app/watchdog.cpp - openbmc/phosphor-host-ipmid - Gitiles

 #include "watchdog.hpp"

 #include "watchdog_service.hpp"

 #include <endian.h>

 #include <cstdint>
 #include <ipmid/api.hpp>
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/elog.hpp>
 #include <phosphor-logging/log.hpp>
 #include <string>
 #include <xyz/openbmc_project/Common/error.hpp>

 using phosphor::logging::commit;
 using phosphor::logging::level;
 using phosphor::logging::log;
 using sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;

 static bool lastCallSuccessful = false;

 void reportError()
 {
     // We don't want to fill the SEL with errors if the daemon dies and doesn't
     // come back but the watchdog keeps on ticking. Instead, we only report the
     // error if we haven't reported one since the last successful call
     if (!lastCallSuccessful)
     {
         return;
     }
     lastCallSuccessful = false;

     // TODO: This slow down the end of the IPMI transaction waiting
     // for the commit to finish. commit<>() can take at least 5 seconds
     // to complete. 5s is very slow for an IPMI command and ends up
     // congesting the IPMI channel needlessly, especially if the watchdog
     // is ticking fairly quickly and we have some transient issues.
     commit<InternalFailure>();
 }

 ipmi::RspType<> ipmiAppResetWatchdogTimer()
 {
     try
     {
         WatchdogService wd_service;

         // Notify the caller if we haven't initialized our timer yet
         // so it can configure actions and timeouts
         if (!wd_service.getInitialized())
         {
             lastCallSuccessful = true;

             constexpr uint8_t ccWatchdogNotInit = 0x80;
             return ipmi::response(ccWatchdogNotInit);
         }

         // The ipmi standard dictates we enable the watchdog during reset
         wd_service.resetTimeRemaining(true);
         lastCallSuccessful = true;
         return ipmi::responseSuccess();
     }
     catch (const InternalFailure& e)
     {
         reportError();
         return ipmi::responseUnspecifiedError();
     }
     catch (const std::exception& e)
     {
         const std::string e_str = std::string("wd_reset: ") + e.what();
         log<level::ERR>(e_str.c_str());
         reportError();
         return ipmi::responseUnspecifiedError();
     }
     catch (...)
     {
         log<level::ERR>("wd_reset: Unknown Error");
         reportError();
         return ipmi::responseUnspecifiedError();
     }
 }

 static constexpr uint8_t wd_dont_stop = 0x1 << 6;
 static constexpr uint8_t wd_timeout_action_mask = 0x3;

 static constexpr uint8_t wdTimerUseMask = 0x7;

 enum class IpmiAction : uint8_t
 {
     None = 0x0,
     HardReset = 0x1,
     PowerOff = 0x2,
     PowerCycle = 0x3,
 };

 /** @brief Converts an IPMI Watchdog Action to DBUS defined action
  *  @param[in] ipmi_action The IPMI Watchdog Action
  *  @return The Watchdog Action that the ipmi_action maps to
  */
 WatchdogService::Action ipmiActionToWdAction(IpmiAction ipmi_action)
 {
     switch (ipmi_action)
     {
         case IpmiAction::None:
         {
             return WatchdogService::Action::None;
         }
         case IpmiAction::HardReset:
         {
             return WatchdogService::Action::HardReset;
         }
         case IpmiAction::PowerOff:
         {
             return WatchdogService::Action::PowerOff;
         }
         case IpmiAction::PowerCycle:
         {
             return WatchdogService::Action::PowerCycle;
         }
         default:
         {
             throw std::domain_error("IPMI Action is invalid");
         }
     }
 }

 enum class IpmiTimerUse : uint8_t
 {
     Reserved = 0x0,
     BIOSFRB2 = 0x1,
     BIOSPOST = 0x2,
     OSLoad = 0x3,
     SMSOS = 0x4,
     OEM = 0x5,
 };

 WatchdogService::TimerUse ipmiTimerUseToWdTimerUse(IpmiTimerUse ipmiTimerUse)
 {
     switch (ipmiTimerUse)
     {
         case IpmiTimerUse::Reserved:
         {
             return WatchdogService::TimerUse::Reserved;
         }
         case IpmiTimerUse::BIOSFRB2:
         {
             return WatchdogService::TimerUse::BIOSFRB2;
         }
         case IpmiTimerUse::BIOSPOST:
         {
             return WatchdogService::TimerUse::BIOSPOST;
         }
         case IpmiTimerUse::OSLoad:
         {
             return WatchdogService::TimerUse::OSLoad;
         }
         case IpmiTimerUse::SMSOS:
         {
             return WatchdogService::TimerUse::SMSOS;
         }
         case IpmiTimerUse::OEM:
         {
             return WatchdogService::TimerUse::OEM;
         }
         default:
         {
             return WatchdogService::TimerUse::Reserved;
         }
     }
 }

 struct wd_set_req
 {
     uint8_t timer_use;
     uint8_t timer_action;
     uint8_t pretimeout; // (seconds)
     uint8_t expire_flags;
     uint16_t initial_countdown; // Little Endian (deciseconds)
 } __attribute__((packed));
 static_assert(sizeof(wd_set_req) == 6, "wd_set_req has invalid size.");
 static_assert(sizeof(wd_set_req) <= MAX_IPMI_BUFFER,
               "wd_get_res can't fit in request buffer.");

