1 /** 2 * Copyright © 2020 IBM Corporation 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 #pragma once 17 18 #include "action.hpp" 19 #include "config_base.hpp" 20 #include "event.hpp" 21 #include "group.hpp" 22 #include "json_config.hpp" 23 #include "power_state.hpp" 24 #include "profile.hpp" 25 #include "sdbusplus.hpp" 26 #include "utils/flight_recorder.hpp" 27 #include "zone.hpp" 28 29 #include <fmt/format.h> 30 31 #include <nlohmann/json.hpp> 32 #include <phosphor-logging/log.hpp> 33 #include <sdbusplus/bus.hpp> 34 #include <sdbusplus/server/manager.hpp> 35 #include <sdeventplus/event.hpp> 36 #include <sdeventplus/source/event.hpp> 37 #include <sdeventplus/utility/timer.hpp> 38 39 #include <chrono> 40 #include <map> 41 #include <memory> 42 #include <optional> 43 #include <tuple> 44 #include <utility> 45 #include <vector> 46 47 namespace phosphor::fan::control::json 48 { 49 50 using json = nlohmann::json; 51 using namespace phosphor::logging; 52 53 /* Application name to be appended to the path for loading a JSON config file */ 54 constexpr auto confAppName = "control"; 55 56 /* Type of timers supported */ 57 enum class TimerType 58 { 59 oneshot, 60 repeating, 61 }; 62 /** 63 * Package of data required when a timer expires 64 * Tuple constructed of: 65 * std::string = Timer package unique identifier 66 * std::vector<std::unique_ptr<ActionBase>> = List of pointers to actions 67 * that run when the timer expires 68 * const std::vector<Group> = List of groups 69 * bool = If groups should be preloaded before actions are run 70 */ 71 using TimerPkg = 72 std::tuple<std::string, std::vector<std::unique_ptr<ActionBase>>&, 73 const std::vector<Group>&, bool>; 74 /** 75 * Data associated with a running timer that's used when it expires 76 * Pair constructed of: 77 * TimerType = Type of timer to manage expired timer instances 78 * TimerPkg = Package of data required when the timer expires 79 */ 80 using TimerData = std::pair<TimerType, TimerPkg>; 81 /* Dbus event timer */ 82 using Timer = sdeventplus::utility::Timer<sdeventplus::ClockId::Monotonic>; 83 84 /* Dbus signal object */ 85 constexpr auto Path = 0; 86 constexpr auto Intf = 1; 87 constexpr auto Prop = 2; 88 using SignalObject = std::tuple<std::string, std::string, std::string>; 89 /* Dbus signal actions */ 90 using TriggerActions = 91 std::vector<std::reference_wrapper<std::unique_ptr<ActionBase>>>; 92 /** 93 * Signal handler function that handles parsing a signal's message for a 94 * particular signal object and stores the results in the manager 95 */ 96 using SignalHandler = std::function<bool(sdbusplus::message::message&, 97 const SignalObject&, Manager&)>; 98 /** 99 * Package of data required when a signal is received 100 * Tuple constructed of: 101 * SignalHandler = Signal handler function 102 * SignalObject = Dbus signal object 103 * TriggerActions = List of actions that are run when the signal is received 104 */ 105 using SignalPkg = std::tuple<SignalHandler, SignalObject, TriggerActions>; 106 /** 107 * Data associated to a subscribed signal 108 * Tuple constructed of: 109 * std::unique_ptr<std::vector<SignalPkg>> = 110 * Pointer to list of the signal's packages 111 * std::unique_ptr<sdbusplus::bus::match_t> = 112 * Pointer to match holding the subscription to a signal 113 */ 114 using SignalData = std::tuple<std::unique_ptr<std::vector<SignalPkg>>, 115 std::unique_ptr<sdbusplus::bus::match_t>>; 116 117 /** 118 * Package of data from a D-Bus call to get managed objects 119 * Tuple constructed of: 120 * std::map<Path, // D-Bus Path 121 * std::map<Intf, // D-Bus Interface 122 * std::map<Property, // D-Bus Property 123 * std::variant>>> // Variant value of that property 124 */ 125 using Path_v = sdbusplus::message::object_path; 126 using Intf_v = std::string; 127 using Prop_v = std::string; 128 using ManagedObjects = 129 std::map<Path_v, std::map<Intf_v, std::map<Prop_v, PropertyVariantType>>>; 130 131 /** 132 * Actions to run when a parameter trigger runs. 133 */ 134 using ParamTriggerData = std::vector< 135 std::reference_wrapper<const std::vector<std::unique_ptr<ActionBase>>>>; 136 137 /** 138 * @class Manager - Represents the fan control manager's configuration 139 * 140 * A fan control manager configuration is optional, therefore the "manager.json" 141 * file is also optional. The manager configuration is used to populate 142 * fan control's manager parameters which are used in how the application 143 * operates, not in how the fans are controlled. 