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#include "util.hpp"
#include <cmath>
#include <iostream>
#include <phosphor-logging/log.hpp>
#include <set>
#include <variant>
using Property = std::string;
using Value = std::variant<int64_t, double, std::string, bool>;
using PropertyMap = std::map<Property, Value>;
using namespace phosphor::logging;
/* TODO(venture): Basically all phosphor apps need this, maybe it should be a
* part of sdbusplus. There is an old version in libmapper.
*/
std::string DbusHelper::getService(sdbusplus::bus::bus& bus,
const std::string& intf,
const std::string& path)
{
auto mapper =
bus.new_method_call("xyz.openbmc_project.ObjectMapper",
"/xyz/openbmc_project/object_mapper",
"xyz.openbmc_project.ObjectMapper", "GetObject");
mapper.append(path);
mapper.append(std::vector<std::string>({intf}));
std::map<std::string, std::vector<std::string>> response;
try
{
auto responseMsg = bus.call(mapper);
responseMsg.read(response);
}
catch (const sdbusplus::exception::SdBusError& ex)
{
log<level::ERR>("ObjectMapper call failure",
entry("WHAT=%s", ex.what()));
throw;
}
if (response.begin() == response.end())
{
throw std::runtime_error("Unable to find Object: " + path);
}
return response.begin()->first;
}
void DbusHelper::getProperties(sdbusplus::bus::bus& bus,
const std::string& service,
const std::string& path,
struct SensorProperties* prop)
{
auto pimMsg = bus.new_method_call(service.c_str(), path.c_str(),
propertiesintf.c_str(), "GetAll");
pimMsg.append(sensorintf);
PropertyMap propMap;
try
{
auto valueResponseMsg = bus.call(pimMsg);
valueResponseMsg.read(propMap);
}
catch (const sdbusplus::exception::SdBusError& ex)
{
log<level::ERR>("GetAll Properties Failed",
entry("WHAT=%s", ex.what()));
throw;
}
// The PropertyMap returned will look like this because it's always
// reading a Sensor.Value interface.
// a{sv} 3:
// "Value" x 24875
// "Unit" s "xyz.openbmc_project.Sensor.Value.Unit.DegreesC"
// "Scale" x -3
// If no error was set, the values should all be there.
auto findUnit = propMap.find("Unit");
if (findUnit != propMap.end())
{
prop->unit = std::get<std::string>(findUnit->second);
}
auto findScale = propMap.find("Scale");
auto findMax = propMap.find("MaxValue");
auto findMin = propMap.find("MinValue");
prop->min = 0;
prop->max = 0;
prop->scale = 0;
if (findScale != propMap.end())
{
prop->scale = std::get<int64_t>(findScale->second);
}
if (findMax != propMap.end())
{
prop->max = std::visit(VariantToDoubleVisitor(), findMax->second);
}
if (findMin != propMap.end())
{
prop->min = std::visit(VariantToDoubleVisitor(), findMin->second);
}
prop->value = std::visit(VariantToDoubleVisitor(), propMap["Value"]);
return;
}
bool DbusHelper::thresholdsAsserted(sdbusplus::bus::bus& bus,
const std::string& service,
const std::string& path)
{
auto critical = bus.new_method_call(service.c_str(), path.c_str(),
propertiesintf.c_str(), "GetAll");
critical.append(criticalThreshInf);
PropertyMap criticalMap;
try
{
auto msg = bus.call(critical);
msg.read(criticalMap);
}
catch (sdbusplus::exception_t&)
{
// do nothing, sensors don't have to expose critical thresholds
return false;
}
auto findCriticalLow = criticalMap.find("CriticalAlarmLow");
auto findCriticalHigh = criticalMap.find("CriticalAlarmHigh");
bool asserted = false;
if (findCriticalLow != criticalMap.end())
{
asserted = std::get<bool>(findCriticalLow->second);
}
// as we are catching properties changed, a sensor could theoretically jump
// from one threshold to the other in one event, so check both thresholds
if (!asserted && findCriticalHigh != criticalMap.end())
{
asserted = std::get<bool>(findCriticalHigh->second);
}
return asserted;
}
std::string getSensorPath(const std::string& type, const std::string& id)
{
std::string layer = type;
if (type == "fan")
{
layer = "fan_tach";
}
else if (type == "temp")
{
layer = "temperature";
}
else
{
layer = "unknown"; // TODO(venture): Need to handle.
}
return std::string("/xyz/openbmc_project/sensors/" + layer + "/" + id);
}
std::string getMatch(const std::string& type, const std::string& id)
{
return std::string("type='signal',"
"interface='org.freedesktop.DBus.Properties',"
"member='PropertiesChanged',"
"path='" +
getSensorPath(type, id) + "'");
}
bool validType(const std::string& type)
{
static std::set<std::string> valid = {"fan", "temp"};
return (valid.find(type) != valid.end());
}
void scaleSensorReading(const double min, const double max, double& value)
{
if (max <= 0 || max <= min)
{
return;
}
value /= (max - min);
}
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