xref: /openbmc/bmcweb/redfish-core/lib/sensors.hpp (revision 9d424669)
1 /*
2 // Copyright (c) 2018 Intel 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 <app.hpp>
19 #include <boost/algorithm/string/predicate.hpp>
20 #include <boost/algorithm/string/split.hpp>
21 #include <boost/container/flat_map.hpp>
22 #include <boost/range/algorithm/replace_copy_if.hpp>
23 #include <dbus_singleton.hpp>
24 #include <registries/privilege_registry.hpp>
25 #include <utils/json_utils.hpp>
26 
27 #include <cmath>
28 #include <utility>
29 #include <variant>
30 
31 namespace redfish
32 {
33 
34 using GetSubTreeType = std::vector<
35     std::pair<std::string,
36               std::vector<std::pair<std::string, std::vector<std::string>>>>>;
37 
38 using SensorVariant =
39     std::variant<int64_t, double, uint32_t, bool, std::string>;
40 
41 using ManagedObjectsVectorType = std::vector<std::pair<
42     sdbusplus::message::object_path,
43     boost::container::flat_map<
44         std::string, boost::container::flat_map<std::string, SensorVariant>>>>;
45 
46 namespace sensors
47 {
48 namespace node
49 {
50 static constexpr std::string_view power = "Power";
51 static constexpr std::string_view sensors = "Sensors";
52 static constexpr std::string_view thermal = "Thermal";
53 } // namespace node
54 
55 namespace dbus
56 {
57 
58 static const boost::container::flat_map<std::string_view,
59                                         std::vector<const char*>>
60     paths = {{node::power,
61               {"/xyz/openbmc_project/sensors/voltage",
62                "/xyz/openbmc_project/sensors/power"}},
63              {node::sensors,
64               {"/xyz/openbmc_project/sensors/power",
65                "/xyz/openbmc_project/sensors/current",
66                "/xyz/openbmc_project/sensors/airflow",
67 #ifdef BMCWEB_NEW_POWERSUBSYSTEM_THERMALSUBSYSTEM
68                "/xyz/openbmc_project/sensors/voltage",
69                "/xyz/openbmc_project/sensors/fan_tach",
70                "/xyz/openbmc_project/sensors/temperature",
71                "/xyz/openbmc_project/sensors/fan_pwm",
72                "/xyz/openbmc_project/sensors/altitude",
73                "/xyz/openbmc_project/sensors/energy",
74 #endif
75                "/xyz/openbmc_project/sensors/utilization"}},
76              {node::thermal,
77               {"/xyz/openbmc_project/sensors/fan_tach",
78                "/xyz/openbmc_project/sensors/temperature",
79                "/xyz/openbmc_project/sensors/fan_pwm"}}};
80 } // namespace dbus
81 
82 inline const char* toReadingType(const std::string& sensorType)
83 {
84     if (sensorType == "voltage")
85     {
86         return "Voltage";
87     }
88     if (sensorType == "power")
89     {
90         return "Power";
91     }
92     if (sensorType == "current")
93     {
94         return "Current";
95     }
96     if (sensorType == "fan_tach")
97     {
98         return "Rotational";
99     }
100     if (sensorType == "temperature")
101     {
102         return "Temperature";
103     }
104     if (sensorType == "fan_pwm" || sensorType == "utilization")
105     {
106         return "Percent";
107     }
108     if (sensorType == "altitude")
109     {
110         return "Altitude";
111     }
112     if (sensorType == "airflow")
113     {
114         return "AirFlow";
115     }
116     if (sensorType == "energy")
117     {
118         return "EnergyJoules";
119     }
120     return "";
121 }
122 
123 inline const char* toReadingUnits(const std::string& sensorType)
124 {
125     if (sensorType == "voltage")
126     {
127         return "V";
128     }
129     if (sensorType == "power")
130     {
131         return "W";
132     }
133     if (sensorType == "current")
134     {
135         return "A";
136     }
137     if (sensorType == "fan_tach")
138     {
139         return "RPM";
140     }
141     if (sensorType == "temperature")
142     {
143         return "Cel";
144     }
145     if (sensorType == "fan_pwm" || sensorType == "utilization")
146     {
147         return "%";
148     }
149     if (sensorType == "altitude")
150     {
151         return "m";
152     }
153     if (sensorType == "airflow")
154     {
155         return "cft_i/min";
156     }
157     if (sensorType == "energy")
158     {
159         return "J";
160     }
161     return "";
162 }
163 } // namespace sensors
164 
165 /**
166  * SensorsAsyncResp
167  * Gathers data needed for response processing after async calls are done
168  */
169 class SensorsAsyncResp
170 {
171   public:
172     using DataCompleteCb = std::function<void(
173         const boost::beast::http::status status,
174         const boost::container::flat_map<std::string, std::string>& uriToDbus)>;
175 
176     struct SensorData
177     {
178         const std::string name;
179         std::string uri;
180         const std::string valueKey;
181         const std::string dbusPath;
182     };
183 
184     SensorsAsyncResp(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
185                      const std::string& chassisIdIn,
186                      const std::vector<const char*>& typesIn,
187                      const std::string_view& subNode) :
188         asyncResp(asyncResp),
189         chassisId(chassisIdIn), types(typesIn), chassisSubNode(subNode)
190     {}
191 
192     // Store extra data about sensor mapping and return it in callback
193     SensorsAsyncResp(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
194                      const std::string& chassisIdIn,
195                      const std::vector<const char*>& typesIn,
196                      const std::string_view& subNode,
197                      DataCompleteCb&& creationComplete) :
198         asyncResp(asyncResp),
199         chassisId(chassisIdIn), types(typesIn),
200         chassisSubNode(subNode), metadata{std::vector<SensorData>()},
201         dataComplete{std::move(creationComplete)}
202     {}
203 
204     ~SensorsAsyncResp()
205     {
206         if (asyncResp->res.result() ==
207             boost::beast::http::status::internal_server_error)
208         {
209             // Reset the json object to clear out any data that made it in
210             // before the error happened todo(ed) handle error condition with
211             // proper code
212             asyncResp->res.jsonValue = nlohmann::json::object();
213         }
214 
215         if (dataComplete && metadata)
216         {
217             boost::container::flat_map<std::string, std::string> map;
218             if (asyncResp->res.result() == boost::beast::http::status::ok)
219             {
220                 for (auto& sensor : *metadata)
221                 {
222                     map.insert(std::make_pair(sensor.uri + sensor.valueKey,
223                                               sensor.dbusPath));
224                 }
225             }
226             dataComplete(asyncResp->res.result(), map);
227         }
228     }
229 
230     void addMetadata(const nlohmann::json& sensorObject,
231                      const std::string& valueKey, const std::string& dbusPath)
232     {
233         if (metadata)
234         {
235             metadata->emplace_back(SensorData{sensorObject["Name"],
236                                               sensorObject["@odata.id"],
237                                               valueKey, dbusPath});
238         }
239     }
240 
241     void updateUri(const std::string& name, const std::string& uri)
242     {
243         if (metadata)
244         {
245             for (auto& sensor : *metadata)
246             {
247                 if (sensor.name == name)
248                 {
249                     sensor.uri = uri;
250                 }
251             }
252         }
253     }
254 
255     const std::shared_ptr<bmcweb::AsyncResp> asyncResp;
256     const std::string chassisId;
257     const std::vector<const char*> types;
258     const std::string chassisSubNode;
259 
260   private:
261     std::optional<std::vector<SensorData>> metadata;
262     DataCompleteCb dataComplete;
263 };
264 
265 /**
266  * Possible states for physical inventory leds
267  */
268 enum class LedState
269 {
270     OFF,
271     ON,
272     BLINK,
273     UNKNOWN
274 };
275 
276 /**
277  * D-Bus inventory item associated with one or more sensors.
278  */
279 class InventoryItem
280 {
281   public:
282     InventoryItem(const std::string& objPath) :
283         objectPath(objPath), name(), isPresent(true), isFunctional(true),
284         isPowerSupply(false), powerSupplyEfficiencyPercent(-1), manufacturer(),
285         model(), partNumber(), serialNumber(), sensors(), ledObjectPath(""),
286         ledState(LedState::UNKNOWN)
287     {
288         // Set inventory item name to last node of object path
289         sdbusplus::message::object_path path(objectPath);
290         name = path.filename();
291         if (name.empty())
292         {
293             BMCWEB_LOG_ERROR << "Failed to find '/' in " << objectPath;
294         }
295     }
296 
297     std::string objectPath;
298     std::string name;
299     bool isPresent;
300     bool isFunctional;
301     bool isPowerSupply;
302     int powerSupplyEfficiencyPercent;
303     std::string manufacturer;
304     std::string model;
305     std::string partNumber;
306     std::string serialNumber;
307     std::set<std::string> sensors;
308     std::string ledObjectPath;
309     LedState ledState;
310 };
311 
312 /**
313  * @brief Get objects with connection necessary for sensors
314  * @param SensorsAsyncResp Pointer to object holding response data
315  * @param sensorNames Sensors retrieved from chassis
316  * @param callback Callback for processing gathered connections
317  */
318 template <typename Callback>
319 void getObjectsWithConnection(
320     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
321     const std::shared_ptr<boost::container::flat_set<std::string>>& sensorNames,
322     Callback&& callback)
323 {
324     BMCWEB_LOG_DEBUG << "getObjectsWithConnection enter";
325     const std::string path = "/xyz/openbmc_project/sensors";
326     const std::array<std::string, 1> interfaces = {
327         "xyz.openbmc_project.Sensor.Value"};
328 
329     // Response handler for parsing objects subtree
330     auto respHandler = [callback{std::move(callback)}, sensorsAsyncResp,
331                         sensorNames](const boost::system::error_code ec,
332                                      const GetSubTreeType& subtree) {
333         BMCWEB_LOG_DEBUG << "getObjectsWithConnection resp_handler enter";
334         if (ec)
335         {
336             messages::internalError(sensorsAsyncResp->asyncResp->res);
337             BMCWEB_LOG_ERROR
338                 << "getObjectsWithConnection resp_handler: Dbus error " << ec;
339             return;
340         }
341 
342         BMCWEB_LOG_DEBUG << "Found " << subtree.size() << " subtrees";
343 
344         // Make unique list of connections only for requested sensor types and
345         // found in the chassis
346         boost::container::flat_set<std::string> connections;
347         std::set<std::pair<std::string, std::string>> objectsWithConnection;
348         // Intrinsic to avoid malloc.  Most systems will have < 8 sensor
349         // producers
350         connections.reserve(8);
351 
352         BMCWEB_LOG_DEBUG << "sensorNames list count: " << sensorNames->size();
353         for (const std::string& tsensor : *sensorNames)
354         {
355             BMCWEB_LOG_DEBUG << "Sensor to find: " << tsensor;
356         }
357 
358         for (const std::pair<
359                  std::string,
360                  std::vector<std::pair<std::string, std::vector<std::string>>>>&
361                  object : subtree)
362         {
363             if (sensorNames->find(object.first) != sensorNames->end())
364             {
365                 for (const std::pair<std::string, std::vector<std::string>>&
366                          objData : object.second)
367                 {
368                     BMCWEB_LOG_DEBUG << "Adding connection: " << objData.first;
369                     connections.insert(objData.first);
370                     objectsWithConnection.insert(
371                         std::make_pair(object.first, objData.first));
372                 }
373             }
374         }
375         BMCWEB_LOG_DEBUG << "Found " << connections.size() << " connections";
376         callback(std::move(connections), std::move(objectsWithConnection));
377         BMCWEB_LOG_DEBUG << "getObjectsWithConnection resp_handler exit";
378     };
379     // Make call to ObjectMapper to find all sensors objects
380     crow::connections::systemBus->async_method_call(
381         std::move(respHandler), "xyz.openbmc_project.ObjectMapper",
382         "/xyz/openbmc_project/object_mapper",
383         "xyz.openbmc_project.ObjectMapper", "GetSubTree", path, 2, interfaces);
384     BMCWEB_LOG_DEBUG << "getObjectsWithConnection exit";
385 }
386 
387 /**
388  * @brief Create connections necessary for sensors
389  * @param SensorsAsyncResp Pointer to object holding response data
390  * @param sensorNames Sensors retrieved from chassis
391  * @param callback Callback for processing gathered connections
392  */
393 template <typename Callback>
394 void getConnections(
395     std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
396     const std::shared_ptr<boost::container::flat_set<std::string>> sensorNames,
397     Callback&& callback)
398 {
399     auto objectsWithConnectionCb =
400         [callback](const boost::container::flat_set<std::string>& connections,
401                    const std::set<std::pair<std::string, std::string>>&
402                    /*objectsWithConnection*/) { callback(connections); };
403     getObjectsWithConnection(sensorsAsyncResp, sensorNames,
404                              std::move(objectsWithConnectionCb));
405 }
406 
407 /**
408  * @brief Shrinks the list of sensors for processing
409  * @param SensorsAysncResp  The class holding the Redfish response
410  * @param allSensors  A list of all the sensors associated to the
411  * chassis element (i.e. baseboard, front panel, etc...)
412  * @param activeSensors A list that is a reduction of the incoming
413  * allSensors list.  Eliminate Thermal sensors when a Power request is
414  * made, and eliminate Power sensors when a Thermal request is made.
415  */
416 inline void reduceSensorList(
417     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
418     const std::vector<std::string>* allSensors,
419     const std::shared_ptr<boost::container::flat_set<std::string>>&
420         activeSensors)
421 {
422     if (sensorsAsyncResp == nullptr)
423     {
424         return;
425     }
426     if ((allSensors == nullptr) || (activeSensors == nullptr))
427     {
428         messages::resourceNotFound(
429             sensorsAsyncResp->asyncResp->res, sensorsAsyncResp->chassisSubNode,
430             sensorsAsyncResp->chassisSubNode == sensors::node::thermal
431                 ? "Temperatures"
432                 : "Voltages");
433 
434         return;
435     }
436     if (allSensors->empty())
437     {
438         // Nothing to do, the activeSensors object is also empty
439         return;
440     }
441 
442     for (const char* type : sensorsAsyncResp->types)
443     {
444         for (const std::string& sensor : *allSensors)
445         {
446             if (boost::starts_with(sensor, type))
447             {
448                 activeSensors->emplace(sensor);
449             }
450         }
451     }
452 }
453 
454 /**
455  * @brief Retrieves valid chassis path
456  * @param asyncResp   Pointer to object holding response data
457  * @param callback  Callback for next step to get valid chassis path
458  */
459 template <typename Callback>
460 void getValidChassisPath(const std::shared_ptr<SensorsAsyncResp>& asyncResp,
461                          Callback&& callback)
462 {
463     BMCWEB_LOG_DEBUG << "checkChassisId enter";
464     const std::array<const char*, 2> interfaces = {
465         "xyz.openbmc_project.Inventory.Item.Board",
466         "xyz.openbmc_project.Inventory.Item.Chassis"};
467 
468     auto respHandler =
469         [callback{std::move(callback)},
470          asyncResp](const boost::system::error_code ec,
471                     const std::vector<std::string>& chassisPaths) mutable {
472             BMCWEB_LOG_DEBUG << "getValidChassisPath respHandler enter";
473             if (ec)
474             {
475                 BMCWEB_LOG_ERROR
476                     << "getValidChassisPath respHandler DBUS error: " << ec;
477                 messages::internalError(asyncResp->asyncResp->res);
478                 return;
479             }
480 
481             std::optional<std::string> chassisPath;
482             std::string chassisName;
483             for (const std::string& chassis : chassisPaths)
484             {
485                 sdbusplus::message::object_path path(chassis);
486                 chassisName = path.filename();
487                 if (chassisName.empty())
488                 {
489                     BMCWEB_LOG_ERROR << "Failed to find '/' in " << chassis;
490                     continue;
491                 }
492                 if (chassisName == asyncResp->chassisId)
493                 {
494                     chassisPath = chassis;
495                     break;
496                 }
497             }
498             callback(chassisPath);
499         };
500 
501     // Get the Chassis Collection
502     crow::connections::systemBus->async_method_call(
503         respHandler, "xyz.openbmc_project.ObjectMapper",
504         "/xyz/openbmc_project/object_mapper",
505         "xyz.openbmc_project.ObjectMapper", "GetSubTreePaths",
506         "/xyz/openbmc_project/inventory", 0, interfaces);
507     BMCWEB_LOG_DEBUG << "checkChassisId exit";
508 }
509 
510 /**
511  * @brief Retrieves requested chassis sensors and redundancy data from DBus .