144 * 145 * When no manager configuration exists, the fan control application starts, 146 * processes any configured events and then begins controlling fans according 147 * to those events. 148 */ 149 class Manager 150 { 151 public: 152 Manager() = delete; 153 Manager(const Manager&) = delete; 154 Manager(Manager&&) = delete; 155 Manager& operator=(const Manager&) = delete; 156 Manager& operator=(Manager&&) = delete; 157 ~Manager() = default; 158 159 /** 160 * Constructor 161 * Parses and populates the fan control manager attributes from a json file 162 * 163 * @param[in] event - sdeventplus event loop 164 */ 165 Manager(const sdeventplus::Event& event); 166 167 /** 168 * @brief Callback function to handle receiving a HUP signal to reload the 169 * JSON configurations. 170 */ 171 void sighupHandler(sdeventplus::source::Signal&, 172 const struct signalfd_siginfo*); 173 174 /** 175 * @brief Callback function to handle receiving a USR1 signal to dump 176 * the flight recorder. 177 */ 178 void sigUsr1Handler(sdeventplus::source::Signal&, 179 const struct signalfd_siginfo*); 180 181 /** 182 * @brief Get the active profiles of the system where an empty list 183 * represents that only configuration entries without a profile defined will 184 * be loaded. 185 * 186 * @return - The list of active profiles 187 */ 188 static const std::vector<std::string>& getActiveProfiles(); 189 190 /** 191 * @brief Load the configuration of a given JSON class object based on the 192 * active profiles 193 * 194 * @param[in] isOptional - JSON configuration file is optional or not 195 * @param[in] args - Arguments to be forwarded to each instance of `T` 196 * (*Note that a sdbusplus bus object is required as the first argument) 197 * 198 * @return Map of configuration entries 199 * Map of configuration keys to their corresponding configuration object 200 */ 201 template <typename T, typename... Args> 202 static std::map<configKey, std::unique_ptr<T>> getConfig(bool isOptional, 203 Args&&... args) 204 { 205 std::map<configKey, std::unique_ptr<T>> config; 206 207 auto confFile = 208 fan::JsonConfig::getConfFile(util::SDBusPlus::getBus(), confAppName, 209 T::confFileName, isOptional); 210 if (!confFile.empty()) 211 { 212 FlightRecorder::instance().log( 213 "main", fmt::format("Loading configuration from {}", 214 confFile.string())); 215 for (const auto& entry : fan::JsonConfig::load(confFile)) 216 { 217 if (entry.contains("profiles")) 218 { 219 std::vector<std::string> profiles; 220 for (const auto& profile : entry["profiles"]) 221 { 222 profiles.emplace_back( 223 profile.template get<std::string>()); 224 } 225 // Do not create the object if its profiles are not in the 226 // list of active profiles 227 if (!profiles.empty() && 228 !std::any_of(profiles.begin(), profiles.end(), 229 [](const auto& name) { 230 return std::find( 231 getActiveProfiles().begin(), 232 getActiveProfiles().end(), 233 name) != 234 getActiveProfiles().end(); 235 })) 236 { 237 continue; 238 } 239 } 240 auto obj = 241 std::make_unique<T>(entry, std::forward<Args>(args)...); 242 config.emplace( 243 std::make_pair(obj->getName(), obj->getProfiles()), 244 std::move(obj)); 245 } 246 log<level::INFO>( 247 fmt::format("Configuration({}) loaded successfully", 248 T::confFileName) 249 .c_str()); 250 FlightRecorder::instance().log( 251 "main", fmt::format("Configuration({}) loaded successfully", 252 T::confFileName)); 253 } 254 return config; 255 } 256 257 /** 258 * @brief Check if the given input configuration key matches with another 259 * configuration key that it's to be included in 260 * 261 * @param[in] input - Config key to be included in another config object 262 * @param[in] comp - Config key of the config object to compare with 263 * 264 * @return Whether the configuration object should be included 265 */ 266 static bool inConfig(const configKey& input, const configKey& comp); 267 268 /** 269 * @brief Check if the given path and inteface is owned by a dbus service 270 * 271 * @param[in] path - Dbus object path 272 * @param[in] intf - Dbus object interface 273 * 274 * @return - Whether the service has an owner for the given object path and 275 * interface 276 */ 277 static bool hasOwner(const