1099543e4SBrad Bishop // SPDX-License-Identifier: Apache-2.0 2099543e4SBrad Bishop 3099543e4SBrad Bishop /**@file functions.cpp*/ 4099543e4SBrad Bishop 5099543e4SBrad Bishop #include "functions.hpp" 6099543e4SBrad Bishop 7099543e4SBrad Bishop #include <sdbusplus/bus.hpp> 8099543e4SBrad Bishop #include <sdbusplus/bus/match.hpp> 9*c79fa915SAdriana Kobylak #include <sdbusplus/exception.hpp> 10099543e4SBrad Bishop #include <sdbusplus/message.hpp> 11099543e4SBrad Bishop #include <sdeventplus/event.hpp> 12099543e4SBrad Bishop 13099543e4SBrad Bishop #include <filesystem> 14099543e4SBrad Bishop #include <functional> 15099543e4SBrad Bishop #include <iostream> 16099543e4SBrad Bishop #include <map> 17099543e4SBrad Bishop #include <memory> 18099543e4SBrad Bishop #include <string> 19099543e4SBrad Bishop #include <variant> 20099543e4SBrad Bishop #include <vector> 21099543e4SBrad Bishop 22099543e4SBrad Bishop namespace functions 23099543e4SBrad Bishop { 24099543e4SBrad Bishop namespace process_hostfirmware 25099543e4SBrad Bishop { 26099543e4SBrad Bishop 27099543e4SBrad Bishop /** 28099543e4SBrad Bishop * @brief Issue callbacks safely 29099543e4SBrad Bishop * 30099543e4SBrad Bishop * std::function can be empty, so this wrapper method checks for that prior to 31099543e4SBrad Bishop * calling it to avoid std::bad_function_call 32099543e4SBrad Bishop * 33099543e4SBrad Bishop * @tparam Sig the types of the std::function arguments 34099543e4SBrad Bishop * @tparam Args the deduced argument types 35099543e4SBrad Bishop * @param[in] callback the callback being wrapped 36099543e4SBrad Bishop * @param[in] args the callback arguments 37099543e4SBrad Bishop */ 38099543e4SBrad Bishop template <typename... Sig, typename... Args> 39099543e4SBrad Bishop void makeCallback(const std::function<void(Sig...)>& callback, Args&&... args) 40099543e4SBrad Bishop { 41099543e4SBrad Bishop if (callback) 42099543e4SBrad Bishop { 43099543e4SBrad Bishop callback(std::forward<Args>(args)...); 44099543e4SBrad Bishop } 45099543e4SBrad Bishop } 46099543e4SBrad Bishop 47099543e4SBrad Bishop /** 48099543e4SBrad Bishop * @brief Get file extensions for IBMCompatibleSystem 49099543e4SBrad Bishop * 50099543e4SBrad Bishop * IBM host firmware can be deployed as blobs (files) in a filesystem. Host 51099543e4SBrad Bishop * firmware blobs for different values of 52099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem are packaged with 53099543e4SBrad Bishop * different filename extensions. getExtensionsForIbmCompatibleSystem 54099543e4SBrad Bishop * maintains the mapping from a given value of 55099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem to an array of 56099543e4SBrad Bishop * filename extensions. 57099543e4SBrad Bishop * 58099543e4SBrad Bishop * If a mapping is found getExtensionsForIbmCompatibleSystem returns true and 59099543e4SBrad Bishop * the extensions parameter is reset with the map entry. If no mapping is 60099543e4SBrad Bishop * found getExtensionsForIbmCompatibleSystem returns false and extensions is 61099543e4SBrad Bishop * unmodified. 62099543e4SBrad Bishop * 63099543e4SBrad Bishop * @param[in] extensionMap a map of 64099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem to host firmware blob 65099543e4SBrad Bishop * file extensions. 