更正VSS备份流- VSS_E_BAD_STATE错误

Question

我在VSS和C++中备份作业时遇到了问题。它现在正处于工作和备份文件的阶段，但是当我使用结果VSS_E_BAD_STATE调用BackupComplete()时，它会失败，所以我希望任何熟悉VSS_E_BAD_STATE的人都能提供一些关于我的流程是否正确的输入。我目前正在做以下工作：

if( !CHECK_HRESULT(::CreateVssBackupComponents(&m_pBackupComponents))  )
{
    throw;
}

if( !CHECK_HRESULT((hr = m_pBackupComponents->InitializeForBackup())) )
{
    throw;
}

WCHAR wszVolumePathName[MAX_PATH];
GUID snapshotId;
BOOL supported = TRUE;
HRESULT hr;
SnapshotMap::iterator it;
BOOL bWorked = ::GetVolumePathName(path.c_str(), wszVolumePathName, MAX_PATH); 

if( !bWorked )
{
    throw;
}

if( !CHECK_HRESULT((hr = m_pBackupComponents->IsVolumeSupported(GUID_NULL, wszVolumePathName, &supported))) || !supported )
{
    throw;
}

GUID snapshotSetId;
if( !CHECK_HRESULT((hr = m_pBackupComponents->StartSnapshotSet(&snapshotSetId))) )
{
    throw;
}

m_SnapshotIdList.push_back(snapshotId);

if( !CHECK_HRESULT((hr = m_pBackupComponents->AddToSnapshotSet(wszVolumePathName, GUID_NULL, &snapshotId))) )
{
    throw;
}

if( !CHECK_HRESULT((hr = m_pBackupComponents->SetBackupState(FALSE, FALSE, VSS_BT_COPY, FALSE))) )
{
    throw;
}

CComPtr<IVssAsync> pPrepareForBackupResults; 
if( !CHECK_HRESULT((hr = m_pBackupComponents->PrepareForBackup(&pPrepareForBackupResults))) )
{
    throw;
}

if( !CHECK_HRESULT((hr = pPrepareForBackupResults->Wait())) )
{
    pPrepareForBackupResults.Release();
    throw;
}

HRESULT hrPrepareForBackupResults; 
if( !CHECK_HRESULT((hr = pPrepareForBackupResults->QueryStatus(&hrPrepareForBackupResults, NULL))) )
{
    pPrepareForBackupResults.Release();
    throw;
}

pPrepareForBackupResults.Release();
if( hrPrepareForBackupResults != VSS_S_ASYNC_FINISHED )
{
    throw;
}

CComPtr<IVssAsync> pDoSnapshotSetResults;
if( !CHECK_HRESULT((hr = m_pBackupComponents->DoSnapshotSet(&pDoSnapshotSetResults))) )
{
    throw;
}

m_VssSyncList.push_back(pDoSnapshotSetResults);

VSS_SNAPSHOT_PROP snapshotProperties;
if( !CHECK_HRESULT((hr = m_pBackupComponents->GetSnapshotProperties(snapshotId, &snapshotProperties))) )
{
    throw;
}

TSTRING newPath(snapshotProperties.m_pwszSnapshotDeviceObject);
m_SnapshotMap.insert(SnapshotMap_Entry(TSTRING(wszVolumePathName), newPath));
newPath.append(path.substr(2));

<Backup files here>

::VssFreeSnapshotProperties(&snapshotProperties);

for( SnapshotIdList::iterator it = m_SnapshotIdList.begin(); it != m_SnapshotIdList.end(); it++ )
{
    LONG cDeletedSnapshots; 
    GUID nonDeletedSnapshotId;
    m_pBackupComponents->DeleteSnapshots(*it, VSS_OBJECT_SNAPSHOT_SET, TRUE, &cDeletedSnapshots, &nonDeletedSnapshotId); 
}

m_SnapshotIdList.clear();

for( VssSyncList::iterator it = m_VssSyncList.begin(); it != m_VssSyncList.end(); it++ )
{
    (*it).Release();
}

m_VssSyncList.clear();

CComPtr<IVssAsync> pBackupCompleteResults;
if( !CHECK_HRESULT((hr = m_pBackupComponents->BackupComplete(&pBackupCompleteResults))) )
{
    throw;
}
else
{
    if( !CHECK_HRESULT((hr = pBackupCompleteResults->Wait())) )
    {
        throw;
    }

    HRESULT hrBackupCompleteResults; 
    if( CHECK_HRESULT(pBackupCompleteResults->QueryStatus(&hrBackupCompleteResults, NULL)) )
    {
        if( hrBackupCompleteResults != VSS_S_ASYNC_FINISHED )
        {
            throw;
        }
    }

    pBackupCompleteResults.Release();
}

m_SnapshotMap.clear();

似乎我调用的内容顺序错误，但查看文档和各种来源时，我找不到顺序错误的内容。

我有什么明显的遗漏吗？

Answer 1

在处理完每个组件之后，在调用BackupComplete之前，是否调用SetBackupSucceeded？

Answer 2

我在学习VSS时遇到过这个错误，主要是因为用CoInitialize()调用了VSS序列。请检查VSS序列前后是否有CoInitialize和CoUninitialize。