std::string& path, const std::string& intf); 278 279 /** 280 * @brief Sets the dbus service owner state for all entries in the _servTree 281 * cache and removes associated objects from the _objects cache 282 * 283 * @param[in] serv - Dbus service name 284 * @param[in] hasOwner - Dbus service owner state 285 */ 286 void setOwner(const std::string& serv, bool hasOwner); 287 288 /** 289 * @brief Sets the dbus service owner state of a given object 290 * 291 * @param[in] path - Dbus object path 292 * @param[in] serv - Dbus service name 293 * @param[in] intf - Dbus object interface 294 * @param[in] isOwned - Dbus service owner state 295 */ 296 void setOwner(const std::string& path, const std::string& serv, 297 const std::string& intf, bool isOwned); 298 299 /** 300 * @brief Add a set of services for a path and interface by retrieving all 301 * the path subtrees to the given depth from root for the interface 302 * 303 * @param[in] intf - Interface to add services for 304 * @param[in] depth - Depth of tree traversal from root path 305 * 306 * @throws - DBusMethodError 307 * Throws a DBusMethodError when the `getSubTree` method call fails 308 */ 309 static void addServices(const std::string& intf, int32_t depth); 310 311 /** 312 * @brief Get the service for a given path and interface from cached 313 * dataset and attempt to add all the services for the given path/interface 314 * when it's not found 315 * 316 * @param[in] path - Path to get service for 317 * @param[in] intf - Interface to get service for 318 * 319 * @return - The now cached service name 320 * 321 * @throws - DBusMethodError 322 * Ripples up a DBusMethodError exception from calling addServices 323 */ 324 static const std::string& getService(const std::string& path, 325 const std::string& intf); 326 327 /** 328 * @brief Get all the object paths for a given service and interface from 329 * the cached dataset and try to add all the services for the given 330 * interface when no paths are found and then attempt to get all the object 331 * paths again 332 * 333 * @param[in] serv - Service name to get paths for 334 * @param[in] intf - Interface to get paths for 335 * 336 * @return The cached object paths 337 */ 338 std::vector<std::string> getPaths(const std::string& serv, 339 const std::string& intf); 340 341 /** 342 * @brief Add objects to the cached dataset by first using 343 * `getManagedObjects` for the same service providing the given path and 344 * interface or just add the single object of the given path, interface, and 345 * property if that fails. 346 * 347 * @param[in] path - Dbus object's path 348 * @param[in] intf - Dbus object's interface 349 * @param[in] prop - Dbus object's property 350 * 351 * @throws - DBusMethodError 352 * Throws a DBusMethodError when the the service is failed to be found or 353 * when the `getManagedObjects` method call fails 354 */ 355 void addObjects(const std::string& path, const std::string& intf, 356 const std::string& prop); 357 358 /** 359 * @brief Get an object's property value 360 * 361 * @param[in] path - Dbus object's path 362 * @param[in] intf - Dbus object's interface 363 * @param[in] prop - Dbus object's property 364 */ 365 const std::optional<PropertyVariantType> 366 getProperty(const std::string& path, const std::string& intf, 367 const std::string& prop); 368 369 /** 370 * @brief Set/update an object's property value 371 * 372 * @param[in] path - Dbus object's path 373 * @param[in] intf - Dbus object's interface 374 * @param[in] prop - Dbus object's property 375 * @param[in] value - Dbus object's property value 376 */ 377 void setProperty(const std::string& path, const std::string& intf, 378 const std::string& prop, PropertyVariantType value); 379 380 /** 381 * @brief Remove an object's interface 382 * 383 * @param[in] path - Dbus object's path 384 * @param[in] intf - Dbus object's interface 385 */ 386 inline void removeInterface(const std::string& path, 387 const std::string& intf) 388 { 389 auto itPath = _objects.find(path); 390 if (itPath != std::end(_objects)) 391 { 392 _objects[path].erase(intf); 393 } 394 } 395 396 /** 397 * @brief Get the object's property value as a variant 398 * 399 * @param[in] path - Path of the object containing the property 400 * @param[in] intf - Interface name containing the property 401 * @param[in] prop - Name of property 402 * 403 * @return - The