512  * @param SensorsAsyncResp   Pointer to object holding response data
513  * @param callback  Callback for next step in gathered sensor processing
514  */
515 template <typename Callback>
516 void getChassis(const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
517                 Callback&& callback)
518 {
519     BMCWEB_LOG_DEBUG << "getChassis enter";
520     const std::array<const char*, 2> interfaces = {
521         "xyz.openbmc_project.Inventory.Item.Board",
522         "xyz.openbmc_project.Inventory.Item.Chassis"};
523     auto respHandler = [callback{std::move(callback)}, sensorsAsyncResp](
524                            const boost::system::error_code ec,
525                            const std::vector<std::string>& chassisPaths) {
526         BMCWEB_LOG_DEBUG << "getChassis respHandler enter";
527         if (ec)
528         {
529             BMCWEB_LOG_ERROR << "getChassis respHandler DBUS error: " << ec;
530             messages::internalError(sensorsAsyncResp->asyncResp->res);
531             return;
532         }
533 
534         const std::string* chassisPath = nullptr;
535         std::string chassisName;
536         for (const std::string& chassis : chassisPaths)
537         {
538             sdbusplus::message::object_path path(chassis);
539             chassisName = path.filename();
540             if (chassisName.empty())
541             {
542                 BMCWEB_LOG_ERROR << "Failed to find '/' in " << chassis;
543                 continue;
544             }
545             if (chassisName == sensorsAsyncResp->chassisId)
546             {
547                 chassisPath = &chassis;
548                 break;
549             }
550         }
551         if (chassisPath == nullptr)
552         {
553             messages::resourceNotFound(sensorsAsyncResp->asyncResp->res,
554                                        "Chassis", sensorsAsyncResp->chassisId);
555             return;
556         }
557 
558         const std::string& chassisSubNode = sensorsAsyncResp->chassisSubNode;
559         if (chassisSubNode == sensors::node::power)
560         {
561             sensorsAsyncResp->asyncResp->res.jsonValue["@odata.type"] =
562                 "#Power.v1_5_2.Power";
563         }
564         else if (chassisSubNode == sensors::node::thermal)
565         {
566             sensorsAsyncResp->asyncResp->res.jsonValue["@odata.type"] =
567                 "#Thermal.v1_4_0.Thermal";
568             sensorsAsyncResp->asyncResp->res.jsonValue["Fans"] =
569                 nlohmann::json::array();
570             sensorsAsyncResp->asyncResp->res.jsonValue["Temperatures"] =
571                 nlohmann::json::array();
572         }
573         else if (chassisSubNode == sensors::node::sensors)
574         {
575             sensorsAsyncResp->asyncResp->res.jsonValue["@odata.type"] =
576                 "#SensorCollection.SensorCollection";
577             sensorsAsyncResp->asyncResp->res.jsonValue["Description"] =
578                 "Collection of Sensors for this Chassis";
579             sensorsAsyncResp->asyncResp->res.jsonValue["Members"] =
580                 nlohmann::json::array();
581             sensorsAsyncResp->asyncResp->res.jsonValue["Members@odata.count"] =
582                 0;
583         }
584 
585         if (chassisSubNode != sensors::node::sensors)
586         {
587             sensorsAsyncResp->asyncResp->res.jsonValue["Id"] = chassisSubNode;
588         }
589 
590         sensorsAsyncResp->asyncResp->res.jsonValue["@odata.id"] =
591             "/redfish/v1/Chassis/" + sensorsAsyncResp->chassisId + "/" +
592             chassisSubNode;
593         sensorsAsyncResp->asyncResp->res.jsonValue["Name"] = chassisSubNode;
594         // Get the list of all sensors for this Chassis element
595         std::string sensorPath = *chassisPath + "/all_sensors";
596         crow::connections::systemBus->async_method_call(
597             [sensorsAsyncResp, callback{std::move(callback)}](
598                 const boost::system::error_code& e,
599                 const std::variant<std::vector<std::string>>&
600                     variantEndpoints) {
601                 if (e)
602                 {
603                     if (e.value() != EBADR)
604                     {
605                         messages::internalError(
606                             sensorsAsyncResp->asyncResp->res);
607                         return;
608                     }
609                 }
610                 const std::vector<std::string>* nodeSensorList =
611                     std::get_if<std::vector<std::string>>(&(variantEndpoints));
612                 if (nodeSensorList == nullptr)
613                 {
614                     messages::resourceNotFound(
615                         sensorsAsyncResp->asyncResp->res,
616                         sensorsAsyncResp->chassisSubNode,
617                         sensorsAsyncResp->chassisSubNode ==
618                                 sensors::node::thermal
619                             ? "Temperatures"
620                         : sensorsAsyncResp->chassisSubNode ==
621                                 sensors::node::power
622                             ? "Voltages"
623                             : "Sensors");
624                     return;
625                 }
626                 const std::shared_ptr<boost::container::flat_set<std::string>>
627                     culledSensorList = std::make_shared<
628                         boost::container::flat_set<std::string>>();
629                 reduceSensorList(sensorsAsyncResp, nodeSensorList,
630                                  culledSensorList);
631                 callback(culledSensorList);
632             },
633             "xyz.openbmc_project.ObjectMapper", sensorPath,
634             "org.freedesktop.DBus.Properties", "Get",
635             "xyz.openbmc_project.Association", "endpoints");
636     };
637 
638     // Get the Chassis Collection
639     crow::connections::systemBus->async_method_call(
640         respHandler, "xyz.openbmc_project.ObjectMapper",
641         "/xyz/openbmc_project/object_mapper",
642         "xyz.openbmc_project.ObjectMapper", "GetSubTreePaths",
643         "/xyz/openbmc_project/inventory", 0, interfaces);
644     BMCWEB_LOG_DEBUG << "getChassis exit";
645 }
646 
647 /**
648  * @brief Finds all DBus object paths that implement ObjectManager.
649  *
650  * Creates a mapping from the associated connection name to the object path.
651  *
652  * Finds the object paths asynchronously.  Invokes callback when information has
653  * been obtained.
654  *
655  * The callback must have the following signature:
656  *   @code
657  *   callback(std::shared_ptr<boost::container::flat_map<std::string,
658  *                std::string>> objectMgrPaths)
659  *   @endcode
660  *
661  * @param sensorsAsyncResp Pointer to object holding response data.
662  * @param callback Callback to invoke when object paths obtained.
663  */
664 template <typename Callback>
665 void getObjectManagerPaths(
666     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
667     Callback&& callback)
668 {
669     BMCWEB_LOG_DEBUG << "getObjectManagerPaths enter";
670     const std::array<std::string, 1> interfaces = {
671         "org.freedesktop.DBus.ObjectManager"};
672 
673     // Response handler for GetSubTree DBus method
674     auto respHandler = [callback{std::move(callback)},
675                         sensorsAsyncResp](const boost::system::error_code ec,
676                                           const GetSubTreeType& subtree) {
677         BMCWEB_LOG_DEBUG << "getObjectManagerPaths respHandler enter";
678         if (ec)
679         {
680             messages::internalError(sensorsAsyncResp->asyncResp->res);
681             BMCWEB_LOG_ERROR << "getObjectManagerPaths respHandler: DBus error "
682                              << ec;
683             return;
684         }
685 
686         // Loop over returned object paths
687         std::shared_ptr<boost::container::flat_map<std::string, std::string>>
688             objectMgrPaths = std::make_shared<
689                 boost::container::flat_map<std::string, std::string>>();
690         for (const std::pair<
691                  std::string,
692                  std::vector<std::pair<std::string, std::vector<std::string>>>>&
693                  object : subtree)
694         {
695             // Loop over connections for current object path
696             const std::string& objectPath = object.first;
697             for (const std::pair<std::string, std::vector<std::string>>&
698                      objData : object.second)
699             {
700                 // Add mapping from connection to object path
701                 const std::string& connection = objData.first;
702                 (*objectMgrPaths)[connection] = objectPath;
703                 BMCWEB_LOG_DEBUG << "Added mapping " << connection << " -> "
704                                  << objectPath;
705             }
706         }
707         callback(objectMgrPaths);
708         BMCWEB_LOG_DEBUG << "getObjectManagerPaths respHandler exit";
709     };
710 
711     // Query mapper for all DBus object paths that implement ObjectManager
712     crow::connections::systemBus->async_method_call(
713         std::move(respHandler), "xyz.openbmc_project.ObjectMapper",
714         "/xyz/openbmc_project/object_mapper",
715         "xyz.openbmc_project.ObjectMapper", "GetSubTree", "/", 0, interfaces);
716     BMCWEB_LOG_DEBUG << "getObjectManagerPaths exit";
717 }
718 
719 /**
720  * @brief Returns the Redfish State value for the specified inventory item.
721  * @param inventoryItem D-Bus inventory item associated with a sensor.
722  * @return State value for inventory item.
723  */
724 inline std::string getState(const InventoryItem* inventoryItem)
725 {
726     if ((inventoryItem != nullptr) && !(inventoryItem->isPresent))
727     {
728         return "Absent";
729     }
730 
731     return "Enabled";
732 }
733 
734 /**
735  * @brief Returns the Redfish Health value for the specified sensor.
736  * @param sensorJson Sensor JSON object.
737  * @param interfacesDict Map of all sensor interfaces.
738  * @param inventoryItem D-Bus inventory item associated with the sensor.  Will
739  * be nullptr if no associated inventory item was found.
740  * @return Health value for sensor.
741  */
742 inline std::string getHealth(
743     nlohmann::json& sensorJson,
744     const boost::container::flat_map<
745         std::string, boost::container::flat_map<std::string, SensorVariant>>&
746         interfacesDict,
747     const InventoryItem* inventoryItem)
748 {
749     // Get current health value (if any) in the sensor JSON object.  Some JSON
750     // objects contain multiple sensors (such as PowerSupplies).  We want to set
751     // the overall health to be the most severe of any of the sensors.
752     std::string currentHealth;
753     auto statusIt = sensorJson.find("Status");
754     if (statusIt != sensorJson.end())
755     {
756         auto healthIt = statusIt->find("Health");
757         if (healthIt != statusIt->end())
758         {
759             std::string* health = healthIt->get_ptr<std::string*>();
760             if (health != nullptr)
761             {
762                 currentHealth = *health;
763             }
764         }
765     }
766 
767     // If current health in JSON object is already Critical, return that.  This
768     // should override the sensor health, which might be less severe.
769     if (currentHealth == "Critical")
770     {
771         return "Critical";
772     }
773 
774     // Check if sensor has critical threshold alarm
775     auto criticalThresholdIt =
776         interfacesDict.find("xyz.openbmc_project.Sensor.Threshold.Critical");
777     if (criticalThresholdIt != interfacesDict.end())
778     {
779         auto thresholdHighIt =
780             criticalThresholdIt->second.find("CriticalAlarmHigh");
781         auto thresholdLowIt =
782             criticalThresholdIt->second.find("CriticalAlarmLow");
783         if (thresholdHighIt != criticalThresholdIt->second.end())
784         {
785             const bool* asserted = std::get_if<bool>(&thresholdHighIt->second);
786             if (asserted == nullptr)
787             {
788                 BMCWEB_LOG_ERROR << "Illegal sensor threshold";
789             }
790             else if (*asserted)
791             {
792                 return "Critical";
793             }
794         }
795         if (thresholdLowIt != criticalThresholdIt->second.end())
796         {
797             const bool* asserted = std::get_if<bool>(&thresholdLowIt->second);
798             if (asserted == nullptr)
799             {
800                 BMCWEB_LOG_ERROR << "Illegal sensor threshold";
801             }
802             else if (*asserted)
803             {
804                 return "Critical";
805             }
806         }
807     }
808 
809     // Check if associated inventory item is not functional
810     if ((inventoryItem != nullptr) && !(inventoryItem->isFunctional))
811     {
812         return "Critical";
813     }
814 
815     // If current health in JSON object is already Warning, return that.  This
816     // should override the sensor status, which might be less severe.
817     if (currentHealth == "Warning")
818     {
819         return "Warning";
820     }
821 
822     // Check if sensor has warning threshold alarm
823     auto warningThresholdIt =
824         interfacesDict.find("xyz.openbmc_project.Sensor.Threshold.Warning");
825     if (warningThresholdIt != interfacesDict.end())
826     {
827         auto thresholdHighIt =
828             warningThresholdIt->second.find("WarningAlarmHigh");
829         auto thresholdLowIt =
830             warningThresholdIt->second.find("WarningAlarmLow");
831         if (thresholdHighIt != warningThresholdIt->second.end())
832         {
833             const bool* asserted = std::get_if<bool>(&thresholdHighIt->second);
834             if (asserted == nullptr)
835             {
836                 BMCWEB_LOG_ERROR << "Illegal sensor threshold";
837             }
838             else if (*asserted)
839             {
840                 return "Warning";
841             }
842         }
843         if (thresholdLowIt != warningThresholdIt->second.end())
844         {
845             const bool* asserted = std::get_if<bool>(&thresholdLowIt->second);
846             if (asserted == nullptr)
847             {
848                 BMCWEB_LOG_ERROR << "Illegal sensor threshold";
849             }
850             else if (*asserted)
851             {
852                 return "Warning";
853             }
854         }
855     }
856 
857     return "OK";
858 }
859 
860 inline void setLedState(nlohmann::json& sensorJson,
861                         const InventoryItem* inventoryItem)
862 {
863     if (inventoryItem != nullptr && !inventoryItem->ledObjectPath.empty())
864     {
865         switch (inventoryItem->ledState)
866         {
867             case LedState::OFF:
868                 sensorJson["IndicatorLED"] = "Off";
869                 break;
870             case LedState::ON:
871                 sensorJson["IndicatorLED"] = "Lit";
872                 break;
873             case LedState::BLINK:
874                 sensorJson["IndicatorLED"] = "Blinking";
875                 break;
876             case LedState::UNKNOWN:
877                 break;
878         }
879     }
880 }
881 
882 /**
883  * @brief Builds a json sensor representation of a sensor.
