1050 lines
26 KiB
C++
1050 lines
26 KiB
C++
/*++
|
|
|
|
Copyright (C) 2000-2001 Microsoft Corporation
|
|
|
|
--*/
|
|
|
|
#include <wbemcomn.h>
|
|
#include <reposit.h>
|
|
#include <sync.h>
|
|
#include <malloc.h>
|
|
#include "longstg.h"
|
|
|
|
|
|
#define A51_INSTRUCTION_TYPE_WRITEFILE 1
|
|
#define A51_INSTRUCTION_TYPE_SETENDOFFILE 2
|
|
|
|
CTempMemoryManager g_LongFileCacheManager;
|
|
|
|
__int64 CWriteFileInstruction::mstatic_lNextZOrder = 0;
|
|
|
|
DWORD g_dwFailureCount = 0;
|
|
DWORD g_dwFailureFrequency = 0;
|
|
DWORD g_dwLastFailureCheck = 0;
|
|
#define FAILURE_INJECTION_CHECK_INTERVAL 10000
|
|
|
|
CLongFileInstruction::CLongFileInstruction(CLongFileStagingFile* pFile)
|
|
: CStageInstruction(pFile)
|
|
{
|
|
}
|
|
|
|
CLongFileInstruction::CLongFileInstruction(CLongFileStagingFile* pFile,
|
|
int nFileId, TFileOffset lStartOffset)
|
|
: CStageInstruction(pFile), m_Location(nFileId, lStartOffset)
|
|
{
|
|
}
|
|
|
|
|
|
DWORD CLongFileInstruction::ComputeSpaceForLocation()
|
|
{
|
|
return (sizeof(BYTE) + sizeof(m_Location.m_lStartOffset));
|
|
}
|
|
|
|
long CLongFileInstruction::RecoverLocation(HANDLE hFile)
|
|
{
|
|
DWORD dwRead;
|
|
|
|
BYTE nFileId;
|
|
if(!ReadFile(hFile, &nFileId, sizeof(BYTE), &dwRead, NULL))
|
|
return GetLastError();
|
|
|
|
m_Location.m_nFileId = nFileId;
|
|
|
|
if(!ReadFile(hFile, (BYTE*)&m_Location.m_lStartOffset,
|
|
sizeof m_Location.m_lStartOffset, &dwRead, NULL))
|
|
{
|
|
return GetLastError();
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
BYTE* CLongFileInstruction::WriteLocation(BYTE* pBuffer)
|
|
{
|
|
*pBuffer = (BYTE)m_Location.m_nFileId;
|
|
memcpy(pBuffer + 1, (BYTE*)&m_Location.m_lStartOffset,
|
|
sizeof m_Location.m_lStartOffset);
|
|
return pBuffer + 1 + sizeof m_Location.m_lStartOffset;
|
|
}
|
|
|
|
void CLongFileInstruction::Dump()
|
|
{
|
|
ERRORTRACE((LOG_WBEMCORE, "File %d, Start %d, stage offset %d\n",
|
|
(int)m_Location.m_nFileId, (int)m_Location.m_lStartOffset,
|
|
(int)m_lStageOffset));
|
|
}
|
|
|
|
void CWriteFileInstruction::Dump()
|
|
{
|
|
ERRORTRACE((LOG_WBEMCORE, "File %d, Start %d, Len %d, stage offset %d\n",
|
|
(int)m_Location.m_nFileId, (int)m_Location.m_lStartOffset,
|
|
(int)m_dwLen, (int)m_lStageOffset));
|
|
}
|
|
void CWriteFileInstruction::MakeTopmost()
|
|
{
|
|
m_lZOrder = mstatic_lNextZOrder++;
|
|
}
|
|
DWORD CWriteFileInstruction::ComputeNeededSpace()
|
|
{
|
|
if (!m_bReuse)
|
|
return sizeof(BYTE) + // for the type
|
|
ComputeSpaceForLocation() +
|
|
sizeof(DWORD) + // for the length of data
|
|
m_dwLen + // for the data
|
|
A51_TAIL_SIZE; // for the trailer
|
|
else
|
|
return sizeof(BYTE) + // for the type
|
|
ComputeSpaceForLocation() +
|
|
sizeof(DWORD) + // for the length of data
|
|
m_dwLen; // for the data
|
|
//NO TAIL if we are re-using the old write instruction as they are overwritten
|
|
//by next instruction in log
|
|
}
|
|
|
|
TFileOffset CWriteFileInstruction::ComputeOriginalOffset()
|
|
{
|
|
return m_lStageOffset - sizeof(BYTE) - ComputeSpaceForLocation() -
|
|
sizeof(DWORD);
|
|
}
|
|
|
|
long CWriteFileInstruction::Write(TFileOffset lOffset, BYTE* pBuffer)
|
|
{
|
|
_ASSERT(m_Location.m_lStartOffset >= 0 && m_Location.m_lStartOffset < 0x70000000, L"");
|
|
|
|
//
|
