwStatus = MapDriveLetters();
// MapDriveLetters clears the remap flag when successful
if (dwStatus != ERROR_SUCCESS) {
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
return dwStatus;
}
}
pPhysicalDiskDataDefinition = (PDISK_DATA_DEFINITION *) *lppData;
// clear the accumulator structure
memset (&pcdTotal, 0, sizeof(pcdTotal));
//
// Define Logical Disk data block
//
TotalLen = sizeof (PDISK_DATA_DEFINITION);
if ( *lpcbTotalBytes < TotalLen ) {
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
return ERROR_MORE_DATA;
}
memmove(pPhysicalDiskDataDefinition,
&PhysicalDiskDataDefinition,
sizeof(PDISK_DATA_DEFINITION));
// read the data from the diskperf driver
if (dwStatus == ERROR_SUCCESS) {
pPerfInstanceDefinition = (PERF_INSTANCE_DEFINITION *)
&pPhysicalDiskDataDefinition[1];
WmiDiskInfo = (PWNODE_ALL_DATA)WmiBuffer;
// make sure the structure is valid
if (WmiDiskInfo->WnodeHeader.BufferSize < sizeof(WNODE_ALL_DATA)) {
bMoreEntries = FALSE;
// just to make sure someone notices on a checked build
assert (WmiDiskInfo->WnodeHeader.BufferSize >= sizeof(WNODE_ALL_DATA));
} else {
// make sure there are some entries to return
bMoreEntries =
(WmiDiskInfo->InstanceCount > 0) ? TRUE : FALSE;
}
while (bMoreEntries) {
pDiskPerformance = (PDISK_PERFORMANCE)(
(PUCHAR)WmiDiskInfo + WmiDiskInfo->DataBlockOffset);
dwInstanceNameOffset = *((LPDWORD)(
(LPBYTE)WmiDiskInfo + WmiDiskInfo->OffsetInstanceNameOffsets));
wNameLength = *(WORD *)((LPBYTE)WmiDiskInfo + dwInstanceNameOffset);
if (wNameLength > 0) {
wszWmiInstanceName = (LPWSTR)((LPBYTE)WmiDiskInfo + dwInstanceNameOffset + sizeof(WORD));
if (IsPhysicalDrive(pDiskPerformance)) {
#if _DBG_PRINT_INSTANCES
WCHAR szOutputBuffer[512];
#endif
// then the format is correct AND this is a physical
// partition so set the name string pointer and
// length for use in creating the instance.
memset (wszInstanceName, 0, sizeof(wszInstanceName));
GetPhysicalDriveNameString (
pDiskPerformance->StorageDeviceNumber,
pPhysDiskList,
dwNumPhysDiskListEntries,
wszInstanceName);
#if _DBG_PRINT_INSTANCES
swprintf (szOutputBuffer, (LPCWSTR)L"\nPERFDISK: [%d] PhysDrive [%8.8s,%d] is mapped as: ",
dwNumPhysDiskListEntries,
pDiskPerformance->StorageManagerName,
pDiskPerformance->StorageDeviceNumber);
OutputDebugStringW (szOutputBuffer);
OutputDebugStringW (wszInstanceName);
#endif
bSkip = FALSE;
} else {
bSkip = TRUE;
}
if (!bSkip) {
// first see if there's room for this entry....
TotalLen =
// space already used
(DWORD)((PCHAR) pPerfInstanceDefinition -
(PCHAR) pPhysicalDiskDataDefinition)
// + estimate of this instance
+ sizeof(PERF_INSTANCE_DEFINITION)
+ (lstrlenW(wszInstanceName) + 1) * sizeof(WCHAR) ;
TotalLen = QWORD_MULTIPLE (TotalLen);
TotalLen += sizeof(PDISK_COUNTER_DATA);
TotalLen = QWORD_MULTIPLE (TotalLen);
if ( *lpcbTotalBytes < TotalLen ) {
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
dwReturn = ERROR_MORE_DATA;
break;
}
MonBuildInstanceDefinition(
pPerfInstanceDefinition,
(PVOID *) &pPCD,
0, 0, // no parent
(DWORD)-1,// no unique ID
wszInstanceName);
// clear counter data block
memset (pPCD, 0, sizeof(PDISK_COUNTER_DATA));
pPCD->CounterBlock.ByteLength = sizeof(PDISK_COUNTER_DATA);
// KdPrint (("PERFDISK: (P) Entry %8.8x for: %ws\n", (DWORD)pPCD, wszWmiInstanceName));
// insure quadword alignment of the data structure
assert (((DWORD)(pPCD) & 0x00000007) == 0);
// Set up pointer for data collection
// the QueueDepth counter is only a byte so clear the unused bytes