884  * @param sensorName  The name of the sensor to be built
885  * @param sensorType  The type (temperature, fan_tach, etc) of the sensor to
886  * build
887  * @param sensorsAsyncResp  Sensor metadata
888  * @param interfacesDict  A dictionary of the interfaces and properties of said
889  * interfaces to be built from
890  * @param sensor_json  The json object to fill
891  * @param inventoryItem D-Bus inventory item associated with the sensor.  Will
892  * be nullptr if no associated inventory item was found.
893  */
894 inline void objectInterfacesToJson(
895     const std::string& sensorName, const std::string& sensorType,
896     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
897     const boost::container::flat_map<
898         std::string, boost::container::flat_map<std::string, SensorVariant>>&
899         interfacesDict,
900     nlohmann::json& sensorJson, InventoryItem* inventoryItem)
901 {
902     // We need a value interface before we can do anything with it
903     auto valueIt = interfacesDict.find("xyz.openbmc_project.Sensor.Value");
904     if (valueIt == interfacesDict.end())
905     {
906         BMCWEB_LOG_ERROR << "Sensor doesn't have a value interface";
907         return;
908     }
909 
910     // Assume values exist as is (10^0 == 1) if no scale exists
911     int64_t scaleMultiplier = 0;
912 
913     auto scaleIt = valueIt->second.find("Scale");
914     // If a scale exists, pull value as int64, and use the scaling.
915     if (scaleIt != valueIt->second.end())
916     {
917         const int64_t* int64Value = std::get_if<int64_t>(&scaleIt->second);
918         if (int64Value != nullptr)
919         {
920             scaleMultiplier = *int64Value;
921         }
922     }
923 
924     if (sensorsAsyncResp->chassisSubNode == sensors::node::sensors)
925     {
926         // For sensors in SensorCollection we set Id instead of MemberId,
927         // including power sensors.
928         sensorJson["Id"] = sensorName;
929         sensorJson["Name"] = boost::replace_all_copy(sensorName, "_", " ");
930     }
931     else if (sensorType != "power")
932     {
933         // Set MemberId and Name for non-power sensors.  For PowerSupplies and
934         // PowerControl, those properties have more general values because
935         // multiple sensors can be stored in the same JSON object.
936         sensorJson["MemberId"] = sensorName;
937         sensorJson["Name"] = boost::replace_all_copy(sensorName, "_", " ");
938     }
939 
940     sensorJson["Status"]["State"] = getState(inventoryItem);
941     sensorJson["Status"]["Health"] =
942         getHealth(sensorJson, interfacesDict, inventoryItem);
943 
944     // Parameter to set to override the type we get from dbus, and force it to
945     // int, regardless of what is available.  This is used for schemas like fan,
946     // that require integers, not floats.
947     bool forceToInt = false;
948 
949     nlohmann::json::json_pointer unit("/Reading");
950     if (sensorsAsyncResp->chassisSubNode == sensors::node::sensors)
951     {
952         sensorJson["@odata.type"] = "#Sensor.v1_0_0.Sensor";
953 
954         const std::string& readingType = sensors::toReadingType(sensorType);
955         if (readingType.empty())
956         {
957             BMCWEB_LOG_ERROR << "Redfish cannot map reading type for "
958                              << sensorType;
959         }
960         else
961         {
962             sensorJson["ReadingType"] = readingType;
963         }
964 
965         const std::string& readingUnits = sensors::toReadingUnits(sensorType);
966         if (readingUnits.empty())
967         {
968             BMCWEB_LOG_ERROR << "Redfish cannot map reading unit for "
969                              << sensorType;
970         }
971         else
972         {
973             sensorJson["ReadingUnits"] = readingUnits;
974         }
975     }
976     else if (sensorType == "temperature")
977     {
978         unit = "/ReadingCelsius"_json_pointer;
979         sensorJson["@odata.type"] = "#Thermal.v1_3_0.Temperature";
980         // TODO(ed) Documentation says that path should be type fan_tach,
981         // implementation seems to implement fan
982     }
983     else if (sensorType == "fan" || sensorType == "fan_tach")
984     {
985         unit = "/Reading"_json_pointer;
986         sensorJson["ReadingUnits"] = "RPM";
987         sensorJson["@odata.type"] = "#Thermal.v1_3_0.Fan";
988         setLedState(sensorJson, inventoryItem);
989         forceToInt = true;
990     }
991     else if (sensorType == "fan_pwm")
992     {
993         unit = "/Reading"_json_pointer;
994         sensorJson["ReadingUnits"] = "Percent";
995         sensorJson["@odata.type"] = "#Thermal.v1_3_0.Fan";
996         setLedState(sensorJson, inventoryItem);
997         forceToInt = true;
998     }
999     else if (sensorType == "voltage")
1000     {
1001         unit = "/ReadingVolts"_json_pointer;
1002         sensorJson["@odata.type"] = "#Power.v1_0_0.Voltage";
1003     }
1004     else if (sensorType == "power")
1005     {
1006         std::string sensorNameLower =
1007             boost::algorithm::to_lower_copy(sensorName);
1008 
1009         if (!sensorName.compare("total_power"))
1010         {
1011             sensorJson["@odata.type"] = "#Power.v1_0_0.PowerControl";
1012             // Put multiple "sensors" into a single PowerControl, so have
1013             // generic names for MemberId and Name. Follows Redfish mockup.
1014             sensorJson["MemberId"] = "0";
1015             sensorJson["Name"] = "Chassis Power Control";
1016             unit = "/PowerConsumedWatts"_json_pointer;
1017         }
1018         else if (sensorNameLower.find("input") != std::string::npos)
1019         {
1020             unit = "/PowerInputWatts"_json_pointer;
1021         }
1022         else
1023         {
1024             unit = "/PowerOutputWatts"_json_pointer;
1025         }
1026     }
1027     else
1028     {
1029         BMCWEB_LOG_ERROR << "Redfish cannot map object type for " << sensorName;
1030         return;
1031     }
1032     // Map of dbus interface name, dbus property name and redfish property_name
1033     std::vector<
1034         std::tuple<const char*, const char*, nlohmann::json::json_pointer>>
1035         properties;
1036     properties.reserve(7);
1037 
1038     properties.emplace_back("xyz.openbmc_project.Sensor.Value", "Value", unit);
1039 
1040     if (sensorsAsyncResp->chassisSubNode == sensors::node::sensors)
1041     {
1042         properties.emplace_back(
1043             "xyz.openbmc_project.Sensor.Threshold.Warning", "WarningHigh",
1044             "/Thresholds/UpperCaution/Reading"_json_pointer);
1045         properties.emplace_back(
1046             "xyz.openbmc_project.Sensor.Threshold.Warning", "WarningLow",
1047             "/Thresholds/LowerCaution/Reading"_json_pointer);
1048         properties.emplace_back(
1049             "xyz.openbmc_project.Sensor.Threshold.Critical", "CriticalHigh",
1050             "/Thresholds/UpperCritical/Reading"_json_pointer);
1051         properties.emplace_back(
1052             "xyz.openbmc_project.Sensor.Threshold.Critical", "CriticalLow",
1053             "/Thresholds/LowerCritical/Reading"_json_pointer);
1054     }
1055     else if (sensorType != "power")
1056     {
1057         properties.emplace_back("xyz.openbmc_project.Sensor.Threshold.Warning",
1058                                 "WarningHigh",
1059                                 "/UpperThresholdNonCritical"_json_pointer);
1060         properties.emplace_back("xyz.openbmc_project.Sensor.Threshold.Warning",
1061                                 "WarningLow",
1062                                 "/LowerThresholdNonCritical"_json_pointer);
1063         properties.emplace_back("xyz.openbmc_project.Sensor.Threshold.Critical",
1064                                 "CriticalHigh",
1065                                 "/UpperThresholdCritical"_json_pointer);
1066         properties.emplace_back("xyz.openbmc_project.Sensor.Threshold.Critical",
1067                                 "CriticalLow",
1068                                 "/LowerThresholdCritical"_json_pointer);
1069     }
1070 
1071     // TODO Need to get UpperThresholdFatal and LowerThresholdFatal
1072 
1073     if (sensorsAsyncResp->chassisSubNode == sensors::node::sensors)
1074     {
1075         properties.emplace_back("xyz.openbmc_project.Sensor.Value", "MinValue",
1076                                 "/ReadingRangeMin"_json_pointer);
1077         properties.emplace_back("xyz.openbmc_project.Sensor.Value", "MaxValue",
1078                                 "/ReadingRangeMax"_json_pointer);
1079     }
1080     else if (sensorType == "temperature")
1081     {
1082         properties.emplace_back("xyz.openbmc_project.Sensor.Value", "MinValue",
1083                                 "/MinReadingRangeTemp"_json_pointer);
1084         properties.emplace_back("xyz.openbmc_project.Sensor.Value", "MaxValue",
1085                                 "/MaxReadingRangeTemp"_json_pointer);
1086     }
1087     else if (sensorType != "power")
1088     {
1089         properties.emplace_back("xyz.openbmc_project.Sensor.Value", "MinValue",
1090                                 "/MinReadingRange"_json_pointer);
1091         properties.emplace_back("xyz.openbmc_project.Sensor.Value", "MaxValue",
1092                                 "/MaxReadingRange"_json_pointer);
1093     }
1094 
1095     for (const std::tuple<const char*, const char*,
1096                           nlohmann::json::json_pointer>& p : properties)
1097     {
1098         auto interfaceProperties = interfacesDict.find(std::get<0>(p));
1099         if (interfaceProperties != interfacesDict.end())
1100         {
1101             auto thisValueIt = interfaceProperties->second.find(std::get<1>(p));
1102             if (thisValueIt != interfaceProperties->second.end())
1103             {
1104                 const SensorVariant& valueVariant = thisValueIt->second;
1105 
1106                 // The property we want to set may be nested json, so use
1107                 // a json_pointer for easy indexing into the json structure.
1108                 const nlohmann::json::json_pointer& key = std::get<2>(p);
1109 
1110                 // Attempt to pull the int64 directly
1111                 const int64_t* int64Value = std::get_if<int64_t>(&valueVariant);
1112 
1113                 const double* doubleValue = std::get_if<double>(&valueVariant);
1114                 const uint32_t* uValue = std::get_if<uint32_t>(&valueVariant);
1115                 double temp = 0.0;
1116                 if (int64Value != nullptr)
1117                 {
1118                     temp = static_cast<double>(*int64Value);
1119                 }
1120                 else if (doubleValue != nullptr)
1121                 {
1122                     temp = *doubleValue;
1123                 }
1124                 else if (uValue != nullptr)
1125                 {
1126                     temp = *uValue;
1127                 }
1128                 else
1129                 {
1130                     BMCWEB_LOG_ERROR
1131                         << "Got value interface that wasn't int or double";
1132                     continue;
1133                 }
1134                 temp = temp * std::pow(10, scaleMultiplier);
1135                 if (forceToInt)
1136                 {
1137                     sensorJson[key] = static_cast<int64_t>(temp);
1138                 }
1139                 else
1140                 {
1141                     sensorJson[key] = temp;
1142                 }
1143             }
1144         }
1145     }
1146 
1147     sensorsAsyncResp->addMetadata(sensorJson, unit.to_string(),
1148                                   "/xyz/openbmc_project/sensors/" + sensorType +
1149                                       "/" + sensorName);
1150 
1151     BMCWEB_LOG_DEBUG << "Added sensor " << sensorName;
1152 }
1153 
1154 inline void populateFanRedundancy(
1155     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp)
1156 {
1157     crow::connections::systemBus->async_method_call(
1158         [sensorsAsyncResp](const boost::system::error_code ec,
1159                            const GetSubTreeType& resp) {
1160             if (ec)
1161             {
1162                 return; // don't have to have this interface
1163             }
1164             for (const std::pair<std::string,
1165                                  std::vector<std::pair<
1166                                      std::string, std::vector<std::string>>>>&
1167                      pathPair : resp)
1168             {
1169                 const std::string& path = pathPair.first;
1170                 const std::vector<
1171                     std::pair<std::string, std::vector<std::string>>>& objDict =
1172                     pathPair.second;
1173                 if (objDict.empty())
1174                 {
1175                     continue; // this should be impossible
1176                 }
1177 
1178                 const std::string& owner = objDict.begin()->first;
1179                 crow::connections::systemBus->async_method_call(
1180                     [path, owner,
1181                      sensorsAsyncResp](const boost::system::error_code e,
1182                                        std::variant<std::vector<std::string>>
1183                                            variantEndpoints) {
1184                         if (e)
1185                         {
1186                             return; // if they don't have an association we
1187                                     // can't tell what chassis is
1188                         }
1189                         // verify part of the right chassis
1190                         auto endpoints = std::get_if<std::vector<std::string>>(
1191                             &variantEndpoints);
1192 
1193                         if (endpoints == nullptr)
1194                         {
1195                             BMCWEB_LOG_ERROR << "Invalid association interface";
1196                             messages::internalError(
1197                                 sensorsAsyncResp->asyncResp->res);
1198                             return;
1199                         }
1200 
1201                         auto found = std::find_if(
1202                             endpoints->begin(), endpoints->end(),
1203                             [sensorsAsyncResp](const std::string& entry) {
1204                                 return entry.find(
1205                                            sensorsAsyncResp->chassisId) !=
1206                                        std::string::npos;
1207                             });
1208 
1209                         if (found == endpoints->end())
1210                         {
1211                             return;
1212                         }
1213                         crow::connections::systemBus->async_method_call(
1214                             [path, sensorsAsyncResp](
1215                                 const boost::system::error_code& err,
1216                                 const boost::container::flat_map<
1217                                     std::string,
1218                                     std::variant<uint8_t,
1219                                                  std::vector<std::string>,
1220                                                  std::string>>& ret) {
1221                                 if (err)
1222                                 {
1223                                     return; // don't have to have this
1224                                             // interface
1225                                 }
1226                                 auto findFailures = ret.find("AllowedFailures");
1227                                 auto findCollection = ret.find("Collection");
1228                                 auto findStatus = ret.find("Status");
1229 
1230                                 if (findFailures == ret.end() ||
1231                                     findCollection == ret.end() ||
1232                                     findStatus == ret.end())
1233                                 {
1234                                     BMCWEB_LOG_ERROR
1235                                         << "Invalid redundancy interface";
1236                                     messages::internalError(
1237                                         sensorsAsyncResp->asyncResp->res);
1238                                     return;
1239                                 }
1240 
1241                                 auto allowedFailures = std::get_if<uint8_t>(
1242                                     &(findFailures->second));
1243                                 auto collection =
1244                                     std::get_if<std::vector<std::string>>(
1245                                         &(findCollection->second));
1246                                 auto status = std::get_if<std::string>(
1247                                     &(findStatus->second));
1248 
1249                                 if (allowedFailures == nullptr ||
1250                                     collection == nullptr || status == nullptr)
1251                                 {
1252 
1253                                     BMCWEB_LOG_ERROR
