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 return std::make_unique<DbusPassive>(bus, type, id, helper); 41 } 42 43 DbusPassive::DbusPassive(sdbusplus::bus::bus& bus, const std::string& type, 44 const std::string& id, DbusHelperInterface* helper) : 45 ReadInterface(), 46 _bus(bus), _signal(bus, getMatch(type, id).c_str(), dbusHandleSignal, this), 47 _id(id), _helper(helper) 48 { 49 /* Need to get the scale and initial value */ 50 auto tempBus = sdbusplus::bus::new_default(); 51 /* service == busname */ 52 std::string path = getSensorPath(type, id); 53 54 /* getService can except, should this be in the factory? */ 55 std::string service = _helper->getService(tempBus, sensorintf, path); 56 57 struct SensorProperties settings; 58 _helper->getProperties(tempBus, service, path, &settings); 59 60 _scale = settings.scale; 61 _value = settings.value * pow(10, _scale); 62 _updated = std::chrono::high_resolution_clock::now(); 63 _failed = _helper->thresholdsAsserted(tempBus, service, path); 64 } 65 66 ReadReturn DbusPassive::read(void) 67 { 68 std::lock_guard<std::mutex> guard(_lock); 69 70 struct ReadReturn r = {_value, _updated}; 71 72 return r; 73 } 74 75 void DbusPassive::setValue(double value) 76 { 77 std::lock_guard<std::mutex> guard(_lock); 78 79 _value = value; 80 _updated = std::chrono::high_resolution_clock::now(); 81 } 82 83 bool DbusPassive::getFailed(void) const 84 { 85 return _failed; 86 } 87 88 void DbusPassive::setFailed(bool value) 89 { 90 _failed = value; 91 } 92 93 int64_t DbusPassive::getScale(void) 94 { 95 return _scale; 96 } 97 98 std::string DbusPassive::getID(void) 99 { 100 return _id; 101 } 102 103 int handleSensorValue(sdbusplus::message::message& msg, DbusPassive* owner) 104 { 105 std::string msgSensor; 106 std::map<std::string, sdbusplus::message::variant<int64_t, double, bool>> 107 msgData; 108 109 msg.read(msgSensor, msgData); 110 111 if (msgSensor == "xyz.openbmc_project.Sensor.Value") 112 { 113 auto valPropMap = msgData.find("Value"); 114 if (valPropMap != msgData.end()) 115 { 116 double value = sdbusplus::message::variant_ns::apply_visitor( 117 VariantToDoubleVisitor(), valPropMap->second); 118 119 value *= std::pow(10, owner->getScale()); 120 121 owner->setValue(value); 122 } 123 } 124 else if (msgSensor == "xyz.openbmc_project.Sensor.Threshold.Critical") 125 { 126 auto criticalAlarmLow = msgData.find("CriticalAlarmLow"); 127 auto criticalAlarmHigh = msgData.find("CriticalAlarmHigh"); 128 if (criticalAlarmHigh == msgData.end() && 129 criticalAlarmLow == msgData.end()) 130 { 131 return 0; 132 } 133 134 bool asserted = false; 135 if (criticalAlarmLow != msgData.end()) 136 { 137 asserted = sdbusplus::message::variant_ns::get<bool>( 138 criticalAlarmLow->second); 139 } 140 141 // checking both as in theory you could de-assert one threshold and 142 // assert the other at the same moment 143 if (!asserted && criticalAlarmHigh != msgData.end()) 144 { 145 asserted = sdbusplus::message::variant_ns::get<bool>( 146 criticalAlarmHigh->second); 147 } 148 owner->setFailed(asserted); 149 } 150 151 return 0; 152 } 153 154 int dbusHandleSignal(sd_bus_message* msg, void* usrData, sd_bus_error* err) 155 { 156 auto sdbpMsg = sdbusplus::message::message(msg); 157 DbusPassive* obj = static_cast<DbusPassive*>(usrData); 158 159 return handleSensorValue(sdbpMsg, obj); 160 } 161