1 /*
2 // Copyright (c) 2019 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 
17 #pragma once
18 
19 #include <sdbusplus/bus.hpp>
20 #include <sdbusplus/bus/match.hpp>
21 
22 #include <set>
23 
24 namespace pid_control
25 {
26 /*
27  * DbusPassiveRedundancy monitors the fan redundancy interface via dbus match
28  * for changes. When the "Status" property changes to  Failed, all sensors in
29  * the interface's "Collection" property are added to the failed member. This
30  * set can then be queried by a sensor to see if they are part of a failed
31  * redundancy collection. When this happens, they get marked as failed.
32  */
33 
34 class DbusPassiveRedundancy
35 {
36   public:
37     explicit DbusPassiveRedundancy(sdbusplus::bus::bus& bus);
38     const std::set<std::string>& getFailed(void);
39 
40   private:
41     void populateFailures(void);
42 
43     sdbusplus::bus::match::match match;
44     std::set<std::string> failed;
45     sdbusplus::bus::bus& passiveBus;
46 };
47 
48 } // namespace pid_control
49