1254                                         << "Invalid redundancy interface "
1255                                            "types";
1256                                     messages::internalError(
1257                                         sensorsAsyncResp->asyncResp->res);
1258                                     return;
1259                                 }
1260                                 sdbusplus::message::object_path objectPath(
1261                                     path);
1262                                 std::string name = objectPath.filename();
1263                                 if (name.empty())
1264                                 {
1265                                     // this should be impossible
1266                                     messages::internalError(
1267                                         sensorsAsyncResp->asyncResp->res);
1268                                     return;
1269                                 }
1270                                 std::replace(name.begin(), name.end(), '_',
1271                                              ' ');
1272 
1273                                 std::string health;
1274 
1275                                 if (boost::ends_with(*status, "Full"))
1276                                 {
1277                                     health = "OK";
1278                                 }
1279                                 else if (boost::ends_with(*status, "Degraded"))
1280                                 {
1281                                     health = "Warning";
1282                                 }
1283                                 else
1284                                 {
1285                                     health = "Critical";
1286                                 }
1287                                 std::vector<nlohmann::json> redfishCollection;
1288                                 const auto& fanRedfish =
1289                                     sensorsAsyncResp->asyncResp->res
1290                                         .jsonValue["Fans"];
1291                                 for (const std::string& item : *collection)
1292                                 {
1293                                     sdbusplus::message::object_path path(item);
1294                                     std::string itemName = path.filename();
1295                                     if (itemName.empty())
1296                                     {
1297                                         continue;
1298                                     }
1299                                     /*
1300                                     todo(ed): merge patch that fixes the names
1301                                     std::replace(itemName.begin(),
1302                                                  itemName.end(), '_', ' ');*/
1303                                     auto schemaItem = std::find_if(
1304                                         fanRedfish.begin(), fanRedfish.end(),
1305                                         [itemName](const nlohmann::json& fan) {
1306                                             return fan["MemberId"] == itemName;
1307                                         });
1308                                     if (schemaItem != fanRedfish.end())
1309                                     {
1310                                         redfishCollection.push_back(
1311                                             {{"@odata.id",
1312                                               (*schemaItem)["@odata.id"]}});
1313                                     }
1314                                     else
1315                                     {
1316                                         BMCWEB_LOG_ERROR
1317                                             << "failed to find fan in schema";
1318                                         messages::internalError(
1319                                             sensorsAsyncResp->asyncResp->res);
1320                                         return;
1321                                     }
1322                                 }
1323 
1324                                 size_t minNumNeeded =
1325                                     collection->size() > 0
1326                                         ? collection->size() - *allowedFailures
1327                                         : 0;
1328                                 nlohmann::json& jResp =
1329                                     sensorsAsyncResp->asyncResp->res
1330                                         .jsonValue["Redundancy"];
1331                                 jResp.push_back(
1332                                     {{"@odata.id",
1333                                       "/redfish/v1/Chassis/" +
1334                                           sensorsAsyncResp->chassisId + "/" +
1335                                           sensorsAsyncResp->chassisSubNode +
1336                                           "#/Redundancy/" +
1337                                           std::to_string(jResp.size())},
1338                                      {"@odata.type",
1339                                       "#Redundancy.v1_3_2.Redundancy"},
1340                                      {"MinNumNeeded", minNumNeeded},
1341                                      {"MemberId", name},
1342                                      {"Mode", "N+m"},
1343                                      {"Name", name},
1344                                      {"RedundancySet", redfishCollection},
1345                                      {"Status",
1346                                       {{"Health", health},
1347                                        {"State", "Enabled"}}}});
1348                             },
1349                             owner, path, "org.freedesktop.DBus.Properties",
1350                             "GetAll",
1351                             "xyz.openbmc_project.Control.FanRedundancy");
1352                     },
1353                     "xyz.openbmc_project.ObjectMapper", path + "/chassis",
1354                     "org.freedesktop.DBus.Properties", "Get",
1355                     "xyz.openbmc_project.Association", "endpoints");
1356             }
1357         },
1358         "xyz.openbmc_project.ObjectMapper",
1359         "/xyz/openbmc_project/object_mapper",
1360         "xyz.openbmc_project.ObjectMapper", "GetSubTree",
1361         "/xyz/openbmc_project/control", 2,
1362         std::array<const char*, 1>{
1363             "xyz.openbmc_project.Control.FanRedundancy"});
1364 }
1365 
1366 inline void
1367     sortJSONResponse(const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp)
1368 {
1369     nlohmann::json& response = sensorsAsyncResp->asyncResp->res.jsonValue;
1370     std::array<std::string, 2> sensorHeaders{"Temperatures", "Fans"};
1371     if (sensorsAsyncResp->chassisSubNode == sensors::node::power)
1372     {
1373         sensorHeaders = {"Voltages", "PowerSupplies"};
1374     }
1375     for (const std::string& sensorGroup : sensorHeaders)
1376     {
1377         nlohmann::json::iterator entry = response.find(sensorGroup);
1378         if (entry != response.end())
1379         {
1380             std::sort(entry->begin(), entry->end(),
1381                       [](nlohmann::json& c1, nlohmann::json& c2) {
1382                           return c1["Name"] < c2["Name"];
1383                       });
1384 
1385             // add the index counts to the end of each entry
1386             size_t count = 0;
1387             for (nlohmann::json& sensorJson : *entry)
1388             {
1389                 nlohmann::json::iterator odata = sensorJson.find("@odata.id");
1390                 if (odata == sensorJson.end())
1391                 {
1392                     continue;
1393                 }
1394                 std::string* value = odata->get_ptr<std::string*>();
1395                 if (value != nullptr)
1396                 {
1397                     *value += std::to_string(count);
1398                     count++;
1399                     sensorsAsyncResp->updateUri(sensorJson["Name"], *value);
1400                 }
1401             }
1402         }
1403     }
1404 }
1405 
1406 /**
1407  * @brief Finds the inventory item with the specified object path.
1408  * @param inventoryItems D-Bus inventory items associated with sensors.
1409  * @param invItemObjPath D-Bus object path of inventory item.
1410  * @return Inventory item within vector, or nullptr if no match found.
1411  */
1412 inline InventoryItem* findInventoryItem(
1413     const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
1414     const std::string& invItemObjPath)
1415 {
1416     for (InventoryItem& inventoryItem : *inventoryItems)
1417     {
1418         if (inventoryItem.objectPath == invItemObjPath)
1419         {
1420             return &inventoryItem;
1421         }
1422     }
1423     return nullptr;
1424 }
1425 
1426 /**
1427  * @brief Finds the inventory item associated with the specified sensor.
1428  * @param inventoryItems D-Bus inventory items associated with sensors.
1429  * @param sensorObjPath D-Bus object path of sensor.
1430  * @return Inventory item within vector, or nullptr if no match found.
1431  */
1432 inline InventoryItem* findInventoryItemForSensor(
1433     const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
1434     const std::string& sensorObjPath)
1435 {
1436     for (InventoryItem& inventoryItem : *inventoryItems)
1437     {
1438         if (inventoryItem.sensors.count(sensorObjPath) > 0)
1439         {
1440             return &inventoryItem;
1441         }
1442     }
1443     return nullptr;
1444 }
1445 
1446 /**
1447  * @brief Finds the inventory item associated with the specified led path.
1448  * @param inventoryItems D-Bus inventory items associated with sensors.
1449  * @param ledObjPath D-Bus object path of led.
1450  * @return Inventory item within vector, or nullptr if no match found.
1451  */
1452 inline InventoryItem*
1453     findInventoryItemForLed(std::vector<InventoryItem>& inventoryItems,
1454                             const std::string& ledObjPath)
1455 {
1456     for (InventoryItem& inventoryItem : inventoryItems)
1457     {
1458         if (inventoryItem.ledObjectPath == ledObjPath)
1459         {
1460             return &inventoryItem;
1461         }
1462     }
1463     return nullptr;
1464 }
1465 
1466 /**
1467  * @brief Adds inventory item and associated sensor to specified vector.
1468  *
1469  * Adds a new InventoryItem to the vector if necessary.  Searches for an
1470  * existing InventoryItem with the specified object path.  If not found, one is
1471  * added to the vector.
1472  *
1473  * Next, the specified sensor is added to the set of sensors associated with the
1474  * InventoryItem.
1475  *
1476  * @param inventoryItems D-Bus inventory items associated with sensors.
1477  * @param invItemObjPath D-Bus object path of inventory item.
1478  * @param sensorObjPath D-Bus object path of sensor
1479  */
1480 inline void addInventoryItem(
1481     const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
1482     const std::string& invItemObjPath, const std::string& sensorObjPath)
1483 {
1484     // Look for inventory item in vector
1485     InventoryItem* inventoryItem =
1486         findInventoryItem(inventoryItems, invItemObjPath);
1487 
1488     // If inventory item doesn't exist in vector, add it
1489     if (inventoryItem == nullptr)
1490     {
1491         inventoryItems->emplace_back(invItemObjPath);
1492         inventoryItem = &(inventoryItems->back());
1493     }
1494 
1495     // Add sensor to set of sensors associated with inventory item
1496     inventoryItem->sensors.emplace(sensorObjPath);
1497 }
1498 
1499 /**
1500  * @brief Stores D-Bus data in the specified inventory item.
1501  *
1502  * Finds D-Bus data in the specified map of interfaces.  Stores the data in the
1503  * specified InventoryItem.
1504  *
1505  * This data is later used to provide sensor property values in the JSON
1506  * response.
1507  *
1508  * @param inventoryItem Inventory item where data will be stored.
1509  * @param interfacesDict Map containing D-Bus interfaces and their properties
1510  * for the specified inventory item.
1511  */
1512 inline void storeInventoryItemData(
1513     InventoryItem& inventoryItem,
1514     const boost::container::flat_map<
1515         std::string, boost::container::flat_map<std::string, SensorVariant>>&
1516         interfacesDict)
1517 {
1518     // Get properties from Inventory.Item interface
1519     auto interfaceIt =
1520         interfacesDict.find("xyz.openbmc_project.Inventory.Item");
1521     if (interfaceIt != interfacesDict.end())
1522     {
1523         auto propertyIt = interfaceIt->second.find("Present");
1524         if (propertyIt != interfaceIt->second.end())
1525         {
1526             const bool* value = std::get_if<bool>(&propertyIt->second);
1527             if (value != nullptr)
1528             {
1529                 inventoryItem.isPresent = *value;
1530             }
1531         }
1532     }
1533 
1534     // Check if Inventory.Item.PowerSupply interface is present
1535     interfaceIt =
1536         interfacesDict.find("xyz.openbmc_project.Inventory.Item.PowerSupply");
1537     if (interfaceIt != interfacesDict.end())
1538     {
1539         inventoryItem.isPowerSupply = true;
1540     }
1541 
1542     // Get properties from Inventory.Decorator.Asset interface
1543     interfaceIt =
1544         interfacesDict.find("xyz.openbmc_project.Inventory.Decorator.Asset");
1545     if (interfaceIt != interfacesDict.end())
1546     {
1547         auto propertyIt = interfaceIt->second.find("Manufacturer");
1548         if (propertyIt != interfaceIt->second.end())
1549         {
1550             const std::string* value =
1551                 std::get_if<std::string>(&propertyIt->second);
1552             if (value != nullptr)
1553             {
1554                 inventoryItem.manufacturer = *value;
1555             }
1556         }
1557 
1558         propertyIt = interfaceIt->second.find("Model");
1559         if (propertyIt != interfaceIt->second.end())
1560         {
1561             const std::string* value =
1562                 std::get_if<std::string>(&propertyIt->second);
1563             if (value != nullptr)
1564             {
1565                 inventoryItem.model = *value;
1566             }
1567         }
1568 
1569         propertyIt = interfaceIt->second.find("PartNumber");
1570         if (propertyIt != interfaceIt->second.end())
1571         {
1572             const std::string* value =
1573                 std::get_if<std::string>(&propertyIt->second);
1574             if (value != nullptr)
1575             {
1576                 inventoryItem.partNumber = *value;
1577             }
1578         }
1579 
1580         propertyIt = interfaceIt->second.find("SerialNumber");
1581         if (propertyIt != interfaceIt->second.end())
1582         {
1583             const std::string* value =
1584                 std::get_if<std::string>(&propertyIt->second);
1585             if (value != nullptr)
1586             {
1587                 inventoryItem.serialNumber = *value;
1588             }
1589         }
1590     }
1591 
1592     // Get properties from State.Decorator.OperationalStatus interface
1593     interfaceIt = interfacesDict.find(
1594         "xyz.openbmc_project.State.Decorator.OperationalStatus");
1595     if (interfaceIt != interfacesDict.end())
1596     {
1597         auto propertyIt = interfaceIt->second.find("Functional");
1598         if (propertyIt != interfaceIt->second.end())
1599         {
1600             const bool* value = std::get_if<bool>(&propertyIt->second);
1601             if (value != nullptr)
1602             {
1603                 inventoryItem.isFunctional = *value;
1604             }
1605         }
1606     }
1607 }
1608 
1609 /**
1610  * @brief Gets D-Bus data for inventory items associated with sensors.
1611  *
1612  * Uses the specified connections (services) to obtain D-Bus data for inventory
1613  * items associated with sensors.  Stores the resulting data in the
1614  * inventoryItems vector.
1615  *
1616  * This data is later used to provide sensor property values in the JSON
1617  * response.
1618  *
1619  * Finds the inventory item data asynchronously.  Invokes callback when data has
1620  * been obtained.
1621  *
1622  * The callback must have the following signature:
1623  *   @code
1624  *   callback(void)
1625  *   @endcode
1626  *
1627  * This function is called recursively, obtaining data asynchronously from one
1628  * connection in each call.  This ensures the callback is not invoked until the
1629  * last asynchronous function has completed.
1630  *
1631  * @param sensorsAsyncResp Pointer to object holding response data.
1632  * @param inventoryItems D-Bus inventory items associated with sensors.
1633  * @param invConnections Connections that provide data for the inventory items.
1634  * @param objectMgrPaths Mappings from connection name to DBus object path that
1635  * implements ObjectManager.
1636  * @param callback Callback to invoke when inventory data has been obtained.
1637  * @param invConnectionsIndex Current index in invConnections.  Only specified
1638  * in recursive calls to this function.
