/* Unregister this VSS hardware provider from the system */
STDAPI DllUnregisterServer(void)
{
TCHAR key[256];
COMInitializer initializer;
COMPointer<IVssAdmin> pVssAdmin;
HRESULT hr = CoCreateInstance(CLSID_VSSCoordinator,
NULL, CLSCTX_ALL, IID_IVssAdmin,
(void **)pVssAdmin.replace());
if (SUCCEEDED(hr)) {
hr = pVssAdmin->UnregisterProvider(g_gProviderId);
} else {
errmsg(hr, "CoCreateInstance(VSSCoordinator) failed");
}
sprintf(key, "CLSID\\%s", g_szClsid);
SHDeleteKey(HKEY_CLASSES_ROOT, key);
SHDeleteKey(HKEY_CLASSES_ROOT, g_szProgid);
return S_OK; /* Uninstall should never fail */
}
STDAPI StopService(void)
{
HRESULT hr;
COMInitializer initializer;
COMPointer<IUnknown> pUnknown;
COMPointer<ICOMAdminCatalog2> pCatalog;
int count = 0;
chk(QGAProviderFind(QGAProviderCount, (void *)&count));
if (count) {
chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,
IID_IUnknown, (void **)pUnknown.replace()));
chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2,
(void **)pCatalog.replace()));
chk(pCatalog->ShutdownApplication(_bstr_t(QGA_PROVIDER_LNAME)));
}
out:
return hr;
}
void requester_thaw(int *num_vols, void *mountpints, ErrorSet *errset)
{
COMPointer<IVssAsync> pAsync;
if (!vss_ctx.hEventThaw) {
/*
* In this case, DoSnapshotSet is aborted or not started,
* and no volumes must be frozen. We return without an error.
*/
*num_vols = 0;
return;
}
/* Tell the provider that the snapshot is finished. */
SetEvent(vss_ctx.hEventThaw);
assert(vss_ctx.pVssbc);
assert(vss_ctx.pAsyncSnapshot);
HRESULT hr = WaitForAsync(vss_ctx.pAsyncSnapshot);
switch (hr) {
case VSS_S_ASYNC_FINISHED:
hr = vss_ctx.pVssbc->BackupComplete(pAsync.replace());
if (SUCCEEDED(hr)) {
hr = WaitForAsync(pAsync);
}
if (FAILED(hr)) {
err_set(errset, hr, "failed to complete backup");
}
break;
case (HRESULT)VSS_E_OBJECT_NOT_FOUND:
/*
* On Windows earlier than 2008 SP2 which does not support
* VSS_VOLSNAP_ATTR_NO_AUTORECOVERY context, the final commit is not
* skipped and VSS is aborted by VSS_E_OBJECT_NOT_FOUND. However, as
* the system had been frozen until fsfreeze-thaw command was issued,
* we ignore this error.
*/
vss_ctx.pVssbc->AbortBackup();
break;
case VSS_E_UNEXPECTED_PROVIDER_ERROR:
if (WaitForSingleObject(vss_ctx.hEventTimeout, 0) != WAIT_OBJECT_0) {
err_set(errset, hr, "unexpected error in VSS provider");
break;
}
/* fall through if hEventTimeout is signaled */
case (HRESULT)VSS_E_HOLD_WRITES_TIMEOUT:
err_set(errset, hr, "couldn't hold writes: "
"fsfreeze is limited up to 10 seconds");
break;
default:
err_set(errset, hr, "failed to do snapshot set");
}
if (err_is_set(errset)) {
vss_ctx.pVssbc->AbortBackup();
}
*num_vols = vss_ctx.cFrozenVols;
requester_cleanup();
CoUninitialize();
StopService();
}
void requester_freeze(int *num_vols, void *mountpoints, ErrorSet *errset)
{
COMPointer<IVssAsync> pAsync;