66099543e4SBrad Bishop * @param[in] ibmCompatibleSystem The names property of an instance of 67099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem 68099543e4SBrad Bishop * @param[out] extentions the host firmware blob file extensions 69099543e4SBrad Bishop * @return true if an entry was found, otherwise false 70099543e4SBrad Bishop */ 71099543e4SBrad Bishop bool getExtensionsForIbmCompatibleSystem( 72099543e4SBrad Bishop const std::map<std::string, std::vector<std::string>>& extensionMap, 73099543e4SBrad Bishop const std::vector<std::string>& ibmCompatibleSystem, 74099543e4SBrad Bishop std::vector<std::string>& extensions) 75099543e4SBrad Bishop { 76099543e4SBrad Bishop for (const auto& system : ibmCompatibleSystem) 77099543e4SBrad Bishop { 78099543e4SBrad Bishop auto extensionMapIterator = extensionMap.find(system); 79099543e4SBrad Bishop if (extensionMapIterator != extensionMap.end()) 80099543e4SBrad Bishop { 81099543e4SBrad Bishop extensions = extensionMapIterator->second; 82099543e4SBrad Bishop return true; 83099543e4SBrad Bishop } 84099543e4SBrad Bishop } 85099543e4SBrad Bishop 86099543e4SBrad Bishop return false; 87099543e4SBrad Bishop } 88099543e4SBrad Bishop 89099543e4SBrad Bishop /** 90099543e4SBrad Bishop * @brief Write host firmware well-known name 91099543e4SBrad Bishop * 92099543e4SBrad Bishop * A wrapper around std::filesystem::create_symlink that avoids EEXIST by 93099543e4SBrad Bishop * deleting any pre-existing file. 94099543e4SBrad Bishop * 95099543e4SBrad Bishop * @param[in] linkTarget The link target argument to 96099543e4SBrad Bishop * std::filesystem::create_symlink 97099543e4SBrad Bishop * @param[in] linkPath The link path argument to std::filesystem::create_symlink 98099543e4SBrad Bishop * @param[in] errorCallback A callback made in the event of filesystem errors. 99099543e4SBrad Bishop */ 100099543e4SBrad Bishop void writeLink(const std::filesystem::path& linkTarget, 101099543e4SBrad Bishop const std::filesystem::path& linkPath, 102099543e4SBrad Bishop const ErrorCallbackType& errorCallback) 103099543e4SBrad Bishop { 104099543e4SBrad Bishop std::error_code ec; 105099543e4SBrad Bishop 106099543e4SBrad Bishop // remove files with the same name as the symlink to be created, 107099543e4SBrad Bishop // otherwise symlink will fail with EEXIST. 108099543e4SBrad Bishop if (!std::filesystem::remove(linkPath, ec)) 109099543e4SBrad Bishop { 110099543e4SBrad Bishop if (ec) 111099543e4SBrad Bishop { 112099543e4SBrad Bishop makeCallback(errorCallback, linkPath, ec); 113099543e4SBrad Bishop return; 114099543e4SBrad Bishop } 115099543e4SBrad Bishop } 116099543e4SBrad Bishop 117099543e4SBrad Bishop std::filesystem::create_symlink(linkTarget, linkPath, ec); 118099543e4SBrad Bishop if (ec) 119099543e4SBrad Bishop { 120099543e4SBrad Bishop makeCallback(errorCallback, linkPath, ec); 121099543e4SBrad Bishop return; 122099543e4SBrad Bishop } 123099543e4SBrad Bishop } 124099543e4SBrad Bishop 125099543e4SBrad Bishop /** 126099543e4SBrad Bishop * @brief Find host firmware blob files that need well-known names 127099543e4SBrad Bishop * 128099543e4SBrad Bishop * The IBM host firmware runtime looks for data and/or additional code while 129099543e4SBrad Bishop * bootstraping in files with well-known names. findLinks uses the provided 130099543e4SBrad Bishop * extensions argument to find host firmware blob files that require a 131099543e4SBrad Bishop * well-known name. When a blob is found, issue the provided callback 132099543e4SBrad Bishop * (typically a function that will write a symlink). 133099543e4SBrad Bishop * 134099543e4SBrad Bishop * @param[in] hostFirmwareDirectory The directory in which findLinks should 135099543e4SBrad Bishop * look for host firmware blob files that need well-known names. 