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#include "host_epoch.hpp"
#include "utils.hpp"
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/log.hpp>
#include <xyz/openbmc_project/Time/error.hpp>
namespace phosphor
{
namespace time
{
using namespace sdbusplus::xyz::openbmc_project::Time;
using namespace phosphor::logging;
using namespace std::chrono;
using NotAllowedError =
sdbusplus::xyz::openbmc_project::Time::Error::NotAllowed;
HostEpoch::HostEpoch(sdbusplus::bus::bus& bus, const char* objPath) :
EpochBase(bus, objPath),
offset(utils::readData<decltype(offset)::rep>(offsetFile))
{
// Initialize the diffToSteadyClock
auto steadyTime =
duration_cast<microseconds>(steady_clock::now().time_since_epoch());
diffToSteadyClock = getTime() + offset - steadyTime;
}
uint64_t HostEpoch::elapsed() const
{
auto ret = getTime();
if (timeOwner == Owner::Split)
{
ret += offset;
}
return ret.count();
}
uint64_t HostEpoch::elapsed(uint64_t value)
{
/*
Mode | Owner | Set Host Time
----- | ----- | -------------
NTP | BMC | Not allowed
NTP | HOST | Not allowed
NTP | SPLIT | OK, and just save offset
NTP | BOTH | Not allowed
MANUAL| BMC | Not allowed
MANUAL| HOST | OK, and set time to BMC
MANUAL| SPLIT | OK, and just save offset
MANUAL| BOTH | OK, and set time to BMC
*/
if (timeOwner == Owner::BMC ||
(timeMode == Mode::NTP &&
(timeOwner == Owner::Host || timeOwner == Owner::Both)))
{
using namespace xyz::openbmc_project::Time;
elog<NotAllowedError>(
NotAllowed::OWNER(utils::ownerToStr(timeOwner).c_str()),
NotAllowed::SYNC_METHOD(utils::modeToStr(timeMode).c_str()),
NotAllowed::REASON("Setting HostTime is not allowed"));
}
auto time = microseconds(value);
if (timeOwner == Owner::Split)
{
// Calculate the offset between host and bmc time
offset = time - getTime();
saveOffset();
// Calculate the diff between host and steady time
auto steadyTime =
duration_cast<microseconds>(steady_clock::now().time_since_epoch());
diffToSteadyClock = time - steadyTime;
}
else
{
// Set time to BMC
setTime(time);
}
server::EpochTime::elapsed(value);
return value;
}
void HostEpoch::onOwnerChanged(Owner owner)
{
// If timeOwner is changed to SPLIT, the offset shall be preserved
// Otherwise it shall be cleared;
timeOwner = owner;
if (timeOwner != Owner::Split)
{
offset = microseconds(0);
saveOffset();
}
else
{
// In SPLIT, need to re-calculate the diff between
// host and steady time
auto steadyTime =
duration_cast<microseconds>(steady_clock::now().time_since_epoch());
diffToSteadyClock = getTime() - steadyTime;
}
}
void HostEpoch::saveOffset()
{
// Store the offset to file
utils::writeData(offsetFile, offset.count());
}
void HostEpoch::onBmcTimeChanged(const microseconds& bmcTime)
{
// If owner is split and BMC time is changed,
// the offset shall be adjusted
if (timeOwner == Owner::Split)
{
auto steadyTime =
duration_cast<microseconds>(steady_clock::now().time_since_epoch());
auto hostTime = steadyTime + diffToSteadyClock;
offset = hostTime - bmcTime;
saveOffset();
}
}
} // namespace time
} // namespace phosphor
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