HANDLE volume;
HRESULT hr;
LONG ctx;
GUID guidSnapshotSet = GUID_NULL;
SECURITY_DESCRIPTOR sd;
SECURITY_ATTRIBUTES sa;
WCHAR short_volume_name[64], *display_name = short_volume_name;
DWORD wait_status;
int num_fixed_drives = 0, i;
int num_mount_points = 0;
if (vss_ctx.pVssbc) { /* already frozen */
*num_vols = 0;
return;
}
CoInitialize(NULL);
/* Allow unrestricted access to events */
InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl(&sd, TRUE, NULL, FALSE);
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = &sd;
sa.bInheritHandle = FALSE;
vss_ctx.hEventFrozen = CreateEvent(&sa, TRUE, FALSE, EVENT_NAME_FROZEN);
if (!vss_ctx.hEventFrozen) {
err_set(errset, GetLastError(), "failed to create event %s",
EVENT_NAME_FROZEN);
goto out;
}
vss_ctx.hEventThaw = CreateEvent(&sa, TRUE, FALSE, EVENT_NAME_THAW);
if (!vss_ctx.hEventThaw) {
err_set(errset, GetLastError(), "failed to create event %s",
EVENT_NAME_THAW);
goto out;
}
vss_ctx.hEventTimeout = CreateEvent(&sa, TRUE, FALSE, EVENT_NAME_TIMEOUT);
if (!vss_ctx.hEventTimeout) {
err_set(errset, GetLastError(), "failed to create event %s",
EVENT_NAME_TIMEOUT);
goto out;
}
assert(pCreateVssBackupComponents != NULL);
hr = pCreateVssBackupComponents(&vss_ctx.pVssbc);
if (FAILED(hr)) {
err_set(errset, hr, "failed to create VSS backup components");
goto out;
}
hr = vss_ctx.pVssbc->InitializeForBackup();
if (FAILED(hr)) {
err_set(errset, hr, "failed to initialize for backup");
goto out;
}
hr = vss_ctx.pVssbc->SetBackupState(true, true, VSS_BT_FULL, false);
if (FAILED(hr)) {
err_set(errset, hr, "failed to set backup state");
goto out;
}
/*
* Currently writable snapshots are not supported.
* To prevent the final commit (which requires to write to snapshots),
* ATTR_NO_AUTORECOVERY and ATTR_TRANSPORTABLE are specified here.
*/
ctx = VSS_CTX_APP_ROLLBACK | VSS_VOLSNAP_ATTR_TRANSPORTABLE |
VSS_VOLSNAP_ATTR_NO_AUTORECOVERY | VSS_VOLSNAP_ATTR_TXF_RECOVERY;
hr = vss_ctx.pVssbc->SetContext(ctx);
if (hr == (HRESULT)VSS_E_UNSUPPORTED_CONTEXT) {
/* Non-server version of Windows doesn't support ATTR_TRANSPORTABLE */
ctx &= ~VSS_VOLSNAP_ATTR_TRANSPORTABLE;
hr = vss_ctx.pVssbc->SetContext(ctx);
}
if (FAILED(hr)) {
err_set(errset, hr, "failed to set backup context");
goto out;
}
hr = vss_ctx.pVssbc->GatherWriterMetadata(pAsync.replace());
if (SUCCEEDED(hr)) {
hr = WaitForAsync(pAsync);
}
if (FAILED(hr)) {
err_set(errset, hr, "failed to gather writer metadata");
goto out;
}
AddComponents(errset);
if (err_is_set(errset)) {
goto out;
}
hr = vss_ctx.pVssbc->StartSnapshotSet(&guidSnapshotSet);
if (FAILED(hr)) {
err_set(errset, hr, "failed to start snapshot set");
goto out;
}
if (mountpoints) {
PWCHAR volume_name_wchar;
for (volList *list = (volList *)mountpoints; list; list = list->next) {
size_t len = strlen(list->value) + 1;