|
// Construct an in-memory buffer large enough for the whole thing
|
|
//
|
|
|
|
DWORD dwNeededSpace = ComputeNeededSpace();
|
|
BYTE* pWholeBuffer = (BYTE*)TempAlloc(dwNeededSpace);
|
|
if(pWholeBuffer == NULL)
|
|
return ERROR_OUTOFMEMORY;
|
|
CTempFreeMe vdm(pWholeBuffer, dwNeededSpace);
|
|
|
|
BYTE* pCurrent = pWholeBuffer;
|
|
|
|
//
|
|
// Write instruction type
|
|
//
|
|
|
|
*pCurrent = A51_INSTRUCTION_TYPE_WRITEFILE;
|
|
pCurrent++;
|
|
|
|
//
|
|
// Write location
|
|
//
|
|
|
|
pCurrent = WriteLocation(pCurrent);
|
|
|
|
//
|
|
// Write the length of the data for the file
|
|
//
|
|
|
|
memcpy(pCurrent, (void*)&m_dwLen, sizeof(DWORD));
|
|
pCurrent += sizeof(DWORD);
|
|
|
|
//
|
|
// Write the data itself and record its offset
|
|
//
|
|
|
|
memcpy(pCurrent, pBuffer, m_dwLen);
|
|
m_lStageOffset = lOffset + (pCurrent - pWholeBuffer);
|
|
|
|
//
|
|
// Write the trailer - only if this is an original instruction. In the
|
|
// case of a reused instruction we ignore the tail because it had already
|
|
// (probably) been overwritten
|
|
//
|
|
|
|
if (!m_bReuse)
|
|
memset(pCurrent + m_dwLen, 0, sizeof(DWORD));
|
|
|
|
//
|
|
// Write it
|
|
//
|
|
|
|
return m_pManager->WriteInstruction(lOffset, pWholeBuffer, dwNeededSpace, m_bReuse);
|
|
}
|
|
|
|
long CWriteFileInstruction::RecoverData(HANDLE hFile)
|
|
{
|
|
//
|
|
// Recover the file name first
|
|
//
|
|
|
|
long lRes = RecoverLocation(hFile);
|
|
if(lRes != ERROR_SUCCESS)
|
|
return lRes;
|
|
|
|
//
|
|
// Read the length of the data from the file
|
|
//
|
|
|
|
DWORD dwRead;
|
|
|
|
if(!ReadFile(hFile, (BYTE*)&m_dwLen, sizeof(DWORD), &dwRead, NULL))
|
|
return GetLastError();
|
|
|
|
if(dwRead != sizeof(DWORD))
|
|
return ERROR_HANDLE_EOF;
|
|
|
|
//
|
|
// We do not need to actually read the data from the file --- we keep it
|
|
// there until it is time to flush. But we do need to skip it. At the same
|
|
// time, we need to record the position in the file where this data resides
|
|
//
|
|
|
|
LARGE_INTEGER liFileLen;
|
|
liFileLen.QuadPart = m_dwLen;
|
|
|
|
LARGE_INTEGER liNewPosition;
|
|
if(!SetFilePointerEx(hFile, liFileLen, &liNewPosition, FILE_CURRENT))
|
|
return GetLastError();
|
|
|
|
_ASSERT(liNewPosition.HighPart == 0, L"Staging file too long!");
|
|
|
|
m_lStageOffset = (long)(liNewPosition.QuadPart - m_dwLen);
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
void CWriteFileInstruction::GetEnd(CFileLocation* pLocation)
|
|
{
|
|
pLocation->m_nFileId = m_Location.m_nFileId;
|
|
pLocation->m_lStartOffset = m_Location.m_lStartOffset + m_dwLen - 1;
|
|
}
|
|
|
|
long CWriteFileInstruction::GetData(HANDLE hFile, long lExtraOffset,
|
|
DWORD dwLen, BYTE* pBuffer)
|
|
{
|
|
//
|
|
// Lock the file
|
|
//
|
|
|
|
CInCritSec ics(m_pManager->GetLock());
|
|
|
|
_ASSERT(m_pManager->GetFirstFreeOffset() >= m_lStageOffset,
|
|
L"Instruction points to empty space in stage file");
|
|
|
|
long lRes = A51ReadFromFileSync(hFile, m_lStageOffset + lExtraOffset,
|
|
pBuffer, dwLen);
|
|
if(lRes != ERROR_SUCCESS)
|
|
{
|
|
return lRes;
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
|
|
long CWriteFileInstruction::Execute()
|
|
{
|
|
long lRes;
|
|
|
|
//
|
|
// Read the data from the staging file
|
|
//
|
|
|
|