pDiskPerformance->QueueDepth &= 0x000000FF;
//
// Format and collect Physical data
//
pcdTotal.DiskCurrentQueueLength += pDiskPerformance->QueueDepth;
pPCD->DiskCurrentQueueLength = pDiskPerformance->QueueDepth;
llTemp = pDiskPerformance->ReadTime.QuadPart +
pDiskPerformance->WriteTime.QuadPart;
// these values are read in 100 NS units but are expected
// to be in sys perf freq (tick) units for the Sec/op ctrs
// so convert them here
dReadTime = (DOUBLE)(pDiskPerformance->ReadTime.QuadPart);
dWriteTime = (DOUBLE)(pDiskPerformance->WriteTime.QuadPart);
dTransferTime = (DOUBLE)(llTemp);
dReadTime *= dSysTickTo100Ns;
dWriteTime *= dSysTickTo100Ns;
dTransferTime *= dSysTickTo100Ns;
pPCD->DiskTime = llTemp;
pPCD->DiskAvgQueueLength = llTemp;
pcdTotal.DiskAvgQueueLength += llTemp;
pcdTotal.DiskTime += llTemp;
pPCD->DiskReadTime = pDiskPerformance->ReadTime.QuadPart;
pPCD->DiskReadQueueLength = pDiskPerformance->ReadTime.QuadPart;
pcdTotal.DiskReadTime += pDiskPerformance->ReadTime.QuadPart;
pcdTotal.DiskReadQueueLength += pDiskPerformance->ReadTime.QuadPart;
pPCD->DiskWriteTime = pDiskPerformance->WriteTime.QuadPart;
pPCD->DiskWriteQueueLength = pDiskPerformance->WriteTime.QuadPart;
pcdTotal.DiskWriteTime += pDiskPerformance->WriteTime.QuadPart;
pcdTotal.DiskWriteQueueLength += pDiskPerformance->WriteTime.QuadPart;
pPCD->DiskAvgTime = (LONGLONG)dTransferTime;
pcdTotal.DiskAvgTime += (LONGLONG)dTransferTime;
dwTemp = pDiskPerformance->ReadCount +
pDiskPerformance->WriteCount;
pcdTotal.DiskTransfersBase1 += dwTemp;
pPCD->DiskTransfersBase1 = dwTemp;
pcdTotal.DiskAvgReadTime += (LONGLONG)dReadTime;
pPCD->DiskAvgReadTime = (LONGLONG)dReadTime;
pcdTotal.DiskReadsBase1 += pDiskPerformance->ReadCount;
pPCD->DiskReadsBase1 = pDiskPerformance->ReadCount;
pcdTotal.DiskAvgWriteTime += (LONGLONG)dWriteTime;
pPCD->DiskAvgWriteTime = (LONGLONG)dWriteTime;
pcdTotal.DiskWritesBase1 += pDiskPerformance->WriteCount;
pPCD->DiskWritesBase1 = pDiskPerformance->WriteCount;
pcdTotal.DiskTransfers += dwTemp;
pPCD->DiskTransfers = dwTemp;
pcdTotal.DiskReads += pDiskPerformance->ReadCount;
pPCD->DiskReads = pDiskPerformance->ReadCount;
pcdTotal.DiskWrites += pDiskPerformance->WriteCount;
pPCD->DiskWrites = pDiskPerformance->WriteCount;
llTemp = pDiskPerformance->BytesRead.QuadPart +
pDiskPerformance->BytesWritten.QuadPart;
pcdTotal.DiskBytes += llTemp;
pPCD->DiskBytes = llTemp;
pcdTotal.DiskReadBytes += pDiskPerformance->BytesRead.QuadPart;
pPCD->DiskReadBytes = pDiskPerformance->BytesRead.QuadPart;
pcdTotal.DiskWriteBytes += pDiskPerformance->BytesWritten.QuadPart;
pPCD->DiskWriteBytes = pDiskPerformance->BytesWritten.QuadPart;
pcdTotal.DiskAvgBytes += llTemp;
pPCD->DiskAvgBytes = llTemp;
pcdTotal.DiskTransfersBase2 += dwTemp;
pPCD->DiskTransfersBase2 = dwTemp;
pcdTotal.DiskAvgReadBytes += pDiskPerformance->BytesRead.QuadPart;
pPCD->DiskAvgReadBytes = pDiskPerformance->BytesRead.QuadPart;
pcdTotal.DiskReadsBase2 += pDiskPerformance->ReadCount;
pPCD->DiskReadsBase2 = pDiskPerformance->ReadCount;
pcdTotal.DiskAvgWriteBytes += pDiskPerformance->BytesWritten.QuadPart;
pPCD->DiskAvgWriteBytes = pDiskPerformance->BytesWritten.QuadPart;
pcdTotal.DiskWritesBase2 += pDiskPerformance->WriteCount;
pPCD->DiskWritesBase2 = pDiskPerformance->WriteCount;
pPCD->IdleTime = pDiskPerformance->IdleTime.QuadPart;
pcdTotal.IdleTime += pDiskPerformance->IdleTime.QuadPart;
pPCD->SplitCount = pDiskPerformance->SplitCount;
