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#include <cassert>
#include <phosphor-logging/log.hpp>
#include <sdbusplus/exception.hpp>
#include <sys/sysinfo.h>
#include "bmc_state_manager.hpp"
namespace phosphor
{
namespace state
{
namespace manager
{
// When you see server:: you know we're referencing our base class
namespace server = sdbusplus::xyz::openbmc_project::State::server;
using namespace phosphor::logging;
using sdbusplus::exception::SdBusError;
constexpr auto obmcStandbyTarget = "obmc-standby.target";
constexpr auto signalDone = "done";
constexpr auto activeState = "active";
/* Map a transition to it's systemd target */
const std::map<server::BMC::Transition, const char*> SYSTEMD_TABLE = {
{server::BMC::Transition::Reboot, "reboot.target"}};
constexpr auto SYSTEMD_SERVICE = "org.freedesktop.systemd1";
constexpr auto SYSTEMD_OBJ_PATH = "/org/freedesktop/systemd1";
constexpr auto SYSTEMD_INTERFACE = "org.freedesktop.systemd1.Manager";
constexpr auto SYSTEMD_PRP_INTERFACE = "org.freedesktop.DBus.Properties";
void BMC::discoverInitialState()
{
sdbusplus::message::variant<std::string> currentState;
sdbusplus::message::object_path unitTargetPath;
auto method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
SYSTEMD_INTERFACE, "GetUnit");
method.append(obmcStandbyTarget);
try
{
auto result = this->bus.call(method);
result.read(unitTargetPath);
}
catch (const SdBusError& e)
{
log<level::ERR>("Error in GetUnit call", entry("ERROR=%s", e.what()));
return;
}
method = this->bus.new_method_call(
SYSTEMD_SERVICE,
static_cast<const std::string&>(unitTargetPath).c_str(),
SYSTEMD_PRP_INTERFACE, "Get");
method.append("org.freedesktop.systemd1.Unit", "ActiveState");
try
{
auto result = this->bus.call(method);
// Is obmc-standby.target active or inactive?
result.read(currentState);
}
catch (const SdBusError& e)
{
log<level::INFO>("Error in ActiveState Get",
entry("ERROR=%s", e.what()));
return;
}
auto currentStateStr =
sdbusplus::message::variant_ns::get<std::string>(currentState);
if (currentStateStr == activeState)
{
log<level::INFO>("Setting the BMCState field",
entry("CURRENT_BMC_STATE=%s", "BMC_READY"));
this->currentBMCState(BMCState::Ready);
// Unsubscribe so we stop processing all other signals
method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
SYSTEMD_INTERFACE, "Unsubscribe");
try
{
this->bus.call(method);
this->stateSignal.release();
}
catch (const SdBusError& e)
{
log<level::INFO>("Error in Unsubscribe",
entry("ERROR=%s", e.what()));
}
}
else
{
log<level::INFO>("Setting the BMCState field",
entry("CURRENT_BMC_STATE=%s", "BMC_NOTREADY"));
this->currentBMCState(BMCState::NotReady);
}
return;
}
void BMC::subscribeToSystemdSignals()
{
auto method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
SYSTEMD_INTERFACE, "Subscribe");
try
{
this->bus.call(method);
}
catch (const SdBusError& e)
{
log<level::INFO>("Error in Subscribe", entry("ERROR=%s", e.what()));
}
return;
}
void BMC::executeTransition(const Transition tranReq)
{
// Check to make sure it can be found
auto iter = SYSTEMD_TABLE.find(tranReq);
if (iter == SYSTEMD_TABLE.end())
return;
const auto& sysdUnit = iter->second;
auto method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
SYSTEMD_INTERFACE, "StartUnit");
// The only valid transition is reboot and that
// needs to be irreversible once started
method.append(sysdUnit, "replace-irreversibly");
try
{
this->bus.call(method);
}
catch (const SdBusError& e)
{
log<level::INFO>("Error in StartUnit - replace-irreversibly",
entry("ERROR=%s", e.what()));
}
return;
}
int BMC::bmcStateChange(sdbusplus::message::message& msg)
{
uint32_t newStateID{};
sdbusplus::message::object_path newStateObjPath;
std::string newStateUnit{};
std::string newStateResult{};
// Read the msg and populate each variable
msg.read(newStateID, newStateObjPath, newStateUnit, newStateResult);
// Caught the signal that indicates the BMC is now BMC_READY
if ((newStateUnit == obmcStandbyTarget) && (newStateResult == signalDone))
{
log<level::INFO>("BMC_READY");
this->currentBMCState(BMCState::Ready);
// Unsubscribe so we stop processing all other signals
auto method =
this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
SYSTEMD_INTERFACE, "Unsubscribe");
try
{
this->bus.call(method);
this->stateSignal.release();
}
catch (const SdBusError& e)
{
log<level::INFO>("Error in Unsubscribe",
entry("ERROR=%s", e.what()));
}
}
return 0;
}
BMC::Transition BMC::requestedBMCTransition(Transition value)
{
log<level::INFO>("Setting the RequestedBMCTransition field",
entry("REQUESTED_BMC_TRANSITION=0x%s",
convertForMessage(value).c_str()));
executeTransition(value);
return server::BMC::requestedBMCTransition(value);
}
BMC::BMCState BMC::currentBMCState(BMCState value)
{
log<level::INFO>(
"Setting the BMCState field",
entry("CURRENT_BMC_STATE=0x%s", convertForMessage(value).c_str()));
return server::BMC::currentBMCState(value);
}
uint64_t BMC::lastRebootTime() const
{
using namespace std::chrono;
struct sysinfo info;
auto rc = sysinfo(&info);
assert(rc == 0);
// Since uptime is in seconds, also get the current time in seconds.
auto now = time_point_cast<seconds>(system_clock::now());
auto rebootTime = now - seconds(info.uptime);
return duration_cast<milliseconds>(rebootTime.time_since_epoch()).count();
}
} // namespace manager
} // namespace state
} // namespace phosphor
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