BYTE* pBuffer = (BYTE*)TempAlloc(m_dwLen);
|
|
if(pBuffer == NULL)
|
|
return ERROR_OUTOFMEMORY;
|
|
CTempFreeMe tfm(pBuffer);
|
|
|
|
lRes = GetData(m_pManager->GetHandle(), 0, m_dwLen, pBuffer);
|
|
if(lRes != ERROR_SUCCESS)
|
|
return lRes;
|
|
|
|
lRes = ((CLongFileStagingFile*)m_pManager)->WriteToActualFile(
|
|
m_Location.m_nFileId, m_Location.m_lStartOffset,
|
|
pBuffer, m_dwLen);
|
|
if(lRes != ERROR_SUCCESS)
|
|
{
|
|
return lRes;
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
|
|
DWORD CSetEndOfFileInstruction::ComputeNeededSpace()
|
|
{
|
|
return sizeof(BYTE) + // for instruction type
|
|
ComputeSpaceForLocation() +
|
|
A51_TAIL_SIZE; // for the trailer
|
|
}
|
|
|
|
long CSetEndOfFileInstruction::Write(TFileOffset lOffset)
|
|
{
|
|
//
|
|
// Construct an in-memory buffer large enough for the whole thing
|
|
//
|
|
|
|
DWORD dwNeededSpace = ComputeNeededSpace();
|
|
BYTE* pWholeBuffer = (BYTE*)TempAlloc(dwNeededSpace);
|
|
if(pWholeBuffer == NULL)
|
|
return ERROR_OUTOFMEMORY;
|
|
CTempFreeMe vdm(pWholeBuffer, dwNeededSpace);
|
|
|
|
BYTE* pCurrent = pWholeBuffer;
|
|
|
|
//
|
|
// Write the instruction type
|
|
//
|
|
|
|
*pCurrent = A51_INSTRUCTION_TYPE_SETENDOFFILE;
|
|
pCurrent++;
|
|
|
|
//
|
|
// Write the file name
|
|
//
|
|
|
|
pCurrent = WriteLocation(pCurrent);
|
|
m_lStageOffset = lOffset + (pCurrent - pWholeBuffer);
|
|
|
|
//
|
|
// Write the trailer
|
|
//
|
|
|
|
memset(pCurrent, 0, sizeof(DWORD));
|
|
|
|
//
|
|
// Write it
|
|
//
|
|
|
|
return m_pManager->WriteInstruction(lOffset, pWholeBuffer, dwNeededSpace);
|
|
}
|
|
|
|
long CSetEndOfFileInstruction::RecoverData(HANDLE hFile)
|
|
{
|
|
long lRes = RecoverLocation(hFile);
|
|
if(lRes != ERROR_SUCCESS)
|
|
return lRes;
|
|
|
|
LARGE_INTEGER liZero;
|
|
liZero.QuadPart = 0;
|
|
LARGE_INTEGER liPosition;
|
|
if(!SetFilePointerEx(hFile, liZero, &liPosition, FILE_CURRENT))
|
|
return GetLastError();
|
|
|
|
_ASSERT(liPosition.HighPart == 0, L"Staging file too long!");
|
|
|
|
m_lStageOffset = (long)(liPosition.QuadPart);
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
long CSetEndOfFileInstruction::Execute()
|
|
{
|
|
long lRes = ((CLongFileStagingFile*)m_pManager)->SetEndOfActualFile(
|
|
m_Location.m_nFileId, m_Location.m_lStartOffset);
|
|
return lRes;
|
|
}
|
|
|
|
//
|
|
// CStageManager
|
|
//
|
|
// |
|
|
//
|
|
// CExecutableStageManager
|
|
//
|
|
// |
|
|
//
|
|
// CLongFileStagingFile
|
|
//
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
CLongFileStagingFile::CLongFileStagingFile(long lMaxFileSize,
|
|
long lAbortTransactionFileSize)
|
|
: CExecutableStageManager(lMaxFileSize, lAbortTransactionFileSize),
|
|
m_mapStarts(TMap::key_compare(),
|
|
TMap::allocator_type(&g_LongFileCacheManager)),
|
|
m_mapEnds(TMap::key_compare(),
|
|
TMap::allocator_type(&g_LongFileCacheManager))
|
|
{
|
|
for(int i = 0; i < A51_MAX_FILES; i++)
|
|
m_aFiles[i].m_h = NULL;
|
|
}
|
|
|
|
CLongFileStagingFile::~CLongFileStagingFile()
|
|
{
|
|
}
|
|
|
|
long CLongFileStagingFile::Create(LPCWSTR wszStagingFileName)
|
|
{
|
|
return CExecutableStageManager::Create(wszStagingFileName);
|
|
};
|
|
|
|
long CLongFileStagingFile::Initialize()
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
