1 /**
2  * Copyright 2017 Google Inc.
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 #include <iostream>
18 #include <map>
19 #include <memory>
20 #include <string>
21 
22 /* Configuration. */
23 #include "conf.hpp"
24 #include "dbus/dbushelper.hpp"
25 #include "dbus/dbuspassive.hpp"
26 #include "dbus/dbuswrite.hpp"
27 #include "errors/exception.hpp"
28 #include "interfaces.hpp"
29 #include "notimpl/readonly.hpp"
30 #include "notimpl/writeonly.hpp"
31 #include "sensors/build_utils.hpp"
32 #include "sensors/builder.hpp"
33 #include "sensors/host.hpp"
34 #include "sensors/manager.hpp"
35 #include "sensors/pluggable.hpp"
36 #include "sysfs/sysfsread.hpp"
37 #include "sysfs/sysfswrite.hpp"
38 #include "util.hpp"
39 
40 namespace pid_control
41 {
42 
43 static constexpr bool deferSignals = true;
44 
45 SensorManager
46     buildSensors(const std::map<std::string, conf::SensorConfig>& config,
47                  sdbusplus::bus_t& passive, sdbusplus::bus_t& host)
48 {
49     SensorManager mgmr(passive, host);
50     auto& hostSensorBus = mgmr.getHostBus();
51     auto& passiveListeningBus = mgmr.getPassiveBus();
52 
53     for (const auto& it : config)
54     {
55         std::unique_ptr<ReadInterface> ri;
56         std::unique_ptr<WriteInterface> wi;
57 
58         std::string name = it.first;
59         const conf::SensorConfig* info = &it.second;
60 
61         std::cerr << "Sensor: " << name << " " << info->type << " ";
62         std::cerr << info->readPath << " " << info->writePath << "\n";
63 
64         IOInterfaceType rtype = getReadInterfaceType(info->readPath);
65         IOInterfaceType wtype = getWriteInterfaceType(info->writePath);
66 
67         // fan sensors can be ready any way and written others.
68         // fan sensors are the only sensors this is designed to write.
69         // Nothing here should be write-only, although, in theory a fan could
70         // be. I'm just not sure how that would fit together.
71         // TODO(venture): It should check with the ObjectMapper to check if
72         // that sensor exists on the Dbus.
73         switch (rtype)
74         {
75             case IOInterfaceType::DBUSPASSIVE:
76                 // we only need to make one match based on the dbus object
77                 static std::shared_ptr<DbusPassiveRedundancy> redundancy =
78                     std::make_shared<DbusPassiveRedundancy>(
79                         passiveListeningBus);
80 
81                 if (info->type == "fan")
82                 {
83                     ri = DbusPassive::createDbusPassive(
84                         passiveListeningBus, info->type, name,
85                         std::make_unique<DbusHelper>(
86                             sdbusplus::bus::new_system()),
87                         info, redundancy);
88                 }
89                 else
90                 {
91                     ri = DbusPassive::createDbusPassive(
92                         passiveListeningBus, info->type, name,
93                         std::make_unique<DbusHelper>(
94                             sdbusplus::bus::new_system()),
95                         info, nullptr);
96                 }
97                 if (ri == nullptr)
98                 {
99                     throw SensorBuildException(
100                         "Failed to create dbus passive sensor: " + name +
101                         " of type: " + info->type);
102                 }
103                 break;
104             case IOInterfaceType::EXTERNAL:
105                 // These are a special case for read-only.
106                 break;
107             case IOInterfaceType::SYSFS:
108                 ri = std::make_unique<SysFsRead>(info->readPath);
109                 break;
110             default:
111                 ri = std::make_unique<WriteOnly>();
112                 break;
113         }
114 
115         if (info->type == "fan")
116         {
117             switch (wtype)
118             {
119                 case IOInterfaceType::SYSFS:
120                     if (info->max > 0)
121                     {
122                         wi = std::make_unique<SysFsWritePercent>(
123                             info->writePath, info->min, info->max);
124                     }
125                     else
126                     {
127                         wi = std::make_unique<SysFsWrite>(info->writePath,
128                                                           info->min, info->max);
129                     }
130 
131                     break;
132                 case IOInterfaceType::DBUSACTIVE:
133                     if (info->max > 0)
134                     {
135                         wi = DbusWritePercent::createDbusWrite(
136                             info->writePath, info->min, info->max,
137                             std::make_unique<DbusHelper>(
138                                 sdbusplus::bus::new_system()));
139                     }
140                     else
141                     {
142                         wi = DbusWrite::createDbusWrite(
143                             info->writePath, info->min, info->max,
144                             std::make_unique<DbusHelper>(
145                                 sdbusplus::bus::new_system()));
146                     }
147 
148                     if (wi == nullptr)
149                     {
150                         throw SensorBuildException(
151                             "Unable to create write dbus interface for path: " +
152                             info->writePath);
153                     }
154 
155                     break;
156                 default:
157                     wi = std::make_unique<ReadOnlyNoExcept>();
158                     break;
159             }
160 
161             auto sensor = std::make_unique<PluggableSensor>(
162                 name, info->timeout, std::move(ri), std::move(wi));
163             mgmr.addSensor(info->type, name, std::move(sensor));
164         }
165         else if (info->type == "temp" || info->type == "margin")
166         {
167             // These sensors are read-only, but only for this application
168             // which only writes to fan sensors.
169             std::cerr << info->type << " readPath: " << info->readPath << "\n";
170 
171             if (IOInterfaceType::EXTERNAL == rtype)
172             {
173                 std::cerr << "Creating HostSensor: " << name
174                           << " path: " << info->readPath << "\n";
175 
176                 /*
177                  * The reason we handle this as a HostSensor is because it's
178                  * not quite pluggable; but maybe it could be.
179                  */
180                 auto sensor = HostSensor::createTemp(
181                     name, info->timeout, hostSensorBus, info->readPath.c_str(),
182                     deferSignals);
183                 mgmr.addSensor(info->type, name, std::move(sensor));
184             }
185             else
186             {
187                 wi = std::make_unique<ReadOnlyNoExcept>();
188                 auto sensor = std::make_unique<PluggableSensor>(
189                     name, info->timeout, std::move(ri), std::move(wi));
190                 mgmr.addSensor(info->type, name, std::move(sensor));
191             }
192         }
193     }
194 
195     return mgmr;
196 }
197 
198 } // namespace pid_control
199