136099543e4SBrad Bishop * @param[in] extentions The extensions of the firmware blob files denote a 137099543e4SBrad Bishop * host firmware blob file requires a well-known name. 138099543e4SBrad Bishop * @param[in] errorCallback A callback made in the event of filesystem errors. 139099543e4SBrad Bishop * @param[in] linkCallback A callback made when host firmware blob files 140099543e4SBrad Bishop * needing a well known name are found. 141099543e4SBrad Bishop */ 142099543e4SBrad Bishop void findLinks(const std::filesystem::path& hostFirmwareDirectory, 143099543e4SBrad Bishop const std::vector<std::string>& extensions, 144099543e4SBrad Bishop const ErrorCallbackType& errorCallback, 145099543e4SBrad Bishop const LinkCallbackType& linkCallback) 146099543e4SBrad Bishop { 147099543e4SBrad Bishop std::error_code ec; 148099543e4SBrad Bishop std::filesystem::directory_iterator directoryIterator(hostFirmwareDirectory, 149099543e4SBrad Bishop ec); 150099543e4SBrad Bishop if (ec) 151099543e4SBrad Bishop { 152099543e4SBrad Bishop makeCallback(errorCallback, hostFirmwareDirectory, ec); 153099543e4SBrad Bishop return; 154099543e4SBrad Bishop } 155099543e4SBrad Bishop 156fdc91fa0SAdriana Kobylak // Create a symlink from HBB to the corresponding LID file if it exists 157fdc91fa0SAdriana Kobylak static const auto hbbLid = "81e0065a.lid"; 158fdc91fa0SAdriana Kobylak auto hbbLidPath = hostFirmwareDirectory / hbbLid; 159fdc91fa0SAdriana Kobylak if (std::filesystem::exists(hbbLidPath)) 160fdc91fa0SAdriana Kobylak { 161fdc91fa0SAdriana Kobylak static const auto hbbName = "HBB"; 162fdc91fa0SAdriana Kobylak auto hbbLinkPath = hostFirmwareDirectory / hbbName; 163fdc91fa0SAdriana Kobylak makeCallback(linkCallback, hbbLid, hbbLinkPath, errorCallback); 164fdc91fa0SAdriana Kobylak } 165fdc91fa0SAdriana Kobylak 166099543e4SBrad Bishop for (; directoryIterator != std::filesystem::end(directoryIterator); 167099543e4SBrad Bishop directoryIterator.increment(ec)) 168099543e4SBrad Bishop { 169099543e4SBrad Bishop const auto& file = directoryIterator->path(); 170099543e4SBrad Bishop if (ec) 171099543e4SBrad Bishop { 172099543e4SBrad Bishop makeCallback(errorCallback, file, ec); 173099543e4SBrad Bishop // quit here if the increment call failed otherwise the loop may 174099543e4SBrad Bishop // never finish 175099543e4SBrad Bishop break; 176099543e4SBrad Bishop } 177099543e4SBrad Bishop 178099543e4SBrad Bishop if (std::find(extensions.begin(), extensions.end(), file.extension()) == 179099543e4SBrad Bishop extensions.end()) 180099543e4SBrad Bishop { 181099543e4SBrad Bishop // this file doesn't have an extension or doesn't match any of the 182099543e4SBrad Bishop // provided extensions. 183099543e4SBrad Bishop continue; 184099543e4SBrad Bishop } 185099543e4SBrad Bishop 186099543e4SBrad Bishop auto linkPath(file.parent_path().append( 187099543e4SBrad Bishop static_cast<const std::string&>(file.stem()))); 188099543e4SBrad Bishop 189099543e4SBrad Bishop makeCallback(linkCallback, file.filename(), linkPath, errorCallback); 190099543e4SBrad Bishop } 191099543e4SBrad Bishop } 192099543e4SBrad Bishop 193099543e4SBrad Bishop /** 194099543e4SBrad Bishop * @brief Make callbacks on 195099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem instances. 196099543e4SBrad Bishop * 197099543e4SBrad Bishop * Look for an instance of 198099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem in the provided 199099543e4SBrad Bishop * argument and if found, issue the provided callback. 