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85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/**
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* @file sys/statistics.c
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*
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* @copyright 2015-2016 Bill Zissimopoulos
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*/
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/*
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* This file is part of WinFsp.
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*
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* You can redistribute it and/or modify it under the terms of the GNU
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* General Public License version 3 as published by the Free Software
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* Foundation.
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*
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* Licensees holding a valid commercial license may use this file in
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* accordance with the commercial license agreement provided with the
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* software.
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*/
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#include <sys/driver.h>
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NTSTATUS FspStatisticsCreate(FSP_STATISTICS **PStatistics);
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VOID FspStatisticsDelete(FSP_STATISTICS *Statistics);
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NTSTATUS FspStatisticsCopy(FSP_STATISTICS *Statistics, PVOID Buffer, PULONG PLength);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, FspStatisticsCreate)
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#pragma alloc_text(PAGE, FspStatisticsDelete)
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#pragma alloc_text(PAGE, FspStatisticsCopy)
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#endif
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NTSTATUS FspStatisticsCreate(FSP_STATISTICS **PStatistics)
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{
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*PStatistics = FspAllocNonPaged(sizeof(FSP_STATISTICS) * FspProcessorCount);
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if (0 == *PStatistics)
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return STATUS_INSUFFICIENT_RESOURCES;
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RtlZeroMemory(*PStatistics, sizeof(FSP_STATISTICS) * FspProcessorCount);
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for (ULONG Index = 0; FspProcessorCount > Index; Index++)
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{
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FSP_STATISTICS *Statistics = *PStatistics + Index;
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/* pretend that we are FAT when it comes to stats */
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Statistics->Base.FileSystemType = FILESYSTEM_STATISTICS_TYPE_FAT;
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Statistics->Base.Version = 1;
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Statistics->Base.SizeOfCompleteStructure = sizeof(FSP_STATISTICS);
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}
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return STATUS_SUCCESS;
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}
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VOID FspStatisticsDelete(FSP_STATISTICS *Statistics)
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{
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FspFree(Statistics);
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}
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NTSTATUS FspStatisticsCopy(FSP_STATISTICS *Statistics, PVOID Buffer, PULONG PLength)
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{
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NTSTATUS Result;
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ULONG StatLength;
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if (0 == Buffer)
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{
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*PLength = 0;
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return STATUS_INVALID_PARAMETER;
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}
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if (sizeof(FILESYSTEM_STATISTICS) > *PLength)
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{
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*PLength = 0;
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return STATUS_BUFFER_TOO_SMALL;
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}
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StatLength = sizeof(FSP_STATISTICS) * FspProcessorCount;
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if (*PLength >= StatLength)
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{
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*PLength = StatLength;
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Result = STATUS_SUCCESS;
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}
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else
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Result = STATUS_BUFFER_OVERFLOW;
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RtlCopyMemory(Buffer, Statistics, *PLength);
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return Result;
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}
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