pcdTotal.SplitCount += pDiskPerformance->SplitCount;
pPCD->DiskTimeTimeStamp = pDiskPerformance->QueryTime.QuadPart;
pcdTotal.DiskTimeTimeStamp += pDiskPerformance->QueryTime.QuadPart;
// move to the end of the buffer for the next instance
pPerfInstanceDefinition = (PPERF_INSTANCE_DEFINITION)&pPCD[1];
dwNumPhysicalDisks++;
} else {
// KdPrint (("PERFDISK: (P) Skipping Instance: %ws\n", wszWmiInstanceName));
}
// count the number of items returned by WMI
dwCurrentWmiObjCount++;
} else {
// the name has 0 length so skip
}
// bump pointers inside WMI data block
if (WmiDiskInfo->WnodeHeader.Linkage != 0) {
// continue
WmiDiskInfo = (PWNODE_ALL_DATA) (
(LPBYTE)WmiDiskInfo + WmiDiskInfo->WnodeHeader.Linkage);
} else {
// this is the end of the line
bMoreEntries = FALSE;
}
} // end for each volume
// see if number of WMI objects returned is different from
// the last time the instance table was built, if so then
// remap the letters and redo the instances
if (dwCurrentWmiObjCount != dwWmiDriveCount) {
DebugPrint((1, "CollectPDisk: Remap Current %d Drive %d\n",
dwCurrentWmiObjCount, dwWmiDriveCount));
bRemapDriveLetters = TRUE;
dwRemapCount--;
}
} // end if mem init was successful
} while (bRemapDriveLetters && dwRemapCount);
if ((dwNumPhysicalDisks > 0) && (dwStatus == ERROR_SUCCESS)) {
// see if there's room for this entry....
TotalLen =
// space already used
(DWORD)((PCHAR) pPerfInstanceDefinition -
(PCHAR) pPhysicalDiskDataDefinition)
// + estimate of this instance
+ sizeof(PERF_INSTANCE_DEFINITION)
+ (lstrlenW(wszTotal) + 1) * sizeof(WCHAR) ;
TotalLen = QWORD_MULTIPLE (TotalLen);
TotalLen += sizeof(PDISK_COUNTER_DATA);
TotalLen = QWORD_MULTIPLE (TotalLen);
if ( *lpcbTotalBytes < TotalLen ) {
*lpcbTotalBytes = (DWORD) 0;
*lpNumObjectTypes = (DWORD) 0;
dwReturn = ERROR_MORE_DATA;
} else {
// normalize the total times
pcdTotal.DiskTime /= dwNumPhysicalDisks;
pcdTotal.DiskReadTime /= dwNumPhysicalDisks;
pcdTotal.DiskWriteTime /= dwNumPhysicalDisks;
pcdTotal.IdleTime /= dwNumPhysicalDisks;
pcdTotal.DiskTimeTimeStamp /= dwNumPhysicalDisks;
MonBuildInstanceDefinition(
pPerfInstanceDefinition,
(PVOID *) &pPCD,
0,
0,
(DWORD)-1,
wszTotal);
// update the total counters
// insure quadword alignment of the data structure
assert (((DWORD)(pPCD) & 0x00000007) == 0);
memcpy (pPCD, &pcdTotal, sizeof (pcdTotal));
pPCD->CounterBlock.ByteLength = sizeof(PDISK_COUNTER_DATA);
// and update the "next byte" pointer
pPerfInstanceDefinition = (PPERF_INSTANCE_DEFINITION)&pPCD[1];
// update pointer to next available buffer...
pPhysicalDiskDataDefinition->DiskObjectType.NumInstances =
dwNumPhysicalDisks + 1; // add 1 for "Total" disk
}
} else {
// If we are diskless, then return no instances
pPerfInstanceDefinition = (PERF_INSTANCE_DEFINITION *)
&pPhysicalDiskDataDefinition[1];
pPhysicalDiskDataDefinition->DiskObjectType.NumInstances = 0;
}
if (dwReturn == ERROR_SUCCESS) {
*lpcbTotalBytes =
pPhysicalDiskDataDefinition->DiskObjectType.TotalByteLength =
(DWORD)((PCHAR) pPerfInstanceDefinition -
(PCHAR) pPhysicalDiskDataDefinition);
#if DBG
// sanity check on buffer size estimates
if (*lpcbTotalBytes > TotalLen ) {
DbgPrint ("\nPERFDISK: Physical Disk Perf Ctr. Instance Size Underestimated:");
DbgPrint ("\nPERFDISK: Estimated size: %d, Actual Size: %d", TotalLen, *lpcbTotalBytes);
}
#endif
*lppData = (LPVOID) pPerfInstanceDefinition;
*lpNumObjectTypes = 1;
}
return dwReturn;
}
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