200099543e4SBrad Bishop * 201099543e4SBrad Bishop * @param[in] interfacesAndProperties the interfaces in which to look for an 202099543e4SBrad Bishop * instance of xyz.openbmc_project.Configuration.IBMCompatibleSystem 203099543e4SBrad Bishop * @param[in] callback the user callback to make if 204099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem is found in 205099543e4SBrad Bishop * interfacesAndProperties 206099543e4SBrad Bishop * @return true if interfacesAndProperties contained an instance of 207099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem, false otherwise 208099543e4SBrad Bishop */ 209099543e4SBrad Bishop bool maybeCall(const std::map<std::string, 210099543e4SBrad Bishop std::map<std::string, 211099543e4SBrad Bishop std::variant<std::vector<std::string>>>>& 212099543e4SBrad Bishop interfacesAndProperties, 213099543e4SBrad Bishop const MaybeCallCallbackType& callback) 214099543e4SBrad Bishop { 215099543e4SBrad Bishop using namespace std::string_literals; 216099543e4SBrad Bishop 217099543e4SBrad Bishop static const auto interfaceName = 218099543e4SBrad Bishop "xyz.openbmc_project.Configuration.IBMCompatibleSystem"s; 219099543e4SBrad Bishop auto interfaceIterator = interfacesAndProperties.find(interfaceName); 220099543e4SBrad Bishop if (interfaceIterator == interfacesAndProperties.cend()) 221099543e4SBrad Bishop { 222099543e4SBrad Bishop // IBMCompatibleSystem interface not found, so instruct the caller to 223099543e4SBrad Bishop // keep waiting or try again later. 224099543e4SBrad Bishop return false; 225099543e4SBrad Bishop } 226099543e4SBrad Bishop auto propertyIterator = interfaceIterator->second.find("Names"s); 227099543e4SBrad Bishop if (propertyIterator == interfaceIterator->second.cend()) 228099543e4SBrad Bishop { 229099543e4SBrad Bishop // The interface exists but the property doesn't. This is a bug in the 230099543e4SBrad Bishop // IBMCompatibleSystem implementation. The caller should not try 231099543e4SBrad Bishop // again. 232099543e4SBrad Bishop std::cerr << "Names property not implemented on " << interfaceName 233099543e4SBrad Bishop << "\n"; 234099543e4SBrad Bishop return true; 235099543e4SBrad Bishop } 236099543e4SBrad Bishop 237099543e4SBrad Bishop const auto& ibmCompatibleSystem = 238099543e4SBrad Bishop std::get<std::vector<std::string>>(propertyIterator->second); 239099543e4SBrad Bishop if (callback) 240099543e4SBrad Bishop { 241099543e4SBrad Bishop callback(ibmCompatibleSystem); 242099543e4SBrad Bishop } 243099543e4SBrad Bishop 244099543e4SBrad Bishop // IBMCompatibleSystem found and callback issued. 245099543e4SBrad Bishop return true; 246099543e4SBrad Bishop } 247099543e4SBrad Bishop 248099543e4SBrad Bishop /** 249099543e4SBrad Bishop * @brief Make callbacks on 250099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem instances. 251099543e4SBrad Bishop * 252099543e4SBrad Bishop * Look for an instance of 253099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem in the provided 254099543e4SBrad Bishop * argument and if found, issue the provided callback. 255099543e4SBrad Bishop * 256099543e4SBrad Bishop * @param[in] message the DBus message in which to look for an instance of 257099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem 258099543e4SBrad Bishop * @param[in] callback the user callback to make if 259099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem is found in 260099543e4SBrad Bishop * message 261099543e4SBrad Bishop * @return true if message contained an instance of 262099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem, false otherwise 263099543e4SBrad Bishop */ 264099543e4SBrad Bishop bool maybeCallMessage(sdbusplus::message::message& message, 