1 #include "watchdog_service.hpp"
2 
3 #include <host-ipmid/ipmid-api.h>
4 
5 #include <exception>
6 #include <phosphor-logging/elog-errors.hpp>
7 #include <phosphor-logging/elog.hpp>
8 #include <phosphor-logging/log.hpp>
9 #include <sdbusplus/bus.hpp>
10 #include <sdbusplus/message.hpp>
11 #include <stdexcept>
12 #include <string>
13 #include <xyz/openbmc_project/Common/error.hpp>
14 #include <xyz/openbmc_project/State/Watchdog/server.hpp>
15 
16 using phosphor::logging::elog;
17 using phosphor::logging::entry;
18 using phosphor::logging::level;
19 using phosphor::logging::log;
20 using sdbusplus::message::variant_ns::get;
21 using sdbusplus::message::variant_ns::variant;
22 using sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
23 using sdbusplus::xyz::openbmc_project::State::server::convertForMessage;
24 using sdbusplus::xyz::openbmc_project::State::server::Watchdog;
25 
26 static constexpr char wd_path[] = "/xyz/openbmc_project/watchdog/host0";
27 static constexpr char wd_intf[] = "xyz.openbmc_project.State.Watchdog";
28 static constexpr char prop_intf[] = "org.freedesktop.DBus.Properties";
29 
30 ipmi::ServiceCache WatchdogService::wd_service(wd_intf, wd_path);
31 
32 WatchdogService::WatchdogService() : bus(ipmid_get_sd_bus_connection())
33 {
34 }
35 
36 void WatchdogService::resetTimeRemaining(bool enableWatchdog)
37 {
38     bool wasValid = wd_service.isValid(bus);
39     auto request = wd_service.newMethodCall(bus, wd_intf, "ResetTimeRemaining");
40     request.append(enableWatchdog);
41     auto response = bus.call(request);
42     if (response.is_method_error())
43     {
44         wd_service.invalidate();
45         if (wasValid)
46         {
47             // Retry the request once in case the cached service was stale
48             return resetTimeRemaining(enableWatchdog);
49         }
50         log<level::ERR>(
51             "WatchdogService: Method error resetting time remaining",
52             entry("ENABLE_WATCHDOG=%d", !!enableWatchdog));
53         elog<InternalFailure>();
54     }
55 }
56 
57 WatchdogService::Properties WatchdogService::getProperties()
58 {
59     bool wasValid = wd_service.isValid(bus);
60     auto request = wd_service.newMethodCall(bus, prop_intf, "GetAll");
61     request.append(wd_intf);
62     auto response = bus.call(request);
63     if (response.is_method_error())
64     {
65         wd_service.invalidate();
66         if (wasValid)
67         {
68             // Retry the request once in case the cached service was stale
69             return getProperties();
70         }
71         log<level::ERR>("WatchdogService: Method error getting properties");
72         elog<InternalFailure>();
73     }
74     try
75     {
76         std::map<std::string, variant<bool, uint64_t, std::string>> properties;
77         response.read(properties);
78         Properties wd_prop;
79         wd_prop.initialized = get<bool>(properties.at("Initialized"));
80         wd_prop.enabled = get<bool>(properties.at("Enabled"));
81         wd_prop.expireAction = Watchdog::convertActionFromString(
82             get<std::string>(properties.at("ExpireAction")));
83         wd_prop.interval = get<uint64_t>(properties.at("Interval"));
84         wd_prop.timeRemaining = get<uint64_t>(properties.at("TimeRemaining"));
85         return wd_prop;
86     }
87     catch (const std::exception& e)
88     {
89         log<level::ERR>("WatchdogService: Decode error in get properties",
90                         entry("ERROR=%s", e.what()),
91                         entry("REPLY_SIG=%s", response.get_signature()));
92         elog<InternalFailure>();
93     }
94 
95     // Needed instead of elog<InternalFailure>() since the compiler can't
96     // deduce the that elog<>() always throws
97     throw std::runtime_error(
98         "WatchdogService: Should not reach end of getProperties");
99 }
100 
101 template <typename T>
102 T WatchdogService::getProperty(const std::string& key)
103 {
104     bool wasValid = wd_service.isValid(bus);
105     auto request = wd_service.newMethodCall(bus, prop_intf, "Get");
106     request.append(wd_intf, key);
107     auto response = bus.call(request);
108     if (response.is_method_error())
109     {
110         wd_service.invalidate();
111         if (wasValid)
112         {
113             // Retry the request once in case the cached service was stale
114             return getProperty<T>(key);
115         }
116         log<level::ERR>("WatchdogService: Method error getting property",
117                         entry("PROPERTY=%s", key.c_str()));
118         elog<InternalFailure>();
119     }
120     try
121     {
122         variant<T> value;
123         response.read(value);
124         return get<T>(value);
125     }
126     catch (const std::exception& e)
127     {
128         log<level::ERR>("WatchdogService: Decode error in get property",
129                         entry("PROPERTY=%s", key.c_str()),
130                         entry("ERROR=%s", e.what()),
131                         entry("REPLY_SIG=%s", response.get_signature()));
132         elog<InternalFailure>();
133     }
134 
135     // Needed instead of elog<InternalFailure>() since the compiler can't
136     // deduce the that elog<>() always throws
137     throw std::runtime_error(
138         "WatchdogService: Should not reach end of getProperty");
139 }
140 
141 template <typename T>
142 void WatchdogService::setProperty(const std::string& key, const T& val)
143 {
144     bool wasValid = wd_service.isValid(bus);
145     auto request = wd_service.newMethodCall(bus, prop_intf, "Set");
146     request.append(wd_intf, key, variant<T>(val));
147     auto response = bus.call(request);
148     if (response.is_method_error())
149     {
150         wd_service.invalidate();
151         if (wasValid)
152         {
153             // Retry the request once in case the cached service was stale
154             return setProperty(key, val);
155         }
156         log<level::ERR>("WatchdogService: Method error setting property",
157                         entry("PROPERTY=%s", key.c_str()));
158         elog<InternalFailure>();
159     }
160 }
161 
162 bool WatchdogService::getInitialized()
163 {
164     return getProperty<bool>("Initialized");
165 }
166 
167 void WatchdogService::setInitialized(bool initialized)
168 {
169     setProperty("Initialized", initialized);
170 }
171 
172 void WatchdogService::setEnabled(bool enabled)
173 {
174     setProperty("Enabled", enabled);
175 }
176 
177 void WatchdogService::setExpireAction(Action expireAction)
178 {
179     setProperty("ExpireAction", convertForMessage(expireAction));
180 }
181 
182 void WatchdogService::setInterval(uint64_t interval)
183 {
184     setProperty("Interval", interval);
185 }
186 
187 void WatchdogService::setTimeRemaining(uint64_t timeRemaining)
188 {
189     setProperty("TimeRemaining", timeRemaining);
190 }
191