1639  */
1640 template <typename Callback>
1641 static void getInventoryItemsData(
1642     std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
1643     std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
1644     std::shared_ptr<boost::container::flat_set<std::string>> invConnections,
1645     std::shared_ptr<boost::container::flat_map<std::string, std::string>>
1646         objectMgrPaths,
1647     Callback&& callback, size_t invConnectionsIndex = 0)
1648 {
1649     BMCWEB_LOG_DEBUG << "getInventoryItemsData enter";
1650 
1651     // If no more connections left, call callback
1652     if (invConnectionsIndex >= invConnections->size())
1653     {
1654         callback();
1655         BMCWEB_LOG_DEBUG << "getInventoryItemsData exit";
1656         return;
1657     }
1658 
1659     // Get inventory item data from current connection
1660     auto it = invConnections->nth(invConnectionsIndex);
1661     if (it != invConnections->end())
1662     {
1663         const std::string& invConnection = *it;
1664 
1665         // Response handler for GetManagedObjects
1666         auto respHandler = [sensorsAsyncResp, inventoryItems, invConnections,
1667                             objectMgrPaths, callback{std::move(callback)},
1668                             invConnectionsIndex](
1669                                const boost::system::error_code ec,
1670                                ManagedObjectsVectorType& resp) {
1671             BMCWEB_LOG_DEBUG << "getInventoryItemsData respHandler enter";
1672             if (ec)
1673             {
1674                 BMCWEB_LOG_ERROR
1675                     << "getInventoryItemsData respHandler DBus error " << ec;
1676                 messages::internalError(sensorsAsyncResp->asyncResp->res);
1677                 return;
1678             }
1679 
1680             // Loop through returned object paths
1681             for (const auto& objDictEntry : resp)
1682             {
1683                 const std::string& objPath =
1684                     static_cast<const std::string&>(objDictEntry.first);
1685 
1686                 // If this object path is one of the specified inventory items
1687                 InventoryItem* inventoryItem =
1688                     findInventoryItem(inventoryItems, objPath);
1689                 if (inventoryItem != nullptr)
1690                 {
1691                     // Store inventory data in InventoryItem
1692                     storeInventoryItemData(*inventoryItem, objDictEntry.second);
1693                 }
1694             }
1695 
1696             // Recurse to get inventory item data from next connection
1697             getInventoryItemsData(sensorsAsyncResp, inventoryItems,
1698                                   invConnections, objectMgrPaths,
1699                                   std::move(callback), invConnectionsIndex + 1);
1700 
1701             BMCWEB_LOG_DEBUG << "getInventoryItemsData respHandler exit";
1702         };
1703 
1704         // Find DBus object path that implements ObjectManager for the current
1705         // connection.  If no mapping found, default to "/".
1706         auto iter = objectMgrPaths->find(invConnection);
1707         const std::string& objectMgrPath =
1708             (iter != objectMgrPaths->end()) ? iter->second : "/";
1709         BMCWEB_LOG_DEBUG << "ObjectManager path for " << invConnection << " is "
1710                          << objectMgrPath;
1711 
1712         // Get all object paths and their interfaces for current connection
1713         crow::connections::systemBus->async_method_call(
1714             std::move(respHandler), invConnection, objectMgrPath,
1715             "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
1716     }
1717 
1718     BMCWEB_LOG_DEBUG << "getInventoryItemsData exit";
1719 }
1720 
1721 /**
1722  * @brief Gets connections that provide D-Bus data for inventory items.
1723  *
1724  * Gets the D-Bus connections (services) that provide data for the inventory
1725  * items that are associated with sensors.
1726  *
1727  * Finds the connections asynchronously.  Invokes callback when information has
1728  * been obtained.
1729  *
1730  * The callback must have the following signature:
1731  *   @code
1732  *   callback(std::shared_ptr<boost::container::flat_set<std::string>>
1733  *            invConnections)
1734  *   @endcode
1735  *
1736  * @param sensorsAsyncResp Pointer to object holding response data.
1737  * @param inventoryItems D-Bus inventory items associated with sensors.
1738  * @param callback Callback to invoke when connections have been obtained.
1739  */
1740 template <typename Callback>
1741 static void getInventoryItemsConnections(
1742     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
1743     const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems,
1744     Callback&& callback)
1745 {
1746     BMCWEB_LOG_DEBUG << "getInventoryItemsConnections enter";
1747 
1748     const std::string path = "/xyz/openbmc_project/inventory";
1749     const std::array<std::string, 4> interfaces = {
1750         "xyz.openbmc_project.Inventory.Item",
1751         "xyz.openbmc_project.Inventory.Item.PowerSupply",
1752         "xyz.openbmc_project.Inventory.Decorator.Asset",
1753         "xyz.openbmc_project.State.Decorator.OperationalStatus"};
1754 
1755     // Response handler for parsing output from GetSubTree
1756     auto respHandler = [callback{std::move(callback)}, sensorsAsyncResp,
1757                         inventoryItems](const boost::system::error_code ec,
1758                                         const GetSubTreeType& subtree) {
1759         BMCWEB_LOG_DEBUG << "getInventoryItemsConnections respHandler enter";
1760         if (ec)
1761         {
1762             messages::internalError(sensorsAsyncResp->asyncResp->res);
1763             BMCWEB_LOG_ERROR
1764                 << "getInventoryItemsConnections respHandler DBus error " << ec;
1765             return;
1766         }
1767 
1768         // Make unique list of connections for desired inventory items
1769         std::shared_ptr<boost::container::flat_set<std::string>>
1770             invConnections =
1771                 std::make_shared<boost::container::flat_set<std::string>>();
1772         invConnections->reserve(8);
1773 
1774         // Loop through objects from GetSubTree
1775         for (const std::pair<
1776                  std::string,
1777                  std::vector<std::pair<std::string, std::vector<std::string>>>>&
1778                  object : subtree)
1779         {
1780             // Check if object path is one of the specified inventory items
1781             const std::string& objPath = object.first;
1782             if (findInventoryItem(inventoryItems, objPath) != nullptr)
1783             {
1784                 // Store all connections to inventory item
1785                 for (const std::pair<std::string, std::vector<std::string>>&
1786                          objData : object.second)
1787                 {
1788                     const std::string& invConnection = objData.first;
1789                     invConnections->insert(invConnection);
1790                 }
1791             }
1792         }
1793 
1794         callback(invConnections);
1795         BMCWEB_LOG_DEBUG << "getInventoryItemsConnections respHandler exit";
1796     };
1797 
1798     // Make call to ObjectMapper to find all inventory items
1799     crow::connections::systemBus->async_method_call(
1800         std::move(respHandler), "xyz.openbmc_project.ObjectMapper",
1801         "/xyz/openbmc_project/object_mapper",
1802         "xyz.openbmc_project.ObjectMapper", "GetSubTree", path, 0, interfaces);
1803     BMCWEB_LOG_DEBUG << "getInventoryItemsConnections exit";
1804 }
1805 
1806 /**
1807  * @brief Gets associations from sensors to inventory items.
1808  *
1809  * Looks for ObjectMapper associations from the specified sensors to related
1810  * inventory items. Then finds the associations from those inventory items to
1811  * their LEDs, if any.
1812  *
1813  * Finds the inventory items asynchronously.  Invokes callback when information
1814  * has been obtained.
1815  *
1816  * The callback must have the following signature:
1817  *   @code
1818  *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
1819  *   @endcode
1820  *
1821  * @param sensorsAsyncResp Pointer to object holding response data.
1822  * @param sensorNames All sensors within the current chassis.
1823  * @param objectMgrPaths Mappings from connection name to DBus object path that
1824  * implements ObjectManager.
1825  * @param callback Callback to invoke when inventory items have been obtained.
1826  */
1827 template <typename Callback>
1828 static void getInventoryItemAssociations(
1829     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
1830     const std::shared_ptr<boost::container::flat_set<std::string>>& sensorNames,
1831     const std::shared_ptr<boost::container::flat_map<std::string, std::string>>&
1832         objectMgrPaths,
1833     Callback&& callback)
1834 {
1835     BMCWEB_LOG_DEBUG << "getInventoryItemAssociations enter";
1836 
1837     // Response handler for GetManagedObjects
1838     auto respHandler = [callback{std::move(callback)}, sensorsAsyncResp,
1839                         sensorNames](const boost::system::error_code ec,
1840                                      dbus::utility::ManagedObjectType& resp) {
1841         BMCWEB_LOG_DEBUG << "getInventoryItemAssociations respHandler enter";
1842         if (ec)
1843         {
1844             BMCWEB_LOG_ERROR
1845                 << "getInventoryItemAssociations respHandler DBus error " << ec;
1846             messages::internalError(sensorsAsyncResp->asyncResp->res);
1847             return;
1848         }
1849 
1850         // Create vector to hold list of inventory items
1851         std::shared_ptr<std::vector<InventoryItem>> inventoryItems =
1852             std::make_shared<std::vector<InventoryItem>>();
1853 
1854         // Loop through returned object paths
1855         std::string sensorAssocPath;
1856         sensorAssocPath.reserve(128); // avoid memory allocations
1857         for (const auto& objDictEntry : resp)
1858         {
1859             const std::string& objPath =
1860                 static_cast<const std::string&>(objDictEntry.first);
1861             const boost::container::flat_map<
1862                 std::string, boost::container::flat_map<
1863                                  std::string, dbus::utility::DbusVariantType>>&
1864                 interfacesDict = objDictEntry.second;
1865 
1866             // If path is inventory association for one of the specified sensors
1867             for (const std::string& sensorName : *sensorNames)
1868             {
1869                 sensorAssocPath = sensorName;
1870                 sensorAssocPath += "/inventory";
1871                 if (objPath == sensorAssocPath)
1872                 {
1873                     // Get Association interface for object path
1874                     auto assocIt =
1875                         interfacesDict.find("xyz.openbmc_project.Association");
1876                     if (assocIt != interfacesDict.end())
1877                     {
1878                         // Get inventory item from end point
1879                         auto endpointsIt = assocIt->second.find("endpoints");
1880                         if (endpointsIt != assocIt->second.end())
1881                         {
1882                             const std::vector<std::string>* endpoints =
1883                                 std::get_if<std::vector<std::string>>(
1884                                     &endpointsIt->second);
1885                             if ((endpoints != nullptr) && !endpoints->empty())
1886                             {
1887                                 // Add inventory item to vector
1888                                 const std::string& invItemPath =
1889                                     endpoints->front();
1890                                 addInventoryItem(inventoryItems, invItemPath,
1891                                                  sensorName);
1892                             }
1893                         }
1894                     }
1895                     break;
1896                 }
1897             }
1898         }
1899 
1900         // Now loop through the returned object paths again, this time to
1901         // find the leds associated with the inventory items we just found
1902         std::string inventoryAssocPath;
1903         inventoryAssocPath.reserve(128); // avoid memory allocations
1904         for (const auto& objDictEntry : resp)
1905         {
1906             const std::string& objPath =
1907                 static_cast<const std::string&>(objDictEntry.first);
1908             const boost::container::flat_map<
1909                 std::string, boost::container::flat_map<
1910                                  std::string, dbus::utility::DbusVariantType>>&
1911                 interfacesDict = objDictEntry.second;
1912 
1913             for (InventoryItem& inventoryItem : *inventoryItems)
1914             {
1915                 inventoryAssocPath = inventoryItem.objectPath;
1916                 inventoryAssocPath += "/leds";
1917                 if (objPath == inventoryAssocPath)
1918                 {
1919                     // Get Association interface for object path
1920                     auto assocIt =
1921                         interfacesDict.find("xyz.openbmc_project.Association");
1922                     if (assocIt != interfacesDict.end())
1923                     {
1924                         // Get inventory item from end point
1925                         auto endpointsIt = assocIt->second.find("endpoints");
1926                         if (endpointsIt != assocIt->second.end())
1927                         {
1928                             const std::vector<std::string>* endpoints =
1929                                 std::get_if<std::vector<std::string>>(
1930                                     &endpointsIt->second);
1931                             if ((endpoints != nullptr) && !endpoints->empty())
1932                             {
1933                                 // Store LED path in inventory item
1934                                 const std::string& ledPath = endpoints->front();
1935                                 inventoryItem.ledObjectPath = ledPath;
1936                             }
1937                         }
1938                     }
1939                     break;
1940                 }
1941             }
1942         }
1943         callback(inventoryItems);
1944         BMCWEB_LOG_DEBUG << "getInventoryItemAssociations respHandler exit";
1945     };
1946 
1947     // Find DBus object path that implements ObjectManager for ObjectMapper
1948     std::string connection = "xyz.openbmc_project.ObjectMapper";
1949     auto iter = objectMgrPaths->find(connection);
1950     const std::string& objectMgrPath =
1951         (iter != objectMgrPaths->end()) ? iter->second : "/";
1952     BMCWEB_LOG_DEBUG << "ObjectManager path for " << connection << " is "
1953                      << objectMgrPath;
1954 
1955     // Call GetManagedObjects on the ObjectMapper to get all associations
1956     crow::connections::systemBus->async_method_call(
1957         std::move(respHandler), connection, objectMgrPath,
1958         "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
1959 
1960     BMCWEB_LOG_DEBUG << "getInventoryItemAssociations exit";
1961 }
1962 
1963 /**
1964  * @brief Gets D-Bus data for inventory item leds associated with sensors.
1965  *
1966  * Uses the specified connections (services) to obtain D-Bus data for inventory
1967  * item leds associated with sensors.  Stores the resulting data in the
1968  * inventoryItems vector.
1969  *
1970  * This data is later used to provide sensor property values in the JSON
1971  * response.
1972  *
1973  * Finds the inventory item led data asynchronously.  Invokes callback when data
1974  * has been obtained.
1975  *
1976  * The callback must have the following signature:
1977  *   @code
1978  *   callback()
1979  *   @endcode
1980  *
1981  * This function is called recursively, obtaining data asynchronously from one
1982  * connection in each call.  This ensures the callback is not invoked until the
1983  * last asynchronous function has completed.
1984  *
1985  * @param sensorsAsyncResp Pointer to object holding response data.
1986  * @param inventoryItems D-Bus inventory items associated with sensors.
1987  * @param ledConnections Connections that provide data for the inventory leds.
1988  * @param callback Callback to invoke when inventory data has been obtained.
1989  * @param ledConnectionsIndex Current index in ledConnections.  Only specified
1990  * in recursive calls to this function.
1991  */
1992 template <typename Callback>
1993 void getInventoryLedData(
1994     std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
1995     std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
1996     std::shared_ptr<boost::container::flat_map<std::string, std::string>>
1997         ledConnections,
1998     Callback&& callback, size_t ledConnectionsIndex = 0)
1999 {
2000     BMCWEB_LOG_DEBUG << "getInventoryLedData enter";
2001 
2002     // If no more connections left, call callback
2003     if (ledConnectionsIndex >= ledConnections->size())
2004     {
2005         callback();
2006         BMCWEB_LOG_DEBUG << "getInventoryLedData exit";
2007         return;
2008     }
2009 
2010     // Get inventory item data from current connection
2011     auto it = ledConnections->nth(ledConnectionsIndex);
2012     if (it != ledConnections->end())
2013     {
2014         const std::string& ledPath = (*it).first;
2015         const std::string& ledConnection = (*it).second;
2016         // Response handler for Get State property
2017         auto respHandler =
2018             [sensorsAsyncResp, inventoryItems, ledConnections, ledPath,
2019              callback{std::move(callback)},
2020              ledConnectionsIndex](const boost::system::error_code ec,
2021                                   const std::variant<std::string>& ledState) {
2022                 BMCWEB_LOG_DEBUG << "getInventoryLedData respHandler enter";
2023                 if (ec)
2024                 {
2025                     BMCWEB_LOG_ERROR
2026                         << "getInventoryLedData respHandler DBus error " << ec;
2027                     messages::internalError(sensorsAsyncResp->asyncResp->res);
2028                     return;
2029                 }
2030 
2031                 const std::string* state = std::get_if<std::string>(&ledState);
2032                 if (state != nullptr)
2033                 {
2034                     BMCWEB_LOG_DEBUG << "Led state: " << *state;
2035                     // Find inventory item with this LED object path
2036                     InventoryItem* inventoryItem =
2037                         findInventoryItemForLed(*inventoryItems, ledPath);
2038                     if (inventoryItem != nullptr)
2039                     {
2040                         // Store LED state in InventoryItem
2041                         if (boost::ends_with(*state, "On"))
2042                         {
2043                             inventoryItem->ledState = LedState::ON;
2044                         }
2045                         else if (boost::ends_with(*state, "Blink"))
2046                         {
2047                             inventoryItem->ledState = LedState::BLINK;
2048                         }
2049                         else if (boost::ends_with(*state, "Off"))
2050                         {
2051                             inventoryItem->ledState = LedState::OFF;
2052                         }
2053                         else
2054                         {
2055                             inventoryItem->ledState = LedState::UNKNOWN;
2056                         }
2057                     }
2058                 }
2059                 else
2060                 {
2061                     BMCWEB_LOG_DEBUG << "Failed to find State data for LED: "
2062                                      << ledPath;
2063                 }
2064 
2065                 // Recurse to get LED data from next connection
2066                 getInventoryLedData(sensorsAsyncResp, inventoryItems,
2067                                     ledConnections, std::move(callback),
2068                                     ledConnectionsIndex + 1);
2069 
2070                 BMCWEB_LOG_DEBUG << "getInventoryLedData respHandler exit";
2071             };
2072 
2073         // Get the State property for the current LED
2074         crow::connections::systemBus->async_method_call(
2075             std::move(respHandler), ledConnection, ledPath,
2076             "org.freedesktop.DBus.Properties", "Get",
2077             "xyz.openbmc_project.Led.Physical", "State");
2078     }
2079 
2080     BMCWEB_LOG_DEBUG << "getInventoryLedData exit";
2081 }
2082 
2083 /**
2084  * @brief Gets LED data for LEDs associated with given inventory items.