265099543e4SBrad Bishop const MaybeCallCallbackType& callback) 266099543e4SBrad Bishop { 267099543e4SBrad Bishop std::map<std::string, 268099543e4SBrad Bishop std::map<std::string, std::variant<std::vector<std::string>>>> 269099543e4SBrad Bishop interfacesAndProperties; 270099543e4SBrad Bishop sdbusplus::message::object_path _; 271099543e4SBrad Bishop message.read(_, interfacesAndProperties); 272099543e4SBrad Bishop return maybeCall(interfacesAndProperties, callback); 273099543e4SBrad Bishop } 274099543e4SBrad Bishop 275099543e4SBrad Bishop /** 276099543e4SBrad Bishop * @brief Determine system support for host firmware well-known names. 277099543e4SBrad Bishop * 278099543e4SBrad Bishop * Using the provided extensionMap and 279099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem, determine if 280099543e4SBrad Bishop * well-known names for host firmare blob files are necessary and if so, create 281099543e4SBrad Bishop * them. 282099543e4SBrad Bishop * 283099543e4SBrad Bishop * @param[in] extensionMap a map of 284099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem to host firmware blob 285099543e4SBrad Bishop * file extensions. 286099543e4SBrad Bishop * @param[in] hostFirmwareDirectory The directory in which findLinks should 287099543e4SBrad Bishop * look for host firmware blob files that need well-known names. 288099543e4SBrad Bishop * @param[in] ibmCompatibleSystem The names property of an instance of 289099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem 290099543e4SBrad Bishop * @param[in] errorCallback A callback made in the event of filesystem errors. 291099543e4SBrad Bishop */ 292099543e4SBrad Bishop void maybeMakeLinks( 293099543e4SBrad Bishop const std::map<std::string, std::vector<std::string>>& extensionMap, 294099543e4SBrad Bishop const std::filesystem::path& hostFirmwareDirectory, 295099543e4SBrad Bishop const std::vector<std::string>& ibmCompatibleSystem, 296099543e4SBrad Bishop const ErrorCallbackType& errorCallback) 297099543e4SBrad Bishop { 298099543e4SBrad Bishop std::vector<std::string> extensions; 299099543e4SBrad Bishop if (getExtensionsForIbmCompatibleSystem(extensionMap, ibmCompatibleSystem, 300099543e4SBrad Bishop extensions)) 301099543e4SBrad Bishop { 302099543e4SBrad Bishop findLinks(hostFirmwareDirectory, extensions, errorCallback, writeLink); 303099543e4SBrad Bishop } 304099543e4SBrad Bishop } 305099543e4SBrad Bishop 306099543e4SBrad Bishop /** 307099543e4SBrad Bishop * @brief process host firmware 308099543e4SBrad Bishop * 309099543e4SBrad Bishop * Allocate a callback context and register for DBus.ObjectManager Interfaces 310099543e4SBrad Bishop * added signals from entity manager. 311099543e4SBrad Bishop * 312099543e4SBrad Bishop * Check the current entity manager object tree for a 313099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem instance (entity 314099543e4SBrad Bishop * manager will be dbus activated if it is not running). If one is found, 315099543e4SBrad Bishop * determine if symlinks need to be created and create them. Instruct the 316099543e4SBrad Bishop * program event loop to exit. 317099543e4SBrad Bishop * 318099543e4SBrad Bishop * If no instance of xyz.openbmc_project.Configuration.IBMCompatibleSystem is 319099543e4SBrad Bishop * found return the callback context to main, where the program will sleep 320099543e4SBrad Bishop * until the callback is invoked one or more times and instructs the program 321099543e4SBrad Bishop * event loop to exit when 322099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem is added. 