return CExecutableStageManager::Start();
|
|
};
|
|
|
|
long CLongFileStagingFile::Uninitialize(DWORD dwShutDownFlags)
|
|
{
|
|
|
|
// do not hold the CritSec here, since the FlusherThread needs it
|
|
|
|
CExecutableStageManager::Stop(dwShutDownFlags);
|
|
|
|
CInCritSec ics(&m_cs);
|
|
|
|
CloseAllFiles();
|
|
|
|
m_mapStarts.clear();
|
|
m_mapEnds.clear();
|
|
|
|
return ERROR_SUCCESS;
|
|
};
|
|
|
|
long CLongFileStagingFile::RemoveInstructionFromMap(
|
|
CStageInstruction* pRawInst)
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
CLongFileInstruction* pInst = (CLongFileInstruction*)pRawInst;
|
|
if(!pInst->IsWrite())
|
|
return ERROR_SUCCESS;
|
|
|
|
/*
|
|
ERRORTRACE((LOG_WBEMCORE, "Remove instruction\n"));
|
|
pInst->Dump();
|
|
*/
|
|
|
|
TIterator it = m_mapStarts.find(pInst->m_Location);
|
|
while(it != m_mapStarts.end() && it->second != pInst)
|
|
it++;
|
|
|
|
if(it == m_mapStarts.end())
|
|
{
|
|
return ERROR_FILE_NOT_FOUND;
|
|
}
|
|
|
|
it->second->Release();
|
|
m_mapStarts.erase(it);
|
|
|
|
CFileLocation Location;
|
|
((CWriteFileInstruction*)pInst)->GetEnd(&Location);
|
|
|
|
it = m_mapEnds.find(Location);
|
|
while(it != m_mapEnds.end() && it->second != pInst)
|
|
it++;
|
|
|
|
if(it == m_mapEnds.end())
|
|
{
|
|
return ERROR_FILE_NOT_FOUND;
|
|
}
|
|
|
|
it->second->Release();
|
|
m_mapEnds.erase(it);
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
void CLongFileStagingFile::FlushDataFiles()
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
for(int i = 0; i < A51_MAX_FILES; i++)
|
|
{
|
|
HANDLE h = m_aFiles[i].m_h;
|
|
if(h)
|
|
{
|
|
FlushFileBuffers(h);
|
|
}
|
|
}
|
|
|
|
}
|
|
long CLongFileStagingFile::WriteFile(int nFileId, DWORD dwStartOffset,
|
|
BYTE* pBuffer, DWORD dwLen, DWORD* pdwWritten)
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
long lRes;
|
|
|
|
#ifdef DBG
|
|
if(InjectFailure())
|
|
{
|
|
ERRORTRACE((LOG_WBEMCORE, "FAIL: File %d, offset %d, len %d\n",
|
|
(int)nFileId, (int)dwStartOffset, (int)dwLen));
|
|
return ERROR_SECTOR_NOT_FOUND;
|
|
}
|
|
#endif
|
|
|
|
if(pdwWritten)
|
|
*pdwWritten = dwLen;
|
|
|
|
if(DoesSupportOverwrites(nFileId))
|
|
{
|
|
//
|
|
// For this file, it is considered efficient to look for another
|
|
// instruction within the same transaction. It is guaranteed that
|
|
// writes within this file never intersect!
|
|
//
|
|
|
|
CFileLocation StartLocation;
|
|
StartLocation.m_nFileId = nFileId;
|
|
StartLocation.m_lStartOffset = (TFileOffset)dwStartOffset;
|
|
|
|
CWriteFileInstruction* pLatestMatch = NULL;
|
|
|
|
TIterator itStart = m_mapStarts.lower_bound(StartLocation);
|
|
while(itStart != m_mapStarts.end()
|
|
&& itStart->first.m_nFileId == nFileId
|
|
&& itStart->first.m_lStartOffset == (TFileOffset)dwStartOffset)
|
|
{
|
|
CWriteFileInstruction* pInst = itStart->second;
|
|
if(pInst->m_dwLen == dwLen && !pInst->IsCommitted())
|
|
{
|
|
//
|
|
// Exact match. Compare to the other matches
|
|
//
|
|
|
|
if(pLatestMatch == NULL ||
|
|
pInst->m_lZOrder > pLatestMatch->m_lZOrder)
|
|
{
|
|
pLatestMatch = pInst;
|
|
}
|
|
|
|
}
|
|
|
|
itStart++;
|
|
}
|
|
|
|
if(pLatestMatch)
|
|
{
|
|
//
|
|
// Exact match. All we need to do is overwrite the original
|
|
// instruction. Of course, we also need to afjust the hash!!
