1 #pragma once 2 3 #include <phosphor-logging/elog.hpp> 4 #include <phosphor-logging/log.hpp> 5 #include <sdbusplus/bus.hpp> 6 #include <string> 7 8 namespace witherspoon 9 { 10 namespace power 11 { 12 namespace util 13 { 14 15 constexpr auto SYSTEMD_SERVICE = "org.freedesktop.systemd1"; 16 constexpr auto SYSTEMD_ROOT = "/org/freedesktop/systemd1"; 17 constexpr auto SYSTEMD_INTERFACE = "org.freedesktop.systemd1.Manager"; 18 constexpr auto POWEROFF_TARGET = "obmc-chassis-hard-poweroff@0.target"; 19 constexpr auto PROPERTY_INTF = "org.freedesktop.DBus.Properties"; 20 21 /** 22 * @brief Get the service name from the mapper for the 23 * interface and path passed in. 24 * 25 * @param[in] path - the D-Bus path name 26 * @param[in] interface - the D-Bus interface name 27 * @param[in] bus - the D-Bus object 28 * 29 * @return The service name 30 */ 31 std::string getService(const std::string& path, const std::string& interface, 32 sdbusplus::bus::bus& bus); 33 34 /** 35 * @brief Read a D-Bus property 36 * 37 * @param[in] interface - the interface the property is on 38 * @param[in] propertName - the name of the property 39 * @param[in] path - the D-Bus path 40 * @param[in] service - the D-Bus service 41 * @param[in] bus - the D-Bus object 42 * @param[out] value - filled in with the property value 43 */ 44 template <typename T> 45 void getProperty(const std::string& interface, const std::string& propertyName, 46 const std::string& path, const std::string& service, 47 sdbusplus::bus::bus& bus, T& value) 48 { 49 sdbusplus::message::variant<T> property; 50 51 auto method = bus.new_method_call(service.c_str(), path.c_str(), 52 PROPERTY_INTF, "Get"); 53 54 method.append(interface, propertyName); 55 56 auto reply = bus.call(method); 57 if (reply.is_method_error()) 58 { 59 using namespace phosphor::logging; 60 log<level::ERR>("Error in property get call", 61 entry("PATH=%s", path.c_str()), 62 entry("PROPERTY=%s", propertyName.c_str())); 63 64 // TODO openbmc/openbmc#851 - Once available, throw returned error 65 throw std::runtime_error("Error in property get call"); 66 } 67 68 reply.read(property); 69 value = sdbusplus::message::variant_ns::get<T>(property); 70 } 71 72 /** 73 * @brief Write a D-Bus property 74 * 75 * @param[in] interface - the interface the property is on 76 * @param[in] propertName - the name of the property 77 * @param[in] path - the D-Bus path 78 * @param[in] service - the D-Bus service 79 * @param[in] bus - the D-Bus object 80 * @param[in] value - the value to set the property to 81 */ 82 template <typename T> 83 void setProperty(const std::string& interface, const std::string& propertyName, 84 const std::string& path, const std::string& service, 85 sdbusplus::bus::bus& bus, T& value) 86 { 87 sdbusplus::message::variant<T> propertyValue(value); 88 89 auto method = bus.new_method_call(service.c_str(), path.c_str(), 90 PROPERTY_INTF, "Set"); 91 92 method.append(interface, propertyName, propertyValue); 93 94 auto reply = bus.call(method); 95 if (reply.is_method_error()) 96 { 97 using namespace phosphor::logging; 98 log<level::ERR>("Error in property set call", 99 entry("SERVICE=%s", service.c_str()), 100 entry("PATH=%s", path.c_str()), 101 entry("PROPERTY=%s", propertyName.c_str())); 102 103 // TODO openbmc/openbmc#851 - Once available, throw returned error 104 throw std::runtime_error("Error in property set call"); 105 } 106 } 107 108 /** 109 * Logs an error and powers off the system. 110 * 111 * @tparam T - error that will be logged before the power off 112 * @param[in] bus - D-Bus object 113 */ 114 template <typename T> 115 void powerOff(sdbusplus::bus::bus& bus) 116 { 117 phosphor::logging::report<T>(); 118 119 auto method = bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_ROOT, 120 SYSTEMD_INTERFACE, "StartUnit"); 121 122 method.append(POWEROFF_TARGET); 123 method.append("replace"); 124 125 bus.call_noreply(method); 126 } 127 128 } // namespace util 129 } // namespace power 130 } // namespace witherspoon 131