1 /** 2 * Copyright 2017 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include "dbuspassive.hpp" 17 18 #include "dbus/util.hpp" 19 20 #include <chrono> 21 #include <cmath> 22 #include <memory> 23 #include <mutex> 24 #include <sdbusplus/bus.hpp> 25 #include <string> 26 27 std::unique_ptr<ReadInterface> DbusPassive::createDbusPassive( 28 sdbusplus::bus::bus& bus, const std::string& type, const std::string& id, 29 DbusHelperInterface* helper) 30 { 31 if (helper == nullptr) 32 { 33 return nullptr; 34 } 35 if (!validType(type)) 36 { 37 return nullptr; 38 } 39 40 /* Need to get the scale and initial value */ 41 auto tempBus = sdbusplus::bus::new_default(); 42 43 /* service == busname */ 44 std::string path = getSensorPath(type, id); 45 46 struct SensorProperties settings; 47 bool failed; 48 49 try 50 { 51 std::string service = helper->getService(tempBus, sensorintf, path); 52 53 helper->getProperties(tempBus, service, path, &settings); 54 failed = helper->thresholdsAsserted(tempBus, service, path); 55 } 56 catch (const std::exception& e) 57 { 58 return nullptr; 59 } 60 61 return std::make_unique<DbusPassive>(bus, type, id, helper, settings, 62 failed); 63 } 64 65 DbusPassive::DbusPassive(sdbusplus::bus::bus& bus, const std::string& type, 66 const std::string& id, DbusHelperInterface* helper, 67 const struct SensorProperties& settings, bool failed) : 68 ReadInterface(), 69 _bus(bus), _signal(bus, getMatch(type, id).c_str(), dbusHandleSignal, this), 70 _id(id), _helper(helper), _failed(failed) 71 { 72 _scale = settings.scale; 73 _value = settings.value * pow(10, _scale); 74 _updated = std::chrono::high_resolution_clock::now(); 75 } 76 77 ReadReturn DbusPassive::read(void) 78 { 79 std::lock_guard<std::mutex> guard(_lock); 80 81 struct ReadReturn r = {_value, _updated}; 82 83 return r; 84 } 85 86 void DbusPassive::setValue(double value) 87 { 88 std::lock_guard<std::mutex> guard(_lock); 89 90 _value = value; 91 _updated = std::chrono::high_resolution_clock::now(); 92 } 93 94 bool DbusPassive::getFailed(void) const 95 { 96 return _failed; 97 } 98 99 void DbusPassive::setFailed(bool value) 100 { 101 _failed = value; 102 } 103 104 int64_t DbusPassive::getScale(void) 105 { 106 return _scale; 107 } 108 109 std::string DbusPassive::getID(void) 110 { 111 return _id; 112 } 113 114 int handleSensorValue(sdbusplus::message::message& msg, DbusPassive* owner) 115 { 116 std::string msgSensor; 117 std::map<std::string, sdbusplus::message::variant<int64_t, double, bool>> 118 msgData; 119 120 msg.read(msgSensor, msgData); 121 122 if (msgSensor == "xyz.openbmc_project.Sensor.Value") 123 { 124 auto valPropMap = msgData.find("Value"); 125 if (valPropMap != msgData.end()) 126 { 127 double value = sdbusplus::message::variant_ns::apply_visitor( 128 VariantToDoubleVisitor(), valPropMap->second); 129 130 value *= std::pow(10, owner->getScale()); 131 132 owner->setValue(value); 133 } 134 } 135 else if (msgSensor == "xyz.openbmc_project.Sensor.Threshold.Critical") 136 { 137 auto criticalAlarmLow = msgData.find("CriticalAlarmLow"); 138 auto criticalAlarmHigh = msgData.find("CriticalAlarmHigh"); 139 if (criticalAlarmHigh == msgData.end() && 140 criticalAlarmLow == msgData.end()) 141 { 142 return 0; 143 } 144 145 bool asserted = false; 146 if (criticalAlarmLow != msgData.end()) 147 { 148 asserted = sdbusplus::message::variant_ns::get<bool>( 149 criticalAlarmLow->second); 150 } 151 152 // checking both as in theory you could de-assert one threshold and 153 // assert the other at the same moment 154 if (!asserted && criticalAlarmHigh != msgData.end()) 155 { 156 asserted = sdbusplus::message::variant_ns::get<bool>( 157 criticalAlarmHigh->second); 158 } 159 owner->setFailed(asserted); 160 } 161 162 return 0; 163 } 164 165 int dbusHandleSignal(sd_bus_message* msg, void* usrData, sd_bus_error* err) 166 { 167 auto sdbpMsg = sdbusplus::message::message(msg); 168 DbusPassive* obj = static_cast<DbusPassive*>(usrData); 169 170 return handleSensorValue(sdbpMsg, obj); 171 } 172