2085  *
2086  * Gets the D-Bus connections (services) that provide LED data for the LEDs
2087  * associated with the specified inventory items.  Then gets the LED data from
2088  * each connection and stores it in the inventory item.
2089  *
2090  * This data is later used to provide sensor property values in the JSON
2091  * response.
2092  *
2093  * Finds the LED data asynchronously.  Invokes callback when information has
2094  * been obtained.
2095  *
2096  * The callback must have the following signature:
2097  *   @code
2098  *   callback()
2099  *   @endcode
2100  *
2101  * @param sensorsAsyncResp Pointer to object holding response data.
2102  * @param inventoryItems D-Bus inventory items associated with sensors.
2103  * @param callback Callback to invoke when inventory items have been obtained.
2104  */
2105 template <typename Callback>
2106 void getInventoryLeds(
2107     std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
2108     std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
2109     Callback&& callback)
2110 {
2111     BMCWEB_LOG_DEBUG << "getInventoryLeds enter";
2112 
2113     const std::string path = "/xyz/openbmc_project";
2114     const std::array<std::string, 1> interfaces = {
2115         "xyz.openbmc_project.Led.Physical"};
2116 
2117     // Response handler for parsing output from GetSubTree
2118     auto respHandler = [callback{std::move(callback)}, sensorsAsyncResp,
2119                         inventoryItems](const boost::system::error_code ec,
2120                                         const GetSubTreeType& subtree) {
2121         BMCWEB_LOG_DEBUG << "getInventoryLeds respHandler enter";
2122         if (ec)
2123         {
2124             messages::internalError(sensorsAsyncResp->asyncResp->res);
2125             BMCWEB_LOG_ERROR << "getInventoryLeds respHandler DBus error "
2126                              << ec;
2127             return;
2128         }
2129 
2130         // Build map of LED object paths to connections
2131         std::shared_ptr<boost::container::flat_map<std::string, std::string>>
2132             ledConnections = std::make_shared<
2133                 boost::container::flat_map<std::string, std::string>>();
2134 
2135         // Loop through objects from GetSubTree
2136         for (const std::pair<
2137                  std::string,
2138                  std::vector<std::pair<std::string, std::vector<std::string>>>>&
2139                  object : subtree)
2140         {
2141             // Check if object path is LED for one of the specified inventory
2142             // items
2143             const std::string& ledPath = object.first;
2144             if (findInventoryItemForLed(*inventoryItems, ledPath) != nullptr)
2145             {
2146                 // Add mapping from ledPath to connection
2147                 const std::string& connection = object.second.begin()->first;
2148                 (*ledConnections)[ledPath] = connection;
2149                 BMCWEB_LOG_DEBUG << "Added mapping " << ledPath << " -> "
2150                                  << connection;
2151             }
2152         }
2153 
2154         getInventoryLedData(sensorsAsyncResp, inventoryItems, ledConnections,
2155                             std::move(callback));
2156         BMCWEB_LOG_DEBUG << "getInventoryLeds respHandler exit";
2157     };
2158     // Make call to ObjectMapper to find all inventory items
2159     crow::connections::systemBus->async_method_call(
2160         std::move(respHandler), "xyz.openbmc_project.ObjectMapper",
2161         "/xyz/openbmc_project/object_mapper",
2162         "xyz.openbmc_project.ObjectMapper", "GetSubTree", path, 0, interfaces);
2163     BMCWEB_LOG_DEBUG << "getInventoryLeds exit";
2164 }
2165 
2166 /**
2167  * @brief Gets D-Bus data for Power Supply Attributes such as EfficiencyPercent
2168  *
2169  * Uses the specified connections (services) (currently assumes just one) to
2170  * obtain D-Bus data for Power Supply Attributes. Stores the resulting data in
2171  * the inventoryItems vector. Only stores data in Power Supply inventoryItems.
2172  *
2173  * This data is later used to provide sensor property values in the JSON
2174  * response.
2175  *
2176  * Finds the Power Supply Attributes data asynchronously.  Invokes callback
2177  * when data has been obtained.
2178  *
2179  * The callback must have the following signature:
2180  *   @code
2181  *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
2182  *   @endcode
2183  *
2184  * @param sensorsAsyncResp Pointer to object holding response data.
2185  * @param inventoryItems D-Bus inventory items associated with sensors.
2186  * @param psAttributesConnections Connections that provide data for the Power
2187  *        Supply Attributes
2188  * @param callback Callback to invoke when data has been obtained.
2189  */
2190 template <typename Callback>
2191 void getPowerSupplyAttributesData(
2192     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
2193     std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
2194     const boost::container::flat_map<std::string, std::string>&
2195         psAttributesConnections,
2196     Callback&& callback)
2197 {
2198     BMCWEB_LOG_DEBUG << "getPowerSupplyAttributesData enter";
2199 
2200     if (psAttributesConnections.empty())
2201     {
2202         BMCWEB_LOG_DEBUG << "Can't find PowerSupplyAttributes, no connections!";
2203         callback(inventoryItems);
2204         return;
2205     }
2206 
2207     // Assuming just one connection (service) for now
2208     auto it = psAttributesConnections.nth(0);
2209 
2210     const std::string& psAttributesPath = (*it).first;
2211     const std::string& psAttributesConnection = (*it).second;
2212 
2213     // Response handler for Get DeratingFactor property
2214     auto respHandler = [sensorsAsyncResp, inventoryItems,
2215                         callback{std::move(callback)}](
2216                            const boost::system::error_code ec,
2217                            const std::variant<uint32_t>& deratingFactor) {
2218         BMCWEB_LOG_DEBUG << "getPowerSupplyAttributesData respHandler enter";
2219         if (ec)
2220         {
2221             BMCWEB_LOG_ERROR
2222                 << "getPowerSupplyAttributesData respHandler DBus error " << ec;
2223             messages::internalError(sensorsAsyncResp->asyncResp->res);
2224             return;
2225         }
2226 
2227         const uint32_t* value = std::get_if<uint32_t>(&deratingFactor);
2228         if (value != nullptr)
2229         {
2230             BMCWEB_LOG_DEBUG << "PS EfficiencyPercent value: " << *value;
2231             // Store value in Power Supply Inventory Items
2232             for (InventoryItem& inventoryItem : *inventoryItems)
2233             {
2234                 if (inventoryItem.isPowerSupply == true)
2235                 {
2236                     inventoryItem.powerSupplyEfficiencyPercent =
2237                         static_cast<int>(*value);
2238                 }
2239             }
2240         }
2241         else
2242         {
2243             BMCWEB_LOG_DEBUG
2244                 << "Failed to find EfficiencyPercent value for PowerSupplies";
2245         }
2246 
2247         BMCWEB_LOG_DEBUG << "getPowerSupplyAttributesData respHandler exit";
2248         callback(inventoryItems);
2249     };
2250 
2251     // Get the DeratingFactor property for the PowerSupplyAttributes
2252     // Currently only property on the interface/only one we care about
2253     crow::connections::systemBus->async_method_call(
2254         std::move(respHandler), psAttributesConnection, psAttributesPath,
2255         "org.freedesktop.DBus.Properties", "Get",
2256         "xyz.openbmc_project.Control.PowerSupplyAttributes", "DeratingFactor");
2257 
2258     BMCWEB_LOG_DEBUG << "getPowerSupplyAttributesData exit";
2259 }
2260 
2261 /**
2262  * @brief Gets the Power Supply Attributes such as EfficiencyPercent
2263  *
2264  * Gets the D-Bus connection (service) that provides Power Supply Attributes
2265  * data. Then gets the Power Supply Attributes data from the connection
2266  * (currently just assumes 1 connection) and stores the data in the inventory
2267  * item.
2268  *
2269  * This data is later used to provide sensor property values in the JSON
2270  * response. DeratingFactor on D-Bus is mapped to EfficiencyPercent on Redfish.
2271  *
2272  * Finds the Power Supply Attributes data asynchronously. Invokes callback
2273  * when information has been obtained.
2274  *
2275  * The callback must have the following signature:
2276  *   @code
2277  *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
2278  *   @endcode
2279  *
2280  * @param sensorsAsyncResp Pointer to object holding response data.
2281  * @param inventoryItems D-Bus inventory items associated with sensors.
2282  * @param callback Callback to invoke when data has been obtained.
2283  */
2284 template <typename Callback>
2285 void getPowerSupplyAttributes(
2286     std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
2287     std::shared_ptr<std::vector<InventoryItem>> inventoryItems,
2288     Callback&& callback)
2289 {
2290     BMCWEB_LOG_DEBUG << "getPowerSupplyAttributes enter";
2291 
2292     // Only need the power supply attributes when the Power Schema
2293     if (sensorsAsyncResp->chassisSubNode != sensors::node::power)
2294     {
2295         BMCWEB_LOG_DEBUG << "getPowerSupplyAttributes exit since not Power";
2296         callback(inventoryItems);
2297         return;
2298     }
2299 
2300     const std::array<std::string, 1> interfaces = {
2301         "xyz.openbmc_project.Control.PowerSupplyAttributes"};
2302 
2303     // Response handler for parsing output from GetSubTree
2304     auto respHandler = [callback{std::move(callback)}, sensorsAsyncResp,
2305                         inventoryItems](const boost::system::error_code ec,
2306                                         const GetSubTreeType& subtree) {
2307         BMCWEB_LOG_DEBUG << "getPowerSupplyAttributes respHandler enter";
2308         if (ec)
2309         {
2310             messages::internalError(sensorsAsyncResp->asyncResp->res);
2311             BMCWEB_LOG_ERROR
2312                 << "getPowerSupplyAttributes respHandler DBus error " << ec;
2313             return;
2314         }
2315         if (subtree.size() == 0)
2316         {
2317             BMCWEB_LOG_DEBUG << "Can't find Power Supply Attributes!";
2318             callback(inventoryItems);
2319             return;
2320         }
2321 
2322         // Currently we only support 1 power supply attribute, use this for
2323         // all the power supplies. Build map of object path to connection.
2324         // Assume just 1 connection and 1 path for now.
2325         boost::container::flat_map<std::string, std::string>
2326             psAttributesConnections;
2327 
2328         if (subtree[0].first.empty() || subtree[0].second.empty())
2329         {
2330             BMCWEB_LOG_DEBUG << "Power Supply Attributes mapper error!";
2331             callback(inventoryItems);
2332             return;
2333         }
2334 
2335         const std::string& psAttributesPath = subtree[0].first;
2336         const std::string& connection = subtree[0].second.begin()->first;
2337 
2338         if (connection.empty())
2339         {
2340             BMCWEB_LOG_DEBUG << "Power Supply Attributes mapper error!";
2341             callback(inventoryItems);
2342             return;
2343         }
2344 
2345         psAttributesConnections[psAttributesPath] = connection;
2346         BMCWEB_LOG_DEBUG << "Added mapping " << psAttributesPath << " -> "
2347                          << connection;
2348 
2349         getPowerSupplyAttributesData(sensorsAsyncResp, inventoryItems,
2350                                      psAttributesConnections,
2351                                      std::move(callback));
2352         BMCWEB_LOG_DEBUG << "getPowerSupplyAttributes respHandler exit";
2353     };
2354     // Make call to ObjectMapper to find the PowerSupplyAttributes service
2355     crow::connections::systemBus->async_method_call(
2356         std::move(respHandler), "xyz.openbmc_project.ObjectMapper",
2357         "/xyz/openbmc_project/object_mapper",
2358         "xyz.openbmc_project.ObjectMapper", "GetSubTree",
2359         "/xyz/openbmc_project", 0, interfaces);
2360     BMCWEB_LOG_DEBUG << "getPowerSupplyAttributes exit";
2361 }
2362 
2363 /**
2364  * @brief Gets inventory items associated with sensors.
2365  *
2366  * Finds the inventory items that are associated with the specified sensors.
2367  * Then gets D-Bus data for the inventory items, such as presence and VPD.
2368  *
2369  * This data is later used to provide sensor property values in the JSON
2370  * response.
2371  *
2372  * Finds the inventory items asynchronously.  Invokes callback when the
2373  * inventory items have been obtained.
2374  *
2375  * The callback must have the following signature:
2376  *   @code
2377  *   callback(std::shared_ptr<std::vector<InventoryItem>> inventoryItems)
2378  *   @endcode
2379  *
2380  * @param sensorsAsyncResp Pointer to object holding response data.
2381  * @param sensorNames All sensors within the current chassis.
2382  * @param objectMgrPaths Mappings from connection name to DBus object path that
2383  * implements ObjectManager.
2384  * @param callback Callback to invoke when inventory items have been obtained.