size_t converted = 0;
VSS_ID pid;
volume_name_wchar = new wchar_t[len];
mbstowcs_s(&converted, volume_name_wchar, len,
list->value, _TRUNCATE);
hr = vss_ctx.pVssbc->AddToSnapshotSet(volume_name_wchar,
g_gProviderId, &pid);
if (FAILED(hr)) {
err_set(errset, hr, "failed to add %S to snapshot set",
volume_name_wchar);
delete volume_name_wchar;
goto out;
}
num_mount_points++;
delete volume_name_wchar;
}
if (num_mount_points == 0) {
/* If there is no valid mount points, just exit. */
goto out;
}
}
if (!mountpoints) {
volume = FindFirstVolumeW(short_volume_name, sizeof(short_volume_name));
if (volume == INVALID_HANDLE_VALUE) {
err_set(errset, hr, "failed to find first volume");
goto out;
}
for (;;) {
if (GetDriveTypeW(short_volume_name) == DRIVE_FIXED) {
VSS_ID pid;
hr = vss_ctx.pVssbc->AddToSnapshotSet(short_volume_name,
g_gProviderId, &pid);
if (FAILED(hr)) {
WCHAR volume_path_name[PATH_MAX];
if (GetVolumePathNamesForVolumeNameW(
short_volume_name, volume_path_name,
sizeof(volume_path_name), NULL) &&
*volume_path_name) {
display_name = volume_path_name;
}
err_set(errset, hr, "failed to add %S to snapshot set",
display_name);
FindVolumeClose(volume);
goto out;
}
num_fixed_drives++;
}
if (!FindNextVolumeW(volume, short_volume_name,
sizeof(short_volume_name))) {
FindVolumeClose(volume);
break;
}
}
if (num_fixed_drives == 0) {
goto out; /* If there is no fixed drive, just exit. */
}
}
hr = vss_ctx.pVssbc->PrepareForBackup(pAsync.replace());
if (SUCCEEDED(hr)) {
hr = WaitForAsync(pAsync);
}
if (FAILED(hr)) {
err_set(errset, hr, "failed to prepare for backup");
goto out;
}
hr = vss_ctx.pVssbc->GatherWriterStatus(pAsync.replace());
if (SUCCEEDED(hr)) {
hr = WaitForAsync(pAsync);
}
if (FAILED(hr)) {
err_set(errset, hr, "failed to gather writer status");
goto out;
}
/*
* Start VSS quiescing operations.
* CQGAVssProvider::CommitSnapshots will kick vss_ctx.hEventFrozen
* after the applications and filesystems are frozen.
*/
hr = vss_ctx.pVssbc->DoSnapshotSet(&vss_ctx.pAsyncSnapshot);
if (FAILED(hr)) {
err_set(errset, hr, "failed to do snapshot set");
goto out;
}
/* Need to call QueryStatus several times to make VSS provider progress */
for (i = 0; i < VSS_TIMEOUT_FREEZE_MSEC/VSS_TIMEOUT_EVENT_MSEC; i++) {
HRESULT hr2 = vss_ctx.pAsyncSnapshot->QueryStatus(&hr, NULL);
if (FAILED(hr2)) {
err_set(errset, hr, "failed to do snapshot set");
goto out;
}
if (hr != VSS_S_ASYNC_PENDING) {
err_set(errset, E_FAIL,
"DoSnapshotSet exited without Frozen event");
goto out;
}
wait_status = WaitForSingleObject(vss_ctx.hEventFrozen,
VSS_TIMEOUT_EVENT_MSEC);
if (wait_status != WAIT_TIMEOUT) {
break;
}
}
if (wait_status == WAIT_TIMEOUT) {
err_set(errset, E_FAIL,
"timeout when try to receive Frozen event from VSS provider");
/* If we are here, VSS had timeout.
* Don't call AbortBackup, just return directly.