323099543e4SBrad Bishop * 324099543e4SBrad Bishop * @param[in] bus a DBus client connection 325099543e4SBrad Bishop * @param[in] extensionMap a map of 326099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem to host firmware blob 327099543e4SBrad Bishop * file extensions. 328099543e4SBrad Bishop * @param[in] hostFirmwareDirectory The directory in which processHostFirmware 329099543e4SBrad Bishop * should look for blob files. 330099543e4SBrad Bishop * @param[in] errorCallback A callback made in the event of filesystem errors. 331099543e4SBrad Bishop * @param[in] loop a program event loop 332099543e4SBrad Bishop * @return nullptr if an instance of 333099543e4SBrad Bishop * xyz.openbmc_project.Configuration.IBMCompatibleSystem is found, otherwise a 334099543e4SBrad Bishop * pointer to an sdbusplus match object. 335099543e4SBrad Bishop */ 336099543e4SBrad Bishop std::shared_ptr<void> processHostFirmware( 337099543e4SBrad Bishop sdbusplus::bus::bus& bus, 338099543e4SBrad Bishop std::map<std::string, std::vector<std::string>> extensionMap, 339099543e4SBrad Bishop std::filesystem::path hostFirmwareDirectory, 340099543e4SBrad Bishop ErrorCallbackType errorCallback, sdeventplus::Event& loop) 341099543e4SBrad Bishop { 342099543e4SBrad Bishop // ownership of extensionMap, hostFirmwareDirectory and errorCallback can't 343099543e4SBrad Bishop // be transfered to the match callback because they are needed in the non 344099543e4SBrad Bishop // async part of this function below, so they need to be moved to the heap. 345099543e4SBrad Bishop auto pExtensionMap = 346099543e4SBrad Bishop std::make_shared<decltype(extensionMap)>(std::move(extensionMap)); 347099543e4SBrad Bishop auto pHostFirmwareDirectory = 348099543e4SBrad Bishop std::make_shared<decltype(hostFirmwareDirectory)>( 349099543e4SBrad Bishop std::move(hostFirmwareDirectory)); 350099543e4SBrad Bishop auto pErrorCallback = 351099543e4SBrad Bishop std::make_shared<decltype(errorCallback)>(std::move(errorCallback)); 352099543e4SBrad Bishop 353099543e4SBrad Bishop // register for a callback in case the IBMCompatibleSystem interface has 354099543e4SBrad Bishop // not yet been published by entity manager. 355099543e4SBrad Bishop auto interfacesAddedMatch = std::make_shared<sdbusplus::bus::match::match>( 356099543e4SBrad Bishop bus, 357099543e4SBrad Bishop sdbusplus::bus::match::rules::interfacesAdded() + 358099543e4SBrad Bishop sdbusplus::bus::match::rules::sender( 359099543e4SBrad Bishop "xyz.openbmc_project.EntityManager"), 360099543e4SBrad Bishop [pExtensionMap, pHostFirmwareDirectory, pErrorCallback, 361099543e4SBrad Bishop &loop](auto& message) { 362099543e4SBrad Bishop // bind the extension map, host firmware directory, and error 363099543e4SBrad Bishop // callback to the maybeMakeLinks function. 364099543e4SBrad Bishop auto maybeMakeLinksWithArgsBound = 365099543e4SBrad Bishop std::bind(maybeMakeLinks, std::cref(*pExtensionMap), 366099543e4SBrad Bishop std::cref(*pHostFirmwareDirectory), 367099543e4SBrad Bishop std::placeholders::_1, std::cref(*pErrorCallback)); 368099543e4SBrad Bishop 369099543e4SBrad Bishop // if the InterfacesAdded message contains an an instance of 370099543e4SBrad Bishop // xyz.openbmc_project.Configuration.IBMCompatibleSystem, check to 371099543e4SBrad Bishop // see if links are necessary on this system and if so, create 372099543e4SBrad Bishop // them. 373099543e4SBrad Bishop if (maybeCallMessage(message, maybeMakeLinksWithArgsBound)) 374099543e4SBrad Bishop { 375099543e4SBrad Bishop // The IBMCompatibleSystem interface was found