|
|
//
|
|
|
|
pLatestMatch->SetReuseFlag();
|
|
lRes = pLatestMatch->Write(pLatestMatch->ComputeOriginalOffset(),
|
|
pBuffer);
|
|
if(lRes)
|
|
return lRes;
|
|
|
|
/*
|
|
ERRORTRACE((LOG_WBEMCORE, "Replaced instruction:\n"));
|
|
pLatestMatch->Dump();
|
|
*/
|
|
|
|
//
|
|
// No need to make sure this instruction comes up in the Z-order!
|
|
// After all, it's already topmost by selection criteria!
|
|
//
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// No match --- add a new instruction
|
|
//
|
|
|
|
CWriteFileInstruction* pInst =
|
|
new CWriteFileInstruction(this, nFileId, dwStartOffset, dwLen);
|
|
if(pInst == NULL)
|
|
return ERROR_OUTOFMEMORY;
|
|
pInst->AddRef();
|
|
CTemplateReleaseMe<CLongFileInstruction> rm1(pInst);
|
|
|
|
DWORD dwSpaceNeeded = pInst->ComputeNeededSpace();
|
|
|
|
if(!CanWriteInTransaction(dwSpaceNeeded))
|
|
return ERROR_NOT_ENOUGH_QUOTA;
|
|
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
//
|
|
// Write all the data into the staging area
|
|
//
|
|
|
|
lRes = pInst->Write(m_lFirstFreeOffset, pBuffer);
|
|
if(lRes)
|
|
return lRes;
|
|
|
|
m_lFirstFreeOffset += dwSpaceNeeded - A51_TAIL_SIZE;
|
|
|
|
lRes = AddInstruction(pInst);
|
|
}
|
|
return lRes;
|
|
}
|
|
|
|
long CLongFileStagingFile::SetFileLength(int nFileId, DWORD dwLen)
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
long lRes;
|
|
|
|
|
|
CSetEndOfFileInstruction* pInst =
|
|
new CSetEndOfFileInstruction(this, nFileId, dwLen);
|
|
if(pInst == NULL)
|
|
return ERROR_OUTOFMEMORY;
|
|
pInst->AddRef();
|
|
CTemplateReleaseMe<CSetEndOfFileInstruction> rm1(pInst);
|
|
|
|
DWORD dwSpaceNeeded = pInst->ComputeNeededSpace();
|
|
|
|
if(!CanWriteInTransaction(dwSpaceNeeded))
|
|
return ERROR_NOT_ENOUGH_QUOTA;
|
|
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
//
|
|
// Write all the data into the staging area
|
|
//
|
|
|
|
lRes = pInst->Write(m_lFirstFreeOffset);
|
|
if(lRes)
|
|
return lRes;
|
|
|
|
//
|
|
// Write the new offset into the offset file
|
|
//
|
|
|
|
m_lFirstFreeOffset += dwSpaceNeeded - A51_TAIL_SIZE;
|
|
|
|
lRes = AddInstruction(pInst);
|
|
}
|
|
return lRes;
|
|
}
|
|
|
|
long CLongFileStagingFile::AddInstructionToMap(CStageInstruction* pRawInst,
|
|
CStageInstruction** ppUndoInst)
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
if(ppUndoInst)
|
|
*ppUndoInst = NULL;
|
|
|
|
CLongFileInstruction* pLongInst = (CLongFileInstruction*)pRawInst;
|
|
if(!pLongInst->IsWrite())
|
|
return ERROR_SUCCESS;
|
|
|
|
CWriteFileInstruction* pInst = (CWriteFileInstruction*)pLongInst;
|
|
|
|
/*
|
|
ERRORTRACE((LOG_WBEMCORE, "Add instruction\n"));
|
|
pInst->Dump();
|
|
*/
|
|
|
|
pInst->AddRef();
|
|
TIterator itStart;
|
|
|
|
try
|
|
{
|
|
itStart = m_mapStarts.insert(TValue(pInst->m_Location, pInst));
|
|
}
|
|
catch(...)
|
|
{
|
|
//
|
|
// Put everything back as well as we can
|
|
//
|
|
|
|
pInst->Release();
|
|
return ERROR_OUTOFMEMORY;
|
|
}
|
|
|
|
pInst->AddRef();
|
|
|
|
try
|
|
{
|
|
CFileLocation Location;
|
|
pInst->GetEnd(&Location);
|
|
|
|
m_mapEnds.insert(TValue(Location, pInst));
|
|
}
|
|
catch(...)