*/
goto out1;
}
if (wait_status != WAIT_OBJECT_0) {
err_set(errset, E_FAIL,
"couldn't receive Frozen event from VSS provider");
goto out;
}
if (mountpoints) {
*num_vols = vss_ctx.cFrozenVols = num_mount_points;
} else {
*num_vols = vss_ctx.cFrozenVols = num_fixed_drives;
}
return;
out:
if (vss_ctx.pVssbc) {
vss_ctx.pVssbc->AbortBackup();
}
out1:
requester_cleanup();
CoUninitialize();
}
static void AddComponents(ErrorSet *errset)
{
unsigned int cWriters, i;
VSS_ID id, idInstance, idWriter;
BSTR bstrWriterName = NULL;
VSS_USAGE_TYPE usage;
VSS_SOURCE_TYPE source;
unsigned int cComponents, c1, c2, j;
COMPointer<IVssExamineWriterMetadata> pMetadata;
COMPointer<IVssWMComponent> pComponent;
PVSSCOMPONENTINFO info;
HRESULT hr;
hr = vss_ctx.pVssbc->GetWriterMetadataCount(&cWriters);
if (FAILED(hr)) {
err_set(errset, hr, "failed to get writer metadata count");
goto out;
}
for (i = 0; i < cWriters; i++) {
hr = vss_ctx.pVssbc->GetWriterMetadata(i, &id, pMetadata.replace());
if (FAILED(hr)) {
err_set(errset, hr, "failed to get writer metadata of %d/%d",
i, cWriters);
goto out;
}
hr = pMetadata->GetIdentity(&idInstance, &idWriter,
&bstrWriterName, &usage, &source);
if (FAILED(hr)) {
err_set(errset, hr, "failed to get identity of writer %d/%d",
i, cWriters);
goto out;
}
hr = pMetadata->GetFileCounts(&c1, &c2, &cComponents);
if (FAILED(hr)) {
err_set(errset, hr, "failed to get file counts of %S",
bstrWriterName);
goto out;
}
for (j = 0; j < cComponents; j++) {
hr = pMetadata->GetComponent(j, pComponent.replace());
if (FAILED(hr)) {
err_set(errset, hr,
"failed to get component %d/%d of %S",
j, cComponents, bstrWriterName);
goto out;
}
hr = pComponent->GetComponentInfo(&info);
if (FAILED(hr)) {
err_set(errset, hr,
"failed to get component info %d/%d of %S",
j, cComponents, bstrWriterName);
goto out;
}
if (info->bSelectable) {
hr = vss_ctx.pVssbc->AddComponent(idInstance, idWriter,
info->type,
info->bstrLogicalPath,
info->bstrComponentName);
if (FAILED(hr)) {
err_set(errset, hr, "failed to add component %S(%S)",
info->bstrComponentName, bstrWriterName);
goto out;
}
}
SysFreeString(bstrWriterName);
bstrWriterName = NULL;
pComponent->FreeComponentInfo(info);
info = NULL;
}
}
out:
if (bstrWriterName) {
SysFreeString(bstrWriterName);
}
if (pComponent && info) {
pComponent->FreeComponentInfo(info);
}
}
/* Lookup Administrators group name from winmgmt */
static HRESULT GetAdminName(_bstr_t *name)
{
HRESULT hr;
COMPointer<IWbemLocator> pLoc;
COMPointer<IWbemServices> pSvc;
COMPointer<IEnumWbemClassObject> pEnum;
COMPointer<IWbemClassObject> pWobj;
ULONG returned;
_variant_t var;
chk(CoCreateInstance(CLSID_WbemLocator, NULL, CLSCTX_INPROC_SERVER,
IID_IWbemLocator, (LPVOID *)pLoc.replace()));
chk(pLoc->ConnectServer(_bstr_t(L"ROOT\\CIMV2"), NULL, NULL, NULL,
0, 0, 0, pSvc.replace()));
chk(CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE,
NULL, RPC_C_AUTHN_LEVEL_CALL,
RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE));
chk(pSvc->ExecQuery(_bstr_t(L"WQL"),
_bstr_t(L"select * from Win32_Account where "
"SID='S-1-5-32-544' and localAccount=TRUE"),
WBEM_FLAG_RETURN_IMMEDIATELY | WBEM_FLAG_FORWARD_ONLY,
NULL, pEnum.replace()));
if (!pEnum) {
hr = E_FAIL;
errmsg(hr, "Failed to query for Administrators");
