blob: 25f6fce13eff26f760ff5f7a37042ca5df711703 [file] [log] [blame]
#include "side_switch.hpp"
#include "utils.hpp"
#include <phosphor-logging/lg2.hpp>
#include <exception>
#include <string>
#include <thread>
#include <variant>
#include <vector>
PHOSPHOR_LOG2_USING;
bool sideSwitchNeeded(sdbusplus::bus_t& bus)
{
std::string fwRunningVersionPath;
uint8_t fwRunningPriority = 0;
// Get active image
try
{
std::vector<std::string> paths =
utils::getProperty<std::vector<std::string>>(
bus, "/xyz/openbmc_project/software/functional",
"xyz.openbmc_project.Association", "endpoints");
if (paths.size() != 1)
{
info("side-switch only supports BMC-purpose image systems");
return (false);
}
fwRunningVersionPath = paths[0];
info("Running firmware version path is {FW_PATH}", "FW_PATH",
fwRunningVersionPath);
}
catch (const std::exception& e)
{
error("failed to retrieve active firmware version: {ERROR}", "ERROR",
e);
return (false);
}
// Check if active image has highest priority (0)
try
{
fwRunningPriority = utils::getProperty<uint8_t>(
bus, fwRunningVersionPath.c_str(),
"xyz.openbmc_project.Software.RedundancyPriority", "Priority");
info("Running firmware version priority is {FW_PRIORITY}",
"FW_PRIORITY", fwRunningPriority);
}
catch (const std::exception& e)
{
error("failed to read priority from active image: {ERROR}", "ERROR", e);
return (false);
}
// If running at highest priority (0) then no side switch needed
if (fwRunningPriority == 0)
{
info("Running image is at priority 0, no side switch needed");
return (false);
}
// Need to check if any other BMC images on system have a higher priority
std::vector<std::string> allSoftwarePaths;
try
{
auto method = bus.new_method_call("xyz.openbmc_project.ObjectMapper",
"/xyz/openbmc_project/object_mapper",
"xyz.openbmc_project.ObjectMapper",
"GetSubTreePaths");
method.append("/xyz/openbmc_project/software");
method.append(0); // Depth 0 to search all
method.append(
std::vector<std::string>({"xyz.openbmc_project.Software.Version"}));
auto reply = bus.call(method);
reply.read(allSoftwarePaths);
if (allSoftwarePaths.size() <= 1)
{
info("only 1 image present in flash so no side switch needed");
return (false);
}
}
catch (const std::exception& e)
{
error("failed to retrieve all firmware versions: {ERROR}", "ERROR", e);
return (false);
}
// Cycle through all firmware images looking for a BMC version that
// has a higher priority then our running image
for (auto& fwPath : allSoftwarePaths)
{
if (fwPath == fwRunningVersionPath)
{
info("{FW_PATH} is the running image, skip", "FW_PATH", fwPath);
continue;
}
try
{
uint8_t thisPathPri = utils::getProperty<uint8_t>(
bus, fwPath.c_str(),
"xyz.openbmc_project.Software.RedundancyPriority", "Priority");
if (thisPathPri < fwRunningPriority)
{
info(
"{FW_PATH} has a higher priority, {FW_PRIORITY}, then running priority",
"FW_PATH", fwPath, "FW_PRIORITY", thisPathPri);
return (true);
}
}
catch (const std::exception& e)
{
// This could just be a host firmware image, just keep going
info("failed to read a BMC priority from {FW_PATH}: {ERROR}",
"FW_PATH", fwPath, "ERROR", e);
continue;
}
}
return (false);
}
bool powerOffSystem(sdbusplus::bus_t& bus)
{
try
{
utils::PropertyValue chassOff =
"xyz.openbmc_project.State.Chassis.Transition.Off";
utils::setProperty(bus, "/xyz/openbmc_project/state/chassis0",
"xyz.openbmc_project.State.Chassis",
"RequestedPowerTransition", chassOff);
}
catch (const std::exception& e)
{
error("chassis off request failed: {ERROR}", "ERROR", e);
return (false);
}
// Now just wait for host and power to turn off
// Worst case is a systemd service hangs in power off for 2 minutes so
// take that and double it to avoid any timing issues. The user has
// requested we switch to the other side, so a lengthy delay is warranted
// if needed. On most systems the power off takes 5-15 seconds.
for (int i = 0; i < 240; i++)
{
std::this_thread::sleep_for(std::chrono::milliseconds(1000));
try
{
// First wait for host to be off
auto currentHostState = utils::getProperty<std::string>(
bus, "/xyz/openbmc_project/state/host0",
"xyz.openbmc_project.State.Host", "CurrentHostState");
if (currentHostState ==
"xyz.openbmc_project.State.Host.HostState.Off")
{
info("host is off");
}
else
{
continue;
}
// Then verify chassis power is off
auto currentPwrState = utils::getProperty<std::string>(
bus, "/xyz/openbmc_project/state/chassis0",
"xyz.openbmc_project.State.Chassis", "CurrentPowerState");
if (currentPwrState ==
"xyz.openbmc_project.State.Chassis.PowerState.Off")
{
info("chassis power is off");
return (true);
}
else
{
continue;
}
}
catch (const std::exception& e)
{
error("reading chassis power state failed: {ERROR}", "ERROR", e);
return (false);
}
}
error("timeout waiting for chassis power to turn off");
return (false);
}
bool setAutoPowerRestart(sdbusplus::bus_t& bus)
{
try
{
// Set the one-time power on policy to AlwaysOn so system auto boots
// after BMC reboot
utils::PropertyValue restorePolicyOn =
"xyz.openbmc_project.Control.Power.RestorePolicy.Policy.AlwaysOn";
utils::setProperty(
bus,
"/xyz/openbmc_project/control/host0/power_restore_policy/one_time",
"xyz.openbmc_project.Control.Power.RestorePolicy",
"PowerRestorePolicy", restorePolicyOn);
}
catch (const std::exception& e)
{
error("setting power policy to always on failed: {ERROR}", "ERROR", e);
return (false);
}
info("RestorePolicy set to AlwaysOn");
return (true);
}
bool rebootTheBmc(sdbusplus::bus_t& bus)
{
try
{
utils::PropertyValue bmcReboot =
"xyz.openbmc_project.State.BMC.Transition.Reboot";
utils::setProperty(bus, "/xyz/openbmc_project/state/bmc0",
"xyz.openbmc_project.State.BMC",
"RequestedBMCTransition", bmcReboot);
}
catch (const std::exception& e)
{
error("rebooting the bmc failed: {ERROR}", "ERROR", e);
return (false);
}
info("BMC reboot initiated");
return (true);
}
int main()
{
info("Checking for side switch reboot");
auto bus = sdbusplus::bus::new_default();
if (!sideSwitchNeeded(bus))
{
info("Side switch not needed");
return 0;
}
if (!powerOffSystem(bus))
{
error("unable to power off chassis");
return 0;
}
if (!setAutoPowerRestart(bus))
{
error("unable to set the auto power on restart policy");
// system has been powered off, best to at least continue and
// switch to new firmware image so continue
}
if (!rebootTheBmc(bus))
{
error("unable to reboot the BMC");
// Return invalid rc to trigger systemd target recovery and appropriate
// error logging
return -1;
}
return 0;
}