and the links 376099543e4SBrad Bishop // were created if applicable. Instruct the event loop / 377099543e4SBrad Bishop // subcommand to exit. 378099543e4SBrad Bishop loop.exit(0); 379099543e4SBrad Bishop } 380099543e4SBrad Bishop }); 381099543e4SBrad Bishop 382099543e4SBrad Bishop // now that we'll get a callback in the event of an InterfacesAdded signal 383099543e4SBrad Bishop // (potentially containing 384099543e4SBrad Bishop // xyz.openbmc_project.Configuration.IBMCompatibleSystem), activate entity 385099543e4SBrad Bishop // manager if it isn't running and enumerate its objects 386099543e4SBrad Bishop auto getManagedObjects = bus.new_method_call( 387099543e4SBrad Bishop "xyz.openbmc_project.EntityManager", "/", 388099543e4SBrad Bishop "org.freedesktop.DBus.ObjectManager", "GetManagedObjects"); 389099543e4SBrad Bishop std::map<std::string, 390099543e4SBrad Bishop std::map<std::string, std::variant<std::vector<std::string>>>> 391099543e4SBrad Bishop interfacesAndProperties; 392099543e4SBrad Bishop std::map<sdbusplus::message::object_path, decltype(interfacesAndProperties)> 393099543e4SBrad Bishop objects; 394*c79fa915SAdriana Kobylak try 395*c79fa915SAdriana Kobylak { 396*c79fa915SAdriana Kobylak auto reply = bus.call(getManagedObjects); 397099543e4SBrad Bishop reply.read(objects); 398*c79fa915SAdriana Kobylak } 399*c79fa915SAdriana Kobylak catch (const sdbusplus::exception::SdBusError& e) 400*c79fa915SAdriana Kobylak { 401*c79fa915SAdriana Kobylak // Error querying the EntityManager interface. Return the match to have 402*c79fa915SAdriana Kobylak // the callback run if/when the interface appears in D-Bus. 403*c79fa915SAdriana Kobylak return interfacesAddedMatch; 404*c79fa915SAdriana Kobylak } 405099543e4SBrad Bishop 406099543e4SBrad Bishop // bind the extension map, host firmware directory, and error callback to 407099543e4SBrad Bishop // the maybeMakeLinks function. 408099543e4SBrad Bishop auto maybeMakeLinksWithArgsBound = 409099543e4SBrad Bishop std::bind(maybeMakeLinks, std::cref(*pExtensionMap), 410099543e4SBrad Bishop std::cref(*pHostFirmwareDirectory), std::placeholders::_1, 411099543e4SBrad Bishop std::cref(*pErrorCallback)); 412099543e4SBrad Bishop 413099543e4SBrad Bishop for (const auto& pair : objects) 414099543e4SBrad Bishop { 415099543e4SBrad Bishop std::tie(std::ignore, interfacesAndProperties) = pair; 416099543e4SBrad Bishop // if interfacesAndProperties contains an an instance of 417099543e4SBrad Bishop // xyz.openbmc_project.Configuration.IBMCompatibleSystem, check to see 418099543e4SBrad Bishop // if links are necessary on this system and if so, create them 419099543e4SBrad Bishop if (maybeCall(interfacesAndProperties, maybeMakeLinksWithArgsBound)) 420099543e4SBrad Bishop { 421099543e4SBrad Bishop // The IBMCompatibleSystem interface is already on the bus and the 422099543e4SBrad Bishop // links were created if applicable. Instruct the event loop to 423099543e4SBrad Bishop // exit. 424099543e4SBrad Bishop loop.exit(0); 425099543e4SBrad Bishop // The match object isn't needed anymore, so destroy it on return. 426099543e4SBrad Bishop return nullptr; 427099543e4SBrad Bishop } 428099543e4SBrad Bishop } 429099543e4SBrad Bishop 430099543e4SBrad Bishop // The IBMCompatibleSystem interface has not yet been published. Move 431099543e4SBrad Bishop // ownership of the match callback to the caller. 432099543e4SBrad Bishop return interfacesAddedMatch; 433099543e4SBrad Bishop } 434099543e4SBrad Bishop } // namespace process_hostfirmware 435099543e4SBrad Bishop } // namespace functions 436