goto out;
}
chk(pEnum->Next(WBEM_INFINITE, 1, pWobj.replace(), &returned));
if (returned == 0) {
hr = E_FAIL;
errmsg(hr, "No Administrators found");
goto out;
}
chk(pWobj->Get(_bstr_t(L"Name"), 0, &var, 0, 0));
try {
*name = var;
} catch(...) {
hr = E_FAIL;
errmsg(hr, "Failed to get name of Administrators");
goto out;
}
out:
return hr;
}
/* Register this dll as a VSS provider */
STDAPI DllRegisterServer(void)
{
COMInitializer initializer;
COMPointer<IVssAdmin> pVssAdmin;
HRESULT hr = E_FAIL;
char dllPath[MAX_PATH];
char key[256];
if (!g_hinstDll) {
errmsg_dialog(hr, "Module instance is not available");
goto out;
}
/* Add this module to registery */
sprintf(key, "CLSID\\%s", g_szClsid);
if (!CreateRegistryKey(key, NULL, g_szClsid)) {
goto out;
}
if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) {
errmsg_dialog(GetLastError(), "GetModuleFileName failed");
goto out;
}
sprintf(key, "CLSID\\%s\\InprocServer32", g_szClsid);
if (!CreateRegistryKey(key, NULL, dllPath)) {
goto out;
}
if (!CreateRegistryKey(key, "ThreadingModel", "Apartment")) {
goto out;
}
sprintf(key, "CLSID\\%s\\ProgID", g_szClsid);
if (!CreateRegistryKey(key, NULL, g_szProgid)) {
goto out;
}
if (!CreateRegistryKey(g_szProgid, NULL, QGA_PROVIDER_NAME)) {
goto out;
}
sprintf(key, "%s\\CLSID", g_szProgid);
if (!CreateRegistryKey(key, NULL, g_szClsid)) {
goto out;
}
hr = CoCreateInstance(CLSID_VSSCoordinator, NULL, CLSCTX_ALL,
IID_IVssAdmin, (void **)pVssAdmin.replace());
if (FAILED(hr)) {
errmsg_dialog(hr, "CoCreateInstance(VSSCoordinator) failed");
goto out;
}
hr = pVssAdmin->RegisterProvider(g_gProviderId, CLSID_QGAVSSProvider,
const_cast<WCHAR*>(QGA_PROVIDER_LNAME),
VSS_PROV_SOFTWARE,
const_cast<WCHAR*>(QGA_PROVIDER_VERSION),
g_gProviderVersion);
if (FAILED(hr)) {
errmsg_dialog(hr, "RegisterProvider failed");
}
out:
if (FAILED(hr)) {
DllUnregisterServer();
}
return hr;
}
/* Register this module to COM+ Applications Catalog */
STDAPI COMRegister(void)
{
HRESULT hr;
COMInitializer initializer;
COMPointer<IUnknown> pUnknown;
COMPointer<ICOMAdminCatalog2> pCatalog;
COMPointer<ICatalogCollection> pApps, pRoles, pUsersInRole;
COMPointer<ICatalogObject> pObj;
long n;
_bstr_t name;
_variant_t key;
CHAR dllPath[MAX_PATH], tlbPath[MAX_PATH];
bool unregisterOnFailure = false;
int count = 0;
DWORD bufferLen = BUFFER_SIZE;
wchar_t buffer[BUFFER_SIZE];
const wchar_t *administratorsGroupSID = L"S-1-5-32-544";
const wchar_t *systemUserSID = L"S-1-5-18";
if (!g_hinstDll) {
errmsg(E_FAIL, "Failed to initialize DLL");
return E_FAIL;
}
chk(QGAProviderFind(QGAProviderCount, (void *)&count));
if (count) {
errmsg(E_ABORT, "QGA VSS Provider is already installed");
return E_ABORT;
}
chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,
IID_IUnknown, (void **)pUnknown.replace()));
chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2,
(void **)pCatalog.replace()));
/* Install COM+ Component */
chk(pCatalog->GetCollection(_bstr_t(L"Applications"),
(IDispatch **)pApps.replace()));
chk(pApps->Populate());
chk(pApps->Add((IDispatch **)&pObj));
chk(put_Value(pObj, L"Name", QGA_PROVIDER_LNAME));
chk(put_Value(pObj, L"Description", QGA_PROVIDER_LNAME));
chk(put_Value(pObj, L"ApplicationAccessChecksEnabled", true));