|
|
{
|
|
//
|
|
// Put everything back as well as we can
|
|
//
|
|
|
|
pInst->Release();
|
|
|
|
m_mapStarts.erase(itStart);
|
|
|
|
pInst->Release();
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
bool CLongFileStagingFile::IsStillCurrent(CStageInstruction* pRawInst)
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
CLongFileInstruction* pInst = (CLongFileInstruction*)pRawInst;
|
|
if(!pInst->IsWrite())
|
|
return true;
|
|
|
|
_ASSERT(m_mapStarts.find(pInst->m_Location) != m_mapStarts.end(),
|
|
L"Why would we be asking about an instruction that is "
|
|
"not even there?");
|
|
return true;
|
|
}
|
|
|
|
long CLongFileStagingFile::ReadFile(int nFileId, DWORD dwStartOffset,
|
|
BYTE* pBuffer, DWORD dwLen, DWORD* pdwRead)
|
|
{
|
|
if(pdwRead)
|
|
*pdwRead = dwLen;
|
|
long lRes;
|
|
|
|
CInCritSec ics(&m_cs);
|
|
|
|
//
|
|
// Search for the file
|
|
//
|
|
|
|
CFileLocation StartLocation;
|
|
StartLocation.m_nFileId = nFileId;
|
|
StartLocation.m_lStartOffset = (TFileOffset)dwStartOffset;
|
|
|
|
bool bComplete = false;
|
|
CRefedPointerArray<CWriteFileInstruction> apRelevant;
|
|
|
|
TIterator itStart = m_mapStarts.lower_bound(StartLocation);
|
|
while(itStart != m_mapStarts.end()
|
|
&& itStart->first.m_nFileId == nFileId
|
|
&& itStart->first.m_lStartOffset <
|
|
(TFileOffset)dwStartOffset + dwLen)
|
|
{
|
|
CWriteFileInstruction* pInst = itStart->second;
|
|
|
|
if(pInst->m_Location.m_lStartOffset == dwStartOffset &&
|
|
pInst->m_dwLen >= dwLen)
|
|
{
|
|
bComplete = true;
|
|
}
|
|
apRelevant.Add(pInst);
|
|
itStart++;
|
|
}
|
|
|
|
TIterator itEnd = m_mapEnds.lower_bound(StartLocation);
|
|
|
|
while(itEnd != m_mapEnds.end()
|
|
&& itEnd->first.m_nFileId == nFileId
|
|
&& itEnd->second->m_Location.m_lStartOffset <
|
|
(TFileOffset)dwStartOffset)
|
|
{
|
|
CWriteFileInstruction* pInst = itEnd->second;
|
|
if(itEnd->first.m_lStartOffset >=
|
|
(TFileOffset)dwStartOffset + dwLen - 1)
|
|
{
|
|
//
|
|
// Completely covers us!
|
|
//
|
|
|
|
bComplete = true;
|
|
}
|
|
|
|
apRelevant.Add(pInst);
|
|
itEnd++;
|
|
}
|
|
|
|
if(!bComplete)
|
|
{
|
|
//
|
|
// Read from the real file
|
|
//
|
|
|
|
lRes = A51ReadFromFileSync(m_aFiles[nFileId].m_h, dwStartOffset,
|
|
pBuffer, dwLen);
|
|
if(lRes != ERROR_SUCCESS)
|
|
{
|
|
return lRes;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Now, sort all the instructions by z-order
|
|
//
|
|
|
|
int i = 0;
|
|
while(i < apRelevant.GetSize() - 1)
|
|
{
|
|
CWriteFileInstruction* pInst1 = apRelevant[i];
|
|
CWriteFileInstruction* pInst2 = apRelevant[i+1];
|
|
if(pInst1->m_lZOrder > pInst2->m_lZOrder)
|
|
{
|
|
apRelevant.Swap(i, i+1);
|
|
if(i > 0)
|
|
i--;
|
|
}
|
|
else
|
|
{
|
|
i++;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Apply them in this order
|
|
//
|
|
|
|
/*
|
|
if(apRelevant.GetSize() > 0)
|
|
{
|
|
ERRORTRACE((LOG_WBEMCORE, "Using instructions to read %d bytes "
|
|
"from file %d starting at %d:\n",
|
|
(int)dwStartOffset, (int)nFileId, (int)dwLen));
|
|
}
|
|
*/
|
|
|
|
for(i = 0; i < apRelevant.GetSize(); i++)
|
|
{
|
|
CWriteFileInstruction* pInstruction = apRelevant[i];
|
|
// pInstruction->Dump();
|
|
|
|
long lIntersectionStart = max(pInstruction->m_Location.m_lStartOffset,