object's property value as a variant 404 */ 405 static inline auto getObjValueVariant(const std::string& path, 406 const std::string& intf, 407 const std::string& prop) 408 { 409 return _objects.at(path).at(intf).at(prop); 410 }; 411 412 /** 413 * @brief Add a dbus timer 414 * 415 * @param[in] type - Type of timer 416 * @param[in] interval - Timer interval in microseconds 417 * @param[in] pkg - Packaged data for when timer expires 418 */ 419 void addTimer(const TimerType type, 420 const std::chrono::microseconds interval, 421 std::unique_ptr<TimerPkg> pkg); 422 423 /** 424 * @brief Callback when a timer expires 425 * 426 * @param[in] data - Data to be used when the timer expired 427 */ 428 void timerExpired(TimerData& data); 429 430 /** 431 * @brief Get the signal data for a given match string 432 * 433 * @param[in] sigMatch - Signal match string 434 * 435 * @return - Reference to the signal data for the given match string 436 */ 437 std::vector<SignalData>& getSignal(const std::string& sigMatch) 438 { 439 return _signals[sigMatch]; 440 } 441 442 /** 443 * @brief Handle receiving signals 444 * 445 * @param[in] msg - Signal message containing the signal's data 446 * @param[in] pkgs - Signal packages associated to the signal being handled 447 */ 448 void handleSignal(sdbusplus::message::message& msg, 449 const std::vector<SignalPkg>* pkgs); 450 451 /** 452 * @brief Get the sdbusplus bus object 453 */ 454 inline auto& getBus() 455 { 456 return _bus; 457 } 458 459 /** 460 * @brief Is the power state on 461 * 462 * @return Current power state of the system 463 */ 464 inline bool isPowerOn() const 465 { 466 return _powerState->isPowerOn(); 467 } 468 469 /** 470 * @brief Load all the fan control JSON configuration files 471 * 472 * This is where all the fan control JSON configuration files are parsed and 473 * loaded into their associated objects. Anything that needs to be done when 474 * the Manager object is constructed or handling a SIGHUP to reload the 475 * configurations needs to be done here. 476 */ 477 void load(); 478 479 /** 480 * @brief Sets a value in the parameter map. 481 * 482 * If it's a std::nullopt, it will be deleted instead. 483 * 484 * @param[in] name - The parameter name 485 * @param[in] value - The parameter value 486 */ 487 static void setParameter(const std::string& name, 488 const std::optional<PropertyVariantType>& value) 489 { 490 if (value) 491 { 492 auto it = _parameters.find(name); 493 auto changed = (it == _parameters.end()) || 494 ((it != _parameters.end()) && it->second != *value); 495 _parameters[name] = *value; 496 497 if (changed) 498 { 499 runParameterActions(name); 500 } 501 } 502 else 503 { 504 size_t deleted = _parameters.erase(name); 505 506 if (deleted) 507 { 508 runParameterActions(name); 509 } 510 } 511 } 512 513 /** 514 * @brief Returns a value from the parameter map 515 * 516 * @param[in] name - The parameter name 517 * 518 * @return The parameter value, or std::nullopt if not found 519 */ 520 static std::optional<PropertyVariantType> 521 getParameter(const std::string& name) 522 { 523 auto it = _parameters.find(name); 524 if (it != _parameters.end()) 525 { 526 return it->second; 527 } 528 529 return std::nullopt; 530 } 531 532 /** 533 * @brief Runs the actions registered to a parameter 534 * trigger with this name. 535 * 536 * @param[in] name - The parameter name 537 */ 538 static void runParameterActions(const std::string& name); 539 540 /** 541 * @brief Adds a parameter trigger 542 * 543 * @param[in] name - The parameter name 544 * @param[in] actions - The actions to run on the trigger 545 */ 546 static void 547 addParameterTrigger(const std::string& name, 548 std::vector<std::unique_ptr<ActionBase>>& actions); 549 550 /* The name of the dump file */ 551 static const std::string dumpFile; 552 553 private: 554 /** 555 * @brief Helper to detect when a property's double contains a NaN 556 * (not-a-number) value. 557 * 558 * @param[in] value - The property to test 559 */ 560 static bool PropertyContainsNan(const PropertyVariantType& value) 561 { 562 return (std::holds_alternative<double>(value) && 563 std::isnan(std::get<double>(value))); 564 } 565 566 /** 567 * @brief Insert managed objects into cache, but filter out properties 568 * containing unwanted NaN (not-a-number) values and properties that 569 * are on D-Bus paths that aren't in an existing Group object. 