chk(put_Value(pObj, L"Authentication", short(6)));
chk(put_Value(pObj, L"AuthenticationCapability", short(2)));
chk(put_Value(pObj, L"ImpersonationLevel", short(2)));
chk(pApps->SaveChanges(&n));
/* The app should be deleted if something fails after SaveChanges */
unregisterOnFailure = true;
chk(pObj->get_Key(&key));
if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) {
hr = HRESULT_FROM_WIN32(GetLastError());
errmsg(hr, "GetModuleFileName failed");
goto out;
}
n = strlen(dllPath);
if (n < 3) {
hr = E_FAIL;
errmsg(hr, "Failed to lookup dll");
goto out;
}
strcpy(tlbPath, dllPath);
strcpy(tlbPath+n-3, "tlb");
fprintf(stderr, "Registering " QGA_PROVIDER_NAME ":\n");
fprintf(stderr, " %s\n", dllPath);
fprintf(stderr, " %s\n", tlbPath);
if (!PathFileExists(tlbPath)) {
hr = HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
errmsg(hr, "Failed to lookup tlb");
goto out;
}
chk(pCatalog->CreateServiceForApplication(
_bstr_t(QGA_PROVIDER_LNAME), _bstr_t(QGA_PROVIDER_LNAME),
_bstr_t(L"SERVICE_DEMAND_START"), _bstr_t(L"SERVICE_ERROR_NORMAL"),
_bstr_t(L""), _bstr_t(L".\\localsystem"), _bstr_t(L""), FALSE));
chk(pCatalog->InstallComponent(_bstr_t(QGA_PROVIDER_LNAME),
_bstr_t(dllPath), _bstr_t(tlbPath),
_bstr_t("")));
/* Setup roles of the applicaion */
chk(getNameByStringSID(administratorsGroupSID, buffer, &bufferLen));
chk(pApps->GetCollection(_bstr_t(L"Roles"), key,
(IDispatch **)pRoles.replace()));
chk(pRoles->Populate());
chk(pRoles->Add((IDispatch **)pObj.replace()));
chk(put_Value(pObj, L"Name", buffer));
chk(put_Value(pObj, L"Description", L"Administrators group"));
chk(pRoles->SaveChanges(&n));
chk(pObj->get_Key(&key));
/* Setup users in the role */
chk(pRoles->GetCollection(_bstr_t(L"UsersInRole"), key,
(IDispatch **)pUsersInRole.replace()));
chk(pUsersInRole->Populate());
chk(pUsersInRole->Add((IDispatch **)pObj.replace()));
chk(GetAdminName(&name));
chk(put_Value(pObj, L"User", _bstr_t(".\\") + name));
bufferLen = BUFFER_SIZE;
chk(getNameByStringSID(systemUserSID, buffer, &bufferLen));
chk(pUsersInRole->Add((IDispatch **)pObj.replace()));
chk(put_Value(pObj, L"User", buffer));
chk(pUsersInRole->SaveChanges(&n));
out:
if (unregisterOnFailure && FAILED(hr)) {
COMUnregister();
}
return hr;
}
/* Find and iterate QGA VSS provider in COM+ Application Catalog */
static HRESULT QGAProviderFind(
HRESULT (*found)(ICatalogCollection *, int, void *), void *arg)
{
HRESULT hr;
COMInitializer initializer;
COMPointer<IUnknown> pUnknown;
COMPointer<ICOMAdminCatalog2> pCatalog;
COMPointer<ICatalogCollection> pColl;
COMPointer<ICatalogObject> pObj;
_variant_t var;
long i, n;
chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,
IID_IUnknown, (void **)pUnknown.replace()));
chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2,
(void **)pCatalog.replace()));
chk(pCatalog->GetCollection(_bstr_t(L"Applications"),
(IDispatch **)pColl.replace()));
chk(pColl->Populate());
chk(pColl->get_Count(&n));
for (i = n - 1; i >= 0; i--) {
chk(pColl->get_Item(i, (IDispatch **)pObj.replace()));
chk(pObj->get_Value(_bstr_t(L"Name"), &var));
if (var == _variant_t(QGA_PROVIDER_LNAME)) {
if (FAILED(found(pColl, i, arg))) {
goto out;
}
}
}
chk(pColl->SaveChanges(&n));
out:
return hr;
}