2385  */
2386 template <typename Callback>
2387 static void getInventoryItems(
2388     std::shared_ptr<SensorsAsyncResp> sensorsAsyncResp,
2389     const std::shared_ptr<boost::container::flat_set<std::string>> sensorNames,
2390     std::shared_ptr<boost::container::flat_map<std::string, std::string>>
2391         objectMgrPaths,
2392     Callback&& callback)
2393 {
2394     BMCWEB_LOG_DEBUG << "getInventoryItems enter";
2395     auto getInventoryItemAssociationsCb =
2396         [sensorsAsyncResp, objectMgrPaths, callback{std::move(callback)}](
2397             std::shared_ptr<std::vector<InventoryItem>> inventoryItems) {
2398             BMCWEB_LOG_DEBUG << "getInventoryItemAssociationsCb enter";
2399             auto getInventoryItemsConnectionsCb =
2400                 [sensorsAsyncResp, inventoryItems, objectMgrPaths,
2401                  callback{std::move(callback)}](
2402                     std::shared_ptr<boost::container::flat_set<std::string>>
2403                         invConnections) {
2404                     BMCWEB_LOG_DEBUG << "getInventoryItemsConnectionsCb enter";
2405                     auto getInventoryItemsDataCb =
2406                         [sensorsAsyncResp, inventoryItems,
2407                          callback{std::move(callback)}]() {
2408                             BMCWEB_LOG_DEBUG << "getInventoryItemsDataCb enter";
2409 
2410                             auto getInventoryLedsCb = [sensorsAsyncResp,
2411                                                        inventoryItems,
2412                                                        callback{std::move(
2413                                                            callback)}]() {
2414                                 BMCWEB_LOG_DEBUG << "getInventoryLedsCb enter";
2415                                 // Find Power Supply Attributes and get the data
2416                                 getPowerSupplyAttributes(sensorsAsyncResp,
2417                                                          inventoryItems,
2418                                                          std::move(callback));
2419                                 BMCWEB_LOG_DEBUG << "getInventoryLedsCb exit";
2420                             };
2421 
2422                             // Find led connections and get the data
2423                             getInventoryLeds(sensorsAsyncResp, inventoryItems,
2424                                              std::move(getInventoryLedsCb));
2425                             BMCWEB_LOG_DEBUG << "getInventoryItemsDataCb exit";
2426                         };
2427 
2428                     // Get inventory item data from connections
2429                     getInventoryItemsData(sensorsAsyncResp, inventoryItems,
2430                                           invConnections, objectMgrPaths,
2431                                           std::move(getInventoryItemsDataCb));
2432                     BMCWEB_LOG_DEBUG << "getInventoryItemsConnectionsCb exit";
2433                 };
2434 
2435             // Get connections that provide inventory item data
2436             getInventoryItemsConnections(
2437                 sensorsAsyncResp, inventoryItems,
2438                 std::move(getInventoryItemsConnectionsCb));
2439             BMCWEB_LOG_DEBUG << "getInventoryItemAssociationsCb exit";
2440         };
2441 
2442     // Get associations from sensors to inventory items
2443     getInventoryItemAssociations(sensorsAsyncResp, sensorNames, objectMgrPaths,
2444                                  std::move(getInventoryItemAssociationsCb));
2445     BMCWEB_LOG_DEBUG << "getInventoryItems exit";
2446 }
2447 
2448 /**
2449  * @brief Returns JSON PowerSupply object for the specified inventory item.
2450  *
2451  * Searches for a JSON PowerSupply object that matches the specified inventory
2452  * item.  If one is not found, a new PowerSupply object is added to the JSON
2453  * array.
2454  *
2455  * Multiple sensors are often associated with one power supply inventory item.
2456  * As a result, multiple sensor values are stored in one JSON PowerSupply
2457  * object.
2458  *
2459  * @param powerSupplyArray JSON array containing Redfish PowerSupply objects.
2460  * @param inventoryItem Inventory item for the power supply.
2461  * @param chassisId Chassis that contains the power supply.
2462  * @return JSON PowerSupply object for the specified inventory item.
2463  */
2464 inline nlohmann::json& getPowerSupply(nlohmann::json& powerSupplyArray,
2465                                       const InventoryItem& inventoryItem,
2466                                       const std::string& chassisId)
2467 {
2468     // Check if matching PowerSupply object already exists in JSON array
2469     for (nlohmann::json& powerSupply : powerSupplyArray)
2470     {
2471         if (powerSupply["MemberId"] == inventoryItem.name)
2472         {
2473             return powerSupply;
2474         }
2475     }
2476 
2477     // Add new PowerSupply object to JSON array
2478     powerSupplyArray.push_back({});
2479     nlohmann::json& powerSupply = powerSupplyArray.back();
2480     powerSupply["@odata.id"] =
2481         "/redfish/v1/Chassis/" + chassisId + "/Power#/PowerSupplies/";
2482     powerSupply["MemberId"] = inventoryItem.name;
2483     powerSupply["Name"] = boost::replace_all_copy(inventoryItem.name, "_", " ");
2484     powerSupply["Manufacturer"] = inventoryItem.manufacturer;
2485     powerSupply["Model"] = inventoryItem.model;
2486     powerSupply["PartNumber"] = inventoryItem.partNumber;
2487     powerSupply["SerialNumber"] = inventoryItem.serialNumber;
2488     setLedState(powerSupply, &inventoryItem);
2489 
2490     if (inventoryItem.powerSupplyEfficiencyPercent >= 0)
2491     {
2492         powerSupply["EfficiencyPercent"] =
2493             inventoryItem.powerSupplyEfficiencyPercent;
2494     }
2495 
2496     powerSupply["Status"]["State"] = getState(&inventoryItem);
2497     const char* health = inventoryItem.isFunctional ? "OK" : "Critical";
2498     powerSupply["Status"]["Health"] = health;
2499 
2500     return powerSupply;
2501 }
2502 
2503 /**
2504  * @brief Gets the values of the specified sensors.
2505  *
2506  * Stores the results as JSON in the SensorsAsyncResp.
2507  *
2508  * Gets the sensor values asynchronously.  Stores the results later when the
2509  * information has been obtained.
2510  *
2511  * The sensorNames set contains all requested sensors for the current chassis.
2512  *
2513  * To minimize the number of DBus calls, the DBus method
2514  * org.freedesktop.DBus.ObjectManager.GetManagedObjects() is used to get the
2515  * values of all sensors provided by a connection (service).
2516  *
2517  * The connections set contains all the connections that provide sensor values.
2518  *
2519  * The objectMgrPaths map contains mappings from a connection name to the
2520  * corresponding DBus object path that implements ObjectManager.
2521  *
2522  * The InventoryItem vector contains D-Bus inventory items associated with the
2523  * sensors.  Inventory item data is needed for some Redfish sensor properties.
2524  *
2525  * @param SensorsAsyncResp Pointer to object holding response data.
2526  * @param sensorNames All requested sensors within the current chassis.
2527  * @param connections Connections that provide sensor values.
2528  * @param objectMgrPaths Mappings from connection name to DBus object path that
2529  * implements ObjectManager.
2530  * @param inventoryItems Inventory items associated with the sensors.
2531  */
2532 inline void getSensorData(
2533     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
2534     const std::shared_ptr<boost::container::flat_set<std::string>>& sensorNames,
2535     const boost::container::flat_set<std::string>& connections,
2536     const std::shared_ptr<boost::container::flat_map<std::string, std::string>>&
2537         objectMgrPaths,
2538     const std::shared_ptr<std::vector<InventoryItem>>& inventoryItems)
2539 {
2540     BMCWEB_LOG_DEBUG << "getSensorData enter";
2541     // Get managed objects from all services exposing sensors
2542     for (const std::string& connection : connections)
2543     {
2544         // Response handler to process managed objects
2545         auto getManagedObjectsCb = [sensorsAsyncResp, sensorNames,
2546                                     inventoryItems](
2547                                        const boost::system::error_code ec,
2548                                        ManagedObjectsVectorType& resp) {
2549             BMCWEB_LOG_DEBUG << "getManagedObjectsCb enter";
2550             if (ec)
2551             {
2552                 BMCWEB_LOG_ERROR << "getManagedObjectsCb DBUS error: " << ec;
2553                 messages::internalError(sensorsAsyncResp->asyncResp->res);
2554                 return;
2555             }
2556             // Go through all objects and update response with sensor data
2557             for (const auto& objDictEntry : resp)
2558             {
2559                 const std::string& objPath =
2560                     static_cast<const std::string&>(objDictEntry.first);
2561                 BMCWEB_LOG_DEBUG << "getManagedObjectsCb parsing object "
2562                                  << objPath;
2563 
2564                 std::vector<std::string> split;
2565                 // Reserve space for
2566                 // /xyz/openbmc_project/sensors/<name>/<subname>
2567                 split.reserve(6);
2568                 boost::algorithm::split(split, objPath, boost::is_any_of("/"));
2569                 if (split.size() < 6)
2570                 {
2571                     BMCWEB_LOG_ERROR << "Got path that isn't long enough "
2572                                      << objPath;
2573                     continue;
2574                 }
2575                 // These indexes aren't intuitive, as boost::split puts an empty
2576                 // string at the beginning
2577                 const std::string& sensorType = split[4];
2578                 const std::string& sensorName = split[5];
2579                 BMCWEB_LOG_DEBUG << "sensorName " << sensorName
2580                                  << " sensorType " << sensorType;
2581                 if (sensorNames->find(objPath) == sensorNames->end())
2582                 {
2583                     BMCWEB_LOG_ERROR << sensorName << " not in sensor list ";
2584                     continue;
2585                 }
2586 
2587                 // Find inventory item (if any) associated with sensor
2588                 InventoryItem* inventoryItem =
2589                     findInventoryItemForSensor(inventoryItems, objPath);
2590 
2591                 const std::string& sensorSchema =
2592                     sensorsAsyncResp->chassisSubNode;
2593 
2594                 nlohmann::json* sensorJson = nullptr;
2595 
2596                 if (sensorSchema == sensors::node::sensors)
2597                 {
2598                     sensorsAsyncResp->asyncResp->res.jsonValue["@odata.id"] =
2599                         "/redfish/v1/Chassis/" + sensorsAsyncResp->chassisId +
2600                         "/" + sensorsAsyncResp->chassisSubNode + "/" +
2601                         sensorName;
2602                     sensorJson = &(sensorsAsyncResp->asyncResp->res.jsonValue);
2603                 }
2604                 else
2605                 {
2606                     std::string fieldName;
2607                     if (sensorType == "temperature")
2608                     {
2609                         fieldName = "Temperatures";
2610                     }
2611                     else if (sensorType == "fan" || sensorType == "fan_tach" ||
2612                              sensorType == "fan_pwm")
2613                     {
2614                         fieldName = "Fans";
2615                     }
2616                     else if (sensorType == "voltage")
2617                     {
2618                         fieldName = "Voltages";
2619                     }
2620                     else if (sensorType == "power")
2621                     {
2622                         if (!sensorName.compare("total_power"))
2623                         {
2624                             fieldName = "PowerControl";
2625                         }
2626                         else if ((inventoryItem != nullptr) &&
2627                                  (inventoryItem->isPowerSupply))
2628                         {
2629                             fieldName = "PowerSupplies";
2630                         }
2631                         else
2632                         {
2633                             // Other power sensors are in SensorCollection
2634                             continue;
2635                         }
2636                     }
2637                     else
2638                     {
2639                         BMCWEB_LOG_ERROR << "Unsure how to handle sensorType "
2640                                          << sensorType;
2641                         continue;
2642                     }
2643 
2644                     nlohmann::json& tempArray =
2645                         sensorsAsyncResp->asyncResp->res.jsonValue[fieldName];
2646                     if (fieldName == "PowerControl")
2647                     {
2648                         if (tempArray.empty())
2649                         {
2650                             // Put multiple "sensors" into a single
2651                             // PowerControl. Follows MemberId naming and
2652                             // naming in power.hpp.
2653                             tempArray.push_back(
2654                                 {{"@odata.id",
2655                                   "/redfish/v1/Chassis/" +
2656                                       sensorsAsyncResp->chassisId + "/" +
2657                                       sensorsAsyncResp->chassisSubNode + "#/" +
2658                                       fieldName + "/0"}});
2659                         }
2660                         sensorJson = &(tempArray.back());
2661                     }
2662                     else if (fieldName == "PowerSupplies")
2663                     {
2664                         if (inventoryItem != nullptr)
2665                         {
2666                             sensorJson =
2667                                 &(getPowerSupply(tempArray, *inventoryItem,
2668                                                  sensorsAsyncResp->chassisId));
2669                         }
2670                     }
2671                     else
2672                     {
2673                         tempArray.push_back(
2674                             {{"@odata.id",
2675                               "/redfish/v1/Chassis/" +
2676                                   sensorsAsyncResp->chassisId + "/" +
2677                                   sensorsAsyncResp->chassisSubNode + "#/" +
2678                                   fieldName + "/"}});
2679                         sensorJson = &(tempArray.back());
2680                     }
2681                 }
2682 
2683                 if (sensorJson != nullptr)
2684                 {
2685                     objectInterfacesToJson(
2686                         sensorName, sensorType, sensorsAsyncResp,
2687                         objDictEntry.second, *sensorJson, inventoryItem);
2688                 }
2689             }
2690             if (sensorsAsyncResp.use_count() == 1)
2691             {
2692                 sortJSONResponse(sensorsAsyncResp);
2693                 if (sensorsAsyncResp->chassisSubNode == sensors::node::thermal)
2694                 {
2695                     populateFanRedundancy(sensorsAsyncResp);
2696                 }
2697             }
2698             BMCWEB_LOG_DEBUG << "getManagedObjectsCb exit";
2699         };
2700 
2701         // Find DBus object path that implements ObjectManager for the current
2702         // connection.  If no mapping found, default to "/".
2703         auto iter = objectMgrPaths->find(connection);
2704         const std::string& objectMgrPath =
2705             (iter != objectMgrPaths->end()) ? iter->second : "/";
2706         BMCWEB_LOG_DEBUG << "ObjectManager path for " << connection << " is "
2707                          << objectMgrPath;
2708 
2709         crow::connections::systemBus->async_method_call(
2710             getManagedObjectsCb, connection, objectMgrPath,
2711             "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
2712     }
2713     BMCWEB_LOG_DEBUG << "getSensorData exit";
2714 }
2715 
2716 inline void processSensorList(
2717     const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp,
2718     const std::shared_ptr<boost::container::flat_set<std::string>>& sensorNames)
2719 {
2720     auto getConnectionCb =
2721         [sensorsAsyncResp, sensorNames](
2722             const boost::container::flat_set<std::string>& connections) {
2723             BMCWEB_LOG_DEBUG << "getConnectionCb enter";
2724             auto getObjectManagerPathsCb =
2725                 [sensorsAsyncResp, sensorNames,
2726                  connections](const std::shared_ptr<boost::container::flat_map<
2727                                   std::string, std::string>>& objectMgrPaths) {
2728                     BMCWEB_LOG_DEBUG << "getObjectManagerPathsCb enter";
2729                     auto getInventoryItemsCb =
2730                         [sensorsAsyncResp, sensorNames, connections,
2731                          objectMgrPaths](
2732                             const std::shared_ptr<std::vector<InventoryItem>>&
2733                                 inventoryItems) {
2734                             BMCWEB_LOG_DEBUG << "getInventoryItemsCb enter";
2735                             // Get sensor data and store results in JSON
2736                             getSensorData(sensorsAsyncResp, sensorNames,
2737                                           connections, objectMgrPaths,
2738                                           inventoryItems);
2739                             BMCWEB_LOG_DEBUG << "getInventoryItemsCb exit";
2740                         };
2741 
2742                     // Get inventory items associated with sensors
2743                     getInventoryItems(sensorsAsyncResp, sensorNames,
2744                                       objectMgrPaths,
2745                                       std::move(getInventoryItemsCb));
2746 
2747                     BMCWEB_LOG_DEBUG << "getObjectManagerPathsCb exit";
2748                 };
2749 
2750             // Get mapping from connection names to the DBus object
2751             // paths that implement the ObjectManager interface
2752             getObjectManagerPaths(sensorsAsyncResp,
2753                                   std::move(getObjectManagerPathsCb));
2754             BMCWEB_LOG_DEBUG << "getConnectionCb exit";
2755         };
2756 
2757     // Get set of connections that provide sensor values
2758     getConnections(sensorsAsyncResp, sensorNames, std::move(getConnectionCb));
2759 }
2760 
2761 /**
2762  * @brief Entry point for retrieving sensors data related to requested
2763  *        chassis.