 ipmi_ret_t ipmi_app_watchdog_set(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                                  ipmi_request_t request,
                                  ipmi_response_t response,
                                  ipmi_data_len_t data_len,
                                  ipmi_context_t context)
 {
     // Extract the request data
     if (*data_len < sizeof(wd_set_req))
     {
         *data_len = 0;
         return IPMI_CC_REQ_DATA_LEN_INVALID;
     }
     wd_set_req req;
     memcpy(&req, request, sizeof(req));
     req.initial_countdown = le16toh(req.initial_countdown);
     *data_len = 0;

     try
     {
         WatchdogService wd_service;
         // Stop the timer if the don't stop bit is not set
         if (!(req.timer_use & wd_dont_stop))
         {
             wd_service.setEnabled(false);
         }

         // Set the action based on the request
         const auto ipmi_action =
             static_cast<IpmiAction>(req.timer_action & wd_timeout_action_mask);
         wd_service.setExpireAction(ipmiActionToWdAction(ipmi_action));

         const auto ipmiTimerUse =
             static_cast<IpmiTimerUse>(req.timer_use & wdTimerUseMask);
         wd_service.setTimerUse(ipmiTimerUseToWdTimerUse(ipmiTimerUse));

         // Set the new interval and the time remaining deci -> mill seconds
         const uint64_t interval = req.initial_countdown * 100;
         wd_service.setInterval(interval);
         wd_service.setTimeRemaining(interval);

         // Mark as initialized so that future resets behave correctly
         wd_service.setInitialized(true);

         lastCallSuccessful = true;
         return IPMI_CC_OK;
     }
     catch (const std::domain_error&)
     {
         return IPMI_CC_INVALID_FIELD_REQUEST;
     }
     catch (const InternalFailure& e)
     {
         reportError();
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
     catch (const std::exception& e)
     {
         const std::string e_str = std::string("wd_set: ") + e.what();
         log<level::ERR>(e_str.c_str());
         reportError();
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
     catch (...)
     {
         log<level::ERR>("wd_set: Unknown Error");
         reportError();
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
 }

 /** @brief Converts a DBUS Watchdog Action to IPMI defined action
  *  @param[in] wd_action The DBUS Watchdog Action
  *  @return The IpmiAction that the wd_action maps to
  */
 IpmiAction wdActionToIpmiAction(WatchdogService::Action wd_action)
 {
     switch (wd_action)
     {
         case WatchdogService::Action::None:
         {
             return IpmiAction::None;
         }
         case WatchdogService::Action::HardReset:
         {
             return IpmiAction::HardReset;
         }
         case WatchdogService::Action::PowerOff:
         {
             return IpmiAction::PowerOff;
         }
         case WatchdogService::Action::PowerCycle:
         {
             return IpmiAction::PowerCycle;
         }
         default:
         {
             // We have no method via IPMI to signal that the action is unknown
             // or unmappable in some way.
             // Just ignore the error and return NONE so the host can reconcile.
             return IpmiAction::None;
         }
     }
 }

 IpmiTimerUse wdTimerUseToIpmiTimerUse(WatchdogService::TimerUse wdTimerUse)
 {
     switch (wdTimerUse)
     {
         case WatchdogService::TimerUse::Reserved:
         {
             return IpmiTimerUse::Reserved;
         }
         case WatchdogService::TimerUse::BIOSFRB2:
         {
             return IpmiTimerUse::BIOSFRB2;
         }
         case WatchdogService::TimerUse::BIOSPOST:
         {
             return IpmiTimerUse::BIOSPOST;
         }
         case WatchdogService::TimerUse::OSLoad:
         {
             return IpmiTimerUse::OSLoad;
         }

         case WatchdogService::TimerUse::SMSOS:
         {
             return IpmiTimerUse::SMSOS;
         }
         case WatchdogService::TimerUse::OEM:
         {
             return IpmiTimerUse::OEM;
         }
         default:
         {
             return IpmiTimerUse::Reserved;
         }
     }
 }

 struct wd_get_res
 {
     uint8_t timer_use;
     uint8_t timer_action;
     uint8_t pretimeout;
     uint8_t expire_flags;
     uint16_t initial_countdown; // Little Endian (deciseconds)
     uint16_t present_countdown; // Little Endian (deciseconds)
 } __attribute__((packed));
 static_assert(sizeof(wd_get_res) == 8, "wd_get_res has invalid size.");
 static_assert(sizeof(wd_get_res) <= MAX_IPMI_BUFFER,
               "wd_get_res can't fit in response buffer.");

 static constexpr uint8_t wd_dont_log = 0x1 << 7;
 static constexpr uint8_t wd_running = 0x1 << 6;

 ipmi_ret_t ipmi_app_watchdog_get(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                                  ipmi_request_t request,
                                  ipmi_response_t response,
                                  ipmi_data_len_t data_len,
                                  ipmi_context_t context)
 {
     // Assume we will fail and send no data outside the return code
     *data_len = 0;

     try
     {
         WatchdogService wd_service;
         WatchdogService::Properties wd