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/*
* Ceph - scalable distributed file system
*
* Copyright (c) 2019 SUSE LLC
* Copyright (C) 2022 Cloudbase Solutions
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "wnbd_wmi.h"
#include "common/debug.h"
#include "common/win32/wstring.h"
#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "rbd-wnbd: "
// Initializes the COM library for use by the calling thread using
// COINIT_MULTITHREADED.
static HRESULT co_initialize_basic()
{
dout(10) << "initializing COM library" << dendl;
HRESULT hres = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hres)) {
derr << "CoInitializeEx failed. HRESULT: " << hres << dendl;
return hres;
}
// CoInitializeSecurity must be called once per process.
static bool com_security_flags_set = false;
if (!com_security_flags_set) {
hres = CoInitializeSecurity(
NULL, -1, NULL, NULL,
RPC_C_AUTHN_LEVEL_DEFAULT,
RPC_C_IMP_LEVEL_IMPERSONATE,
NULL,
EOAC_NONE,
NULL);
if (FAILED(hres)) {
derr << "CoInitializeSecurity failed. HRESULT: " << hres << dendl;
CoUninitialize();
return hres;
}
com_security_flags_set = true;
}
return 0;
}
// co_uninitialize must be called once for every successful
// co_initialize_basic call. Any WMI objects (including connections,
// event subscriptions, etc) must be released beforehand.
static void co_uninitialize()
{
dout(10) << "closing COM library" << dendl;
CoUninitialize();
}
HRESULT COMBootstrapper::initialize()
{
std::unique_lock l{init_lock};
HRESULT hres = co_initialize_basic();
if (!FAILED(hres)) {
initialized = true;
}
return hres;
}
void COMBootstrapper::cleanup()
{
if (initialized) {
co_uninitialize();
initialized = false;
}
}
void WmiConnection::close()
{
dout(20) << "closing wmi conn: " << this
<< ", svc: " << wbem_svc
<< ", loc: " << wbem_loc << dendl;
if (wbem_svc != NULL) {
wbem_svc->Release();
wbem_svc = NULL;
}
if (wbem_loc != NULL) {
wbem_loc->Release();
wbem_loc = NULL;
}
}
HRESULT WmiConnection::initialize()
{
HRESULT hres = CoCreateInstance(
CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER,
IID_IWbemLocator, (LPVOID*)&wbem_loc);
if (FAILED(hres)) {
derr << "CoCreateInstance failed. HRESULT: " << hres << dendl;
return hres;
}
hres = wbem_loc->ConnectServer(
_bstr_t(ns.c_str()).GetBSTR(), NULL, NULL, NULL,
WBEM_FLAG_CONNECT_USE_MAX_WAIT, NULL, NULL,
&wbem_svc);
if (FAILED(hres)) {
derr << "Could not connect to WMI service. HRESULT: " << hres << dendl;
return hres;
}
if (!wbem_svc) {
hres = MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32,
ERROR_INVALID_HANDLE);
derr << "WMI connection failed, no WMI service object received." << dendl;
return hres;
}
hres = CoSetProxyBlanket(
wbem_svc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL,
RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE);
if (FAILED(hres)) {
derr << "CoSetProxyBlanket failed. HRESULT:" << hres << dendl;
}
return hres;
}
HRESULT get_property_str(
IWbemClassObject* cls_obj,
const std::wstring& property,
std::wstring& value)
{
VARIANT vt_prop;
VariantInit(&vt_prop);
HRESULT hres = cls_obj->Get(property.c_str(), 0, &vt_prop, 0, 0);
if (!FAILED(hres)) {
VARIANT vt_bstr_prop;
VariantInit(&vt_bstr_prop);
hres = VariantChangeType(&vt_bstr_prop, &vt_prop, 0, VT_BSTR);
if (!FAILED(hres)) {
value = vt_bstr_prop.bstrVal;
}
VariantClear(&vt_bstr_prop);
}
VariantClear(&vt_prop);
if (FAILED(hres)) {
derr << "Could not get WMI property: " << to_string(property)
<< ". HRESULT: " << hres << dendl;
}
return hres;
}
HRESULT get_property_int(
IWbemClassObject* cls_obj,
const std::wstring& property,
uint32_t& value)
{
VARIANT vt_prop;
VariantInit(&vt_prop);
HRESULT hres = cls_obj->Get(property.c_str(), 0, &vt_prop, 0, 0);
if (!FAILED(hres)) {
VARIANT vt_uint_prop;
VariantInit(&vt_uint_prop);
hres = VariantChangeType(&vt_uint_prop, &vt_prop, 0, VT_UINT);
if (!FAILED(hres)) {
value = vt_uint_prop.intVal;
}
VariantClear(&vt_uint_prop);
}
VariantClear(&vt_prop);
if (FAILED(hres)) {
derr << "Could not get WMI property: " << to_string(property)
<< ". HRESULT: " << hres << dendl;
}
return hres;
}
HRESULT WmiSubscription::initialize()
{
HRESULT hres = conn.initialize();
if (FAILED(hres)) {
derr << "Could not create WMI connection" << dendl;
return hres;
}
hres = conn.wbem_svc->ExecNotificationQuery(
_bstr_t(L"WQL").GetBSTR(),
_bstr_t(query.c_str()).GetBSTR(),
WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
NULL,
&event_enum);
if (FAILED(hres)) {
derr << "Notification query failed, unable to subscribe to "
<< "WMI events. HRESULT: " << hres << dendl;
} else {
dout(20) << "wmi subscription initialized: " << this
<< ", event enum: " << event_enum
<< ", conn: " << &conn << ", conn svc: " << conn.wbem_svc << dendl;
}
return hres;
}
void WmiSubscription::close()
{
dout(20) << "closing wmi subscription: " << this
<< ", event enum: " << event_enum << dendl;
if (event_enum != NULL) {
event_enum->Release();
event_enum = NULL;
}
}
HRESULT WmiSubscription::next(
long timeout,
ULONG count,
IWbemClassObject **objects,
ULONG *returned)
{
if (!event_enum) {
HRESULT hres = MAKE_HRESULT(
SEVERITY_ERROR, FACILITY_WIN32,
ERROR_INVALID_HANDLE);
derr << "WMI subscription uninitialized." << dendl;
return hres;
}
HRESULT hres = event_enum->Next(timeout, count, objects, returned);
if (FAILED(hres)) {
derr << "Unable to retrieve WMI events. HRESULT: "
<< hres << dendl;
}
return hres;
}
WmiSubscription subscribe_wnbd_adapter_events(
uint32_t interval)
{
std::wostringstream query_stream;
query_stream
<< L"SELECT * FROM __InstanceOperationEvent "
<< L"WITHIN " << interval
<< L"WHERE TargetInstance ISA 'Win32_ScsiController' "
<< L"AND TargetInstance.Description="
<< L"'WNBD SCSI Virtual Adapter'";
return WmiSubscription(L"root\\cimv2", query_stream.str());
}
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