570 * 571 * @param[in] ref - The map of ManagedObjects to insert into cache 572 */ 573 void insertFilteredObjects(ManagedObjects& ref); 574 575 /* The sdbusplus bus object to use */ 576 sdbusplus::bus::bus& _bus; 577 578 /* The sdeventplus even loop to use */ 579 sdeventplus::Event _event; 580 581 /* The sdbusplus manager object to set the ObjectManager interface */ 582 sdbusplus::server::manager::manager _mgr; 583 584 /* Whether loading the config files is allowed or not */ 585 bool _loadAllowed; 586 587 /* The system's power state determination object */ 588 std::unique_ptr<PowerState> _powerState; 589 590 /* List of profiles configured */ 591 std::map<configKey, std::unique_ptr<Profile>> _profiles; 592 593 /* List of active profiles */ 594 static std::vector<std::string> _activeProfiles; 595 596 /* Subtree map of paths to services of interfaces(with ownership state) */ 597 static std::map< 598 std::string, 599 std::map<std::string, std::pair<bool, std::vector<std::string>>>> 600 _servTree; 601 602 /* Object map of paths to interfaces of properties and their values */ 603 static std::map< 604 std::string, 605 std::map<std::string, std::map<std::string, PropertyVariantType>>> 606 _objects; 607 608 /* List of timers and their data to be processed when expired */ 609 std::vector<std::pair<std::unique_ptr<TimerData>, Timer>> _timers; 610 611 /* Map of signal match strings to a list of signal handler data */ 612 std::unordered_map<std::string, std::vector<SignalData>> _signals; 613 614 /* List of zones configured */ 615 std::map<configKey, std::unique_ptr<Zone>> _zones; 616 617 /* List of events configured */ 618 std::map<configKey, std::unique_ptr<Event>> _events; 619 620 /* The sdeventplus wrapper around sd_event_add_defer to dump debug 621 * data from the event loop after the USR1 signal. */ 622 std::unique_ptr<sdeventplus::source::Defer> debugDumpEventSource; 623 624 /** 625 * @brief A map of parameter names and values that are something 626 * other than just D-Bus property values that other actions 627 * can set and use. 628 */ 629 static std::unordered_map<std::string, PropertyVariantType> _parameters; 630 631 /** 632 * @brief Map of parameter names to the actions to run when their 633 * values change. 634 */ 635 static std::unordered_map<std::string, TriggerActions> _parameterTriggers; 636 637 /** 638 * @brief Callback for power state changes 639 * 640 * @param[in] powerStateOn - Whether the power state is on or not 641 * 642 * Callback function bound to the PowerState object instance to handle each 643 * time the power state changes. 644 */ 645 void powerStateChanged(bool powerStateOn); 646 647 /** 648 * @brief Find the service name for a given path and interface from the 649 * cached dataset 650 * 651 * @param[in] path - Path to get service for 652 * @param[in] intf - Interface to get service for 653 * 654 * @return - The cached service name 655 */ 656 static const std::string& findService(const std::string& path, 657 const std::string& intf); 658 659 /** 660 * @brief Find all the paths for a given service and interface from the 661 * cached dataset 662 * 663 * @param[in] serv - Service name to get paths for 664 * @param[in] intf - Interface to get paths for 665 * 666 * @return - The cached object paths 667 */ 668 std::vector<std::string> findPaths(const std::string& serv, 669 const std::string& intf); 670 671 /** 672 * @brief Parse and set the configured profiles from the profiles JSON file 673 * 674 * Retrieves the optional profiles JSON configuration file, parses it, and 675 * creates a list of configured profiles available to the other 676 * configuration files. These profiles can be used to remove or include 677 * entries within the other configuration files. 678 */ 679 void setProfiles(); 680 681 /** 682 * @brief Callback from debugDumpEventSource to dump debug data 683 */ 684 void dumpDebugData(sdeventplus::source::EventBase&); 685 686 /** 687 * @brief Dump the _objects, _servTree, and _parameters maps to JSON 688 * 689 * @param[out] data - The JSON that will be filled in 690 */ 691 void dumpCache(json& data); 692 693 /** 694 * @brief Add a list of groups to the cache dataset. 695 * 696 * @param[in] groups - The groups to add 697 */ 698 void addGroups(const std::vector<Group>& groups); 699 }; 700 701 } // namespace phosphor::fan::control::json 702