2764  * @param SensorsAsyncResp   Pointer to object holding response data
2765  */
2766 inline void
2767     getChassisData(const std::shared_ptr<SensorsAsyncResp>& sensorsAsyncResp)
2768 {
2769     BMCWEB_LOG_DEBUG << "getChassisData enter";
2770     auto getChassisCb =
2771         [sensorsAsyncResp](
2772             const std::shared_ptr<boost::container::flat_set<std::string>>&
2773                 sensorNames) {
2774             BMCWEB_LOG_DEBUG << "getChassisCb enter";
2775             processSensorList(sensorsAsyncResp, sensorNames);
2776             BMCWEB_LOG_DEBUG << "getChassisCb exit";
2777         };
2778     sensorsAsyncResp->asyncResp->res.jsonValue["Redundancy"] =
2779         nlohmann::json::array();
2780 
2781     // Get set of sensors in chassis
2782     getChassis(sensorsAsyncResp, std::move(getChassisCb));
2783     BMCWEB_LOG_DEBUG << "getChassisData exit";
2784 }
2785 
2786 /**
2787  * @brief Find the requested sensorName in the list of all sensors supplied by
2788  * the chassis node
2789  *
2790  * @param sensorName   The sensor name supplied in the PATCH request
2791  * @param sensorsList  The list of sensors managed by the chassis node
2792  * @param sensorsModified  The list of sensors that were found as a result of
2793  *                         repeated calls to this function
2794  */
2795 inline bool findSensorNameUsingSensorPath(
2796     std::string_view sensorName,
2797     boost::container::flat_set<std::string>& sensorsList,
2798     boost::container::flat_set<std::string>& sensorsModified)
2799 {
2800     for (auto& chassisSensor : sensorsList)
2801     {
2802         sdbusplus::message::object_path path(chassisSensor);
2803         std::string thisSensorName = path.filename();
2804         if (thisSensorName.empty())
2805         {
2806             continue;
2807         }
2808         if (thisSensorName == sensorName)
2809         {
2810             sensorsModified.emplace(chassisSensor);
2811             return true;
2812         }
2813     }
2814     return false;
2815 }
2816 
2817 /**
2818  * @brief Entry point for overriding sensor values of given sensor
2819  *
2820  * @param sensorAsyncResp   response object
2821  * @param allCollections   Collections extract from sensors' request patch info
2822  * @param chassisSubNode   Chassis Node for which the query has to happen
2823  */
2824 inline void setSensorsOverride(
2825     const std::shared_ptr<SensorsAsyncResp>& sensorAsyncResp,
2826     std::unordered_map<std::string, std::vector<nlohmann::json>>&
2827         allCollections)
2828 {
2829     BMCWEB_LOG_INFO << "setSensorsOverride for subNode"
2830                     << sensorAsyncResp->chassisSubNode << "\n";
2831 
2832     const char* propertyValueName;
2833     std::unordered_map<std::string, std::pair<double, std::string>> overrideMap;
2834     std::string memberId;
2835     double value;
2836     for (auto& collectionItems : allCollections)
2837     {
2838         if (collectionItems.first == "Temperatures")
2839         {
2840             propertyValueName = "ReadingCelsius";
2841         }
2842         else if (collectionItems.first == "Fans")
2843         {
2844             propertyValueName = "Reading";
2845         }
2846         else
2847         {
2848             propertyValueName = "ReadingVolts";
2849         }
2850         for (auto& item : collectionItems.second)
2851         {
2852             if (!json_util::readJson(item, sensorAsyncResp->asyncResp->res,
2853                                      "MemberId", memberId, propertyValueName,
2854                                      value))
2855             {
2856                 return;
2857             }
2858             overrideMap.emplace(memberId,
2859                                 std::make_pair(value, collectionItems.first));
2860         }
2861     }
2862 
2863     auto getChassisSensorListCb = [sensorAsyncResp, overrideMap](
2864                                       const std::shared_ptr<
2865                                           boost::container::flat_set<
2866                                               std::string>>& sensorsList) {
2867         // Match sensor names in the PATCH request to those managed by the
2868         // chassis node
2869         const std::shared_ptr<boost::container::flat_set<std::string>>
2870             sensorNames =
2871                 std::make_shared<boost::container::flat_set<std::string>>();
2872         for (const auto& item : overrideMap)
2873         {
2874             const auto& sensor = item.first;
2875             if (!findSensorNameUsingSensorPath(sensor, *sensorsList,
2876                                                *sensorNames))
2877             {
2878                 BMCWEB_LOG_INFO << "Unable to find memberId " << item.first;
2879                 messages::resourceNotFound(sensorAsyncResp->asyncResp->res,
2880                                            item.second.second, item.first);
2881                 return;
2882             }
2883         }
2884         // Get the connection to which the memberId belongs
2885         auto getObjectsWithConnectionCb =
2886             [sensorAsyncResp, overrideMap](
2887                 const boost::container::flat_set<std::string>& /*connections*/,
2888                 const std::set<std::pair<std::string, std::string>>&
2889                     objectsWithConnection) {
2890                 if (objectsWithConnection.size() != overrideMap.size())
2891                 {
2892                     BMCWEB_LOG_INFO
2893                         << "Unable to find all objects with proper connection "
2894                         << objectsWithConnection.size() << " requested "
2895                         << overrideMap.size() << "\n";
2896                     messages::resourceNotFound(
2897                         sensorAsyncResp->asyncResp->res,
2898                         sensorAsyncResp->chassisSubNode ==
2899                                 sensors::node::thermal
2900                             ? "Temperatures"
2901                             : "Voltages",
2902                         "Count");
2903                     return;
2904                 }
2905                 for (const auto& item : objectsWithConnection)
2906                 {
2907                     sdbusplus::message::object_path path(item.first);
2908                     std::string sensorName = path.filename();
2909                     if (sensorName.empty())
2910                     {
2911                         messages::internalError(
2912                             sensorAsyncResp->asyncResp->res);
2913                         return;
2914                     }
2915 
2916                     const auto& iterator = overrideMap.find(sensorName);
2917                     if (iterator == overrideMap.end())
2918                     {
2919                         BMCWEB_LOG_INFO << "Unable to find sensor object"
2920                                         << item.first << "\n";
2921                         messages::internalError(
2922                             sensorAsyncResp->asyncResp->res);
2923                         return;
2924                     }
2925                     crow::connections::systemBus->async_method_call(
2926                         [sensorAsyncResp](const boost::system::error_code ec) {
2927                             if (ec)
2928                             {
2929                                 BMCWEB_LOG_DEBUG
2930                                     << "setOverrideValueStatus DBUS error: "
2931                                     << ec;
2932                                 messages::internalError(
2933                                     sensorAsyncResp->asyncResp->res);
2934                                 return;
2935                             }
2936                         },
2937                         item.second, item.first,
2938                         "org.freedesktop.DBus.Properties", "Set",
2939                         "xyz.openbmc_project.Sensor.Value", "Value",
2940                         std::variant<double>(iterator->second.first));
2941                 }
2942             };
2943         // Get object with connection for the given sensor name
2944         getObjectsWithConnection(sensorAsyncResp, sensorNames,
2945                                  std::move(getObjectsWithConnectionCb));
2946     };
2947     // get full sensor list for the given chassisId and cross verify the sensor.
2948     getChassis(sensorAsyncResp, std::move(getChassisSensorListCb));
2949 }
2950 
2951 /**
2952  * @brief Retrieves mapping of Redfish URIs to sensor value property to D-Bus
2953  * path of the sensor.
2954  *
2955  * Function builds valid Redfish response for sensor query of given chassis and
2956  * node. It then builds metadata about Redfish<->D-Bus correlations and provides
2957  * it to caller in a callback.
2958  *
2959  * @param chassis   Chassis for which retrieval should be performed
2960  * @param node  Node (group) of sensors. See sensors::node for supported values
2961  * @param mapComplete   Callback to be called with retrieval result
2962  */
2963 inline void retrieveUriToDbusMap(const std::string& chassis,
2964                                  const std::string& node,
2965                                  SensorsAsyncResp::DataCompleteCb&& mapComplete)
2966 {
2967     auto pathIt = sensors::dbus::paths.find(node);
2968     if (pathIt == sensors::dbus::paths.end())
2969     {
2970         BMCWEB_LOG_ERROR << "Wrong node provided : " << node;
2971         mapComplete(boost::beast::http::status::bad_request, {});
2972         return;
2973     }
2974 
2975     auto res = std::make_shared<crow::Response>();
2976     auto asyncResp = std::make_shared<bmcweb::AsyncResp>(*res);
2977     auto callback =
2978         [res, asyncResp, mapCompleteCb{std::move(mapComplete)}](
2979             const boost::beast::http::status status,
2980             const boost::container::flat_map<std::string, std::string>&
2981                 uriToDbus) { mapCompleteCb(status, uriToDbus); };
2982 
2983     auto resp = std::make_shared<SensorsAsyncResp>(
2984         asyncResp, chassis, pathIt->second, node, std::move(callback));
2985     getChassisData(resp);
2986 }
2987 
2988 inline void requestRoutesSensorCollection(App& app)
2989 {
2990     BMCWEB_ROUTE(app, "/redfish/v1/Chassis/<str>/Sensors/")
2991         .privileges(redfish::privileges::getSensorCollection)
2992         .methods(
2993             boost::beast::http::verb::get)([](const crow::Request&,
2994                                               const std::shared_ptr<
2995                                                   bmcweb::AsyncResp>& aResp,
2996                                               const std::string& chassisId) {
2997             BMCWEB_LOG_DEBUG << "SensorCollection doGet enter";
2998 
2999             std::shared_ptr<SensorsAsyncResp> asyncResp =
3000                 std::make_shared<SensorsAsyncResp>(
3001                     aResp, chassisId,
3002                     sensors::dbus::paths.at(sensors::node::sensors),
3003                     sensors::node::sensors);
3004 
3005             auto getChassisCb =
3006                 [asyncResp](
3007                     const std::shared_ptr<
3008                         boost::container::flat_set<std::string>>& sensorNames) {
3009                     BMCWEB_LOG_DEBUG << "getChassisCb enter";
3010 
3011                     nlohmann::json& entriesArray =
3012                         asyncResp->asyncResp->res.jsonValue["Members"];
3013                     for (auto& sensor : *sensorNames)
3014                     {
3015                         BMCWEB_LOG_DEBUG << "Adding sensor: " << sensor;
3016 
3017                         sdbusplus::message::object_path path(sensor);
3018                         std::string sensorName = path.filename();
3019                         if (sensorName.empty())
3020                         {
3021                             BMCWEB_LOG_ERROR << "Invalid sensor path: "
3022                                              << sensor;
3023                             messages::internalError(asyncResp->asyncResp->res);
3024                             return;
3025                         }
3026                         entriesArray.push_back(
3027                             {{"@odata.id", "/redfish/v1/Chassis/" +
3028                                                asyncResp->chassisId + "/" +
3029                                                asyncResp->chassisSubNode + "/" +
3030                                                sensorName}});
3031                     }
3032 
3033                     asyncResp->asyncResp->res.jsonValue["Members@odata.count"] =
3034                         entriesArray.size();
3035                     BMCWEB_LOG_DEBUG << "getChassisCb exit";
3036                 };
3037 
3038             // Get set of sensors in chassis
3039             getChassis(asyncResp, std::move(getChassisCb));
3040             BMCWEB_LOG_DEBUG << "SensorCollection doGet exit";
3041         });
3042 }
3043 
3044 inline void requestRoutesSensor(App& app)
3045 {
3046     BMCWEB_ROUTE(app, "/redfish/v1/Chassis/<str>/Sensors/<str>/")
3047         .privileges(redfish::privileges::getSensor)
3048         .methods(
3049             boost::beast::http::verb::get)([](const crow::Request&,
3050                                               const std::shared_ptr<
3051                                                   bmcweb::AsyncResp>& aResp,
3052                                               const std::string& chassisId,
3053                                               const std::string& sensorName) {
3054             BMCWEB_LOG_DEBUG << "Sensor doGet enter";
3055             std::shared_ptr<SensorsAsyncResp> asyncResp =
3056                 std::make_shared<SensorsAsyncResp>(aResp, chassisId,
3057                                                    std::vector<const char*>(),
3058                                                    sensors::node::sensors);
3059 
3060             const std::array<const char*, 1> interfaces = {
3061                 "xyz.openbmc_project.Sensor.Value"};
3062 
3063             // Get a list of all of the sensors that implement Sensor.Value
3064             // and get the path and service name associated with the sensor
3065             crow::connections::systemBus->async_method_call(
3066                 [asyncResp, sensorName](const boost::system::error_code ec,
3067                                         const GetSubTreeType& subtree) {
3068                     BMCWEB_LOG_DEBUG << "respHandler1 enter";
3069                     if (ec)
3070                     {
3071                         messages::internalError(asyncResp->asyncResp->res);
3072                         BMCWEB_LOG_ERROR
3073                             << "Sensor getSensorPaths resp_handler: "
3074                             << "Dbus error " << ec;
3075                         return;
3076                     }
3077 
3078                     GetSubTreeType::const_iterator it = std::find_if(
3079                         subtree.begin(), subtree.end(),
3080                         [sensorName](
3081                             const std::pair<
3082                                 std::string,
3083                                 std::vector<std::pair<
3084                                     std::string, std::vector<std::string>>>>&
3085                                 object) {
3086                             sdbusplus::message::object_path path(object.first);
3087                             std::string name = path.filename();
3088                             if (name.empty())
3089                             {
3090                                 BMCWEB_LOG_ERROR << "Invalid sensor path: "
3091                                                  << object.first;
3092                                 return false;
3093                             }
3094 
3095                             return name == sensorName;
3096                         });
3097 
3098                     if (it == subtree.end())
3099                     {
3100                         BMCWEB_LOG_ERROR << "Could not find path for sensor: "
3101                                          << sensorName;
3102                         messages::resourceNotFound(asyncResp->asyncResp->res,
3103                                                    "Sensor", sensorName);
3104                         return;
3105                     }
3106                     std::string_view sensorPath = (*it).first;
3107                     BMCWEB_LOG_DEBUG << "Found sensor path for sensor '"
3108                                      << sensorName << "': " << sensorPath;
3109 
3110                     const std::shared_ptr<
3111                         boost::container::flat_set<std::string>>
3112                         sensorList = std::make_shared<
3113                             boost::container::flat_set<std::string>>();
3114 
3115                     sensorList->emplace(sensorPath);
3116                     processSensorList(asyncResp, sensorList);
3117                     BMCWEB_LOG_DEBUG << "respHandler1 exit";
3118                 },
3119                 "xyz.openbmc_project.ObjectMapper",
3120                 "/xyz/openbmc_project/object_mapper",
3121                 "xyz.openbmc_project.ObjectMapper", "GetSubTree",
3122                 "/xyz/openbmc_project/sensors", 2, interfaces);
3123         });
3124 }
3125 
3126 } // namespace redfish
3127