|
|
dwStartOffset);
|
|
|
|
long lIntersectionEnd =
|
|
min(pInstruction->m_Location.m_lStartOffset + pInstruction->m_dwLen,
|
|
dwStartOffset + dwLen);
|
|
|
|
DWORD dwReadLen = (DWORD)(lIntersectionEnd - lIntersectionStart);
|
|
long lInstructionReadOffset =
|
|
lIntersectionStart - pInstruction->m_Location.m_lStartOffset;
|
|
|
|
long lDestinationBufferOffset = lIntersectionStart - dwStartOffset;
|
|
|
|
long lRes = pInstruction->GetData(m_hFile, lInstructionReadOffset,
|
|
dwReadLen, pBuffer + lDestinationBufferOffset);
|
|
if(lRes != ERROR_SUCCESS)
|
|
{
|
|
return lRes;
|
|
}
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
long CLongFileStagingFile::GetFileLength(int nFileId, DWORD* pdwLength)
|
|
{
|
|
_ASSERT(pdwLength, L"Invalid parameter");
|
|
|
|
*pdwLength = 0;
|
|
long lRes;
|
|
|
|
CInCritSec ics(&m_cs);
|
|
|
|
//
|
|
// Find the instruction that ends as far as we can see --- that would be
|
|
// the last one in the map of Ends
|
|
//
|
|
|
|
|
|
CFileLocation Location;
|
|
Location.m_nFileId = nFileId+1;
|
|
Location.m_lStartOffset = 0;
|
|
|
|
TIterator itEnd = m_mapEnds.lower_bound(Location);
|
|
if(itEnd != m_mapEnds.begin())
|
|
{
|
|
itEnd--;
|
|
if(itEnd->first.m_nFileId == nFileId)
|
|
{
|
|
*pdwLength = itEnd->first.m_lStartOffset+1;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Now, check out the length of the actual file
|
|
//
|
|
|
|
BY_HANDLE_FILE_INFORMATION fi;
|
|
if(!GetFileInformationByHandle(m_aFiles[nFileId].m_h, &fi))
|
|
{
|
|
long lRes = GetLastError();
|
|
_ASSERT(lRes != ERROR_SUCCESS, L"Success from failure");
|
|
return lRes;
|
|
}
|
|
|
|
_ASSERT(fi.nFileSizeHigh == 0, L"Free file too long");
|
|
|
|
if(fi.nFileSizeLow > *pdwLength)
|
|
*pdwLength = fi.nFileSizeLow;
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
long CLongFileStagingFile::ConstructInstructionFromType(int nType,
|
|
CStageInstruction** ppInst)
|
|
{
|
|
CLongFileInstruction* pInst = NULL;
|
|
switch(nType)
|
|
{
|
|
case A51_INSTRUCTION_TYPE_WRITEFILE:
|
|
pInst = new CWriteFileInstruction(this);
|
|
break;
|
|
case A51_INSTRUCTION_TYPE_SETENDOFFILE:
|
|
pInst = new CSetEndOfFileInstruction(this);
|
|
break;
|
|
default:
|
|
return ERROR_RXACT_INVALID_STATE;
|
|
}
|
|
|
|
if(pInst == NULL)
|
|
return WBEM_E_OUT_OF_MEMORY;
|
|
pInst->AddRef();
|
|
*ppInst = pInst;
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
long CLongFileStagingFile::WriteToActualFile(int nFileId,
|
|
TFileOffset lFileOffset, BYTE* pBuffer, DWORD dwLen)
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
long lRet = A51WriteToFileSync(m_aFiles[nFileId].m_h, lFileOffset,
|
|
pBuffer, dwLen);
|
|
// FlushFileBuffers(m_aFiles[nFileId].m_h);
|
|
return lRet;
|
|
}
|
|
|
|
long CLongFileStagingFile::SetEndOfActualFile(int nFileId,
|
|
TFileOffset lFileLength)
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
LARGE_INTEGER liEnd;
|
|
liEnd.QuadPart = lFileLength;
|
|
|
|
if(!SetFilePointerEx(m_aFiles[nFileId].m_h, liEnd, NULL, FILE_BEGIN))
|
|
return GetLastError();
|
|
|
|
if(!SetEndOfFile(m_aFiles[nFileId].m_h))
|
|
return GetLastError();
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
long CLongFileStagingFile::CloseAllFiles()
|
|
{
|
|
CInCritSec ics(&m_cs);
|
|
|
|
for(int i = 0; i < A51_MAX_FILES; i++)
|
|
{
|
|
if(m_aFiles[i].m_h != NULL)
|
|
{
|
|
CloseHandle(m_aFiles[i].m_h);
|
|
}
|
|
m_aFiles[i].m_h = NULL;
|
|
m_aFiles[i].m_bSupportsOverwrites = false;
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
long CLongFileStagingFile::RegisterFile(int nFileId, HANDLE hFile,
|
|
bool bSupportsOverwrites)
|
|
{
|
|
_ASSERT(nFileId < A51_MAX_FILES, L"File ID is too large");
|
|
|
|
if(m_aFiles[nFileId].m_h != NULL)
|
|
CloseHandle(m_aFiles[nFileId].m_h);
|
|
|
|
m_aFiles[nFileId].m_h = hFile;
|
|
m_aFiles[nFileId].m_bSupportsOverwrites = bSupportsOverwrites;
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
bool CLongFileStagingFile::DoesSupportOverwrites(int nFileId)
|
|
{
|
|
return m_aFiles[nFileId].m_bSupportsOverwrites;
|
|
}
|
|
|
|
long CLongFileStagingFile::WriteEmpty()
|
|
{
|
|
_ASSERT(m_mapStarts.size() == 0 && m_mapEnds.size() == 0, L"");
|
|
FlushDataFiles();
|
|
return CExecutableStageManager::WriteEmpty();
|
|
}
|
|
|
|
|
|
bool CLongFileStagingFile::InjectFailure()
|
|
{
|
|
#ifdef A51_INJECT_FAILURE
|
|
if(GetTickCount() > g_dwLastFailureCheck + FAILURE_INJECTION_CHECK_INTERVAL)
|
|
{
|
|
HKEY hKey;
|
|
long lRes = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
|
|
L"SOFTWARE\\Microsoft\\WBEM\\CIMOM",
|
|
0, KEY_READ | KEY_WRITE, &hKey);
|
|
if(lRes)
|
|
return false;
|
|
CRegCloseMe cm(hKey);
|
|
|
|
DWORD dwLen = sizeof(DWORD);
|
|
lRes = RegQueryValueExW(hKey, L"Failure Frequency", NULL, NULL,
|
|
(LPBYTE)&g_dwFailureFrequency, &dwLen);
|
|
if(lRes != ERROR_SUCCESS)
|
|
g_dwFailureFrequency = 0;
|
|
|
|
g_dwLastFailureCheck = GetTickCount();
|
|
}
|
|
|
|
if(g_dwFailureFrequency && ++g_dwFailureCount == g_dwFailureFrequency)
|
|
{
|
|
g_dwFailureCount = 0;
|
|
m_bMustFail = true;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
void CLongFileStagingFile::Dump(FILE* f)
|
|
{
|
|
fprintf(f, "BEGINS:\n");
|
|
|
|
TIterator itStart = m_mapStarts.begin();
|
|
while(itStart != m_mapStarts.end())
|
|
{
|
|
CWriteFileInstruction* pInst = itStart->second;
|
|
fprintf(f, "File %d (%d-%d): instruction %p\n",
|
|
(int)pInst->m_Location.m_nFileId,
|
|
(int)pInst->m_Location.m_lStartOffset,
|
|
(int)pInst->m_Location.m_lStartOffset + pInst->m_dwLen,
|
|
pInst);
|
|
itStart++;
|
|
}
|
|
|
|
fprintf(f, "IN ORDER:\n");
|
|
|
|
int nSize = m_qToWrite.size();
|
|
for(int i = 0; i < nSize; i++)
|
|
{
|
|
CLongFileInstruction* pInstruction =
|
|
(CLongFileInstruction*)m_qToWrite.front();
|
|
if(pInstruction->IsWrite())
|
|
{
|
|
CWriteFileInstruction* pInst = (CWriteFileInstruction*)pInstruction;
|
|
fprintf(f, "File %d (%d-%d): instruction %p\n",
|
|
(int)pInst->m_Location.m_nFileId,
|
|
(int)pInst->m_Location.m_lStartOffset,
|
|
(int)pInst->m_Location.m_lStartOffset + pInst->m_dwLen,
|
|
pInst);
|
|
}
|
|
else
|
|
{
|
|
CSetEndOfFileInstruction* pInst = (CSetEndOfFileInstruction*)pInstruction;
|
|
fprintf(f, "Truncate file %d at %d: instruction %p\n",
|
|
(int)pInst->m_Location.m_nFileId,
|
|
(int)pInst->m_Location.m_lStartOffset,
|
|
pInst);
|
|
}
|
|
|
|
m_qToWrite.pop_front();
|
|
m_qToWrite.push_back(pInstruction);
|
|
}
|
|
}
|