1 #pragma once 2 3 #include <phosphor-logging/log.hpp> 4 #include <phosphor-logging/elog.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, 32 const std::string& interface, 33 sdbusplus::bus::bus& bus); 34 35 /** 36 * @brief Read a D-Bus property 37 * 38 * @param[in] interface - the interface the property is on 39 * @param[in] propertName - the name of the property 40 * @param[in] path - the D-Bus path 41 * @param[in] service - the D-Bus service 42 * @param[in] bus - the D-Bus object 43 * @param[out] value - filled in with the property value 44 */ 45 template<typename T> 46 void getProperty(const std::string& interface, 47 const std::string& propertyName, 48 const std::string& path, 49 const std::string& service, 50 sdbusplus::bus::bus& bus, 51 T& value) 52 { 53 sdbusplus::message::variant<T> property; 54 55 auto method = bus.new_method_call(service.c_str(), 56 path.c_str(), 57 PROPERTY_INTF, 58 "Get"); 59 60 method.append(interface, propertyName); 61 62 auto reply = bus.call(method); 63 if (reply.is_method_error()) 64 { 65 using namespace phosphor::logging; 66 log<level::ERR>("Error in property get call", 67 entry("PATH=%s", path.c_str()), 68 entry("PROPERTY=%s", propertyName.c_str())); 69 70 // TODO openbmc/openbmc#851 - Once available, throw returned error 71 throw std::runtime_error("Error in property get call"); 72 } 73 74 reply.read(property); 75 value = sdbusplus::message::variant_ns::get<T>(property); 76 } 77 78 /** 79 * Logs an error and powers off the system. 80 * 81 * @tparam T - error that will be logged before the power off 82 * @param[in] bus - D-Bus object 83 */ 84 template<typename T> 85 void powerOff(sdbusplus::bus::bus& bus) 86 { 87 phosphor::logging::report<T>(); 88 89 auto method = bus.new_method_call(SYSTEMD_SERVICE, 90 SYSTEMD_ROOT, 91 SYSTEMD_INTERFACE, 92 "StartUnit"); 93 94 method.append(POWEROFF_TARGET); 95 method.append("replace"); 96 97 bus.call_noreply(method); 98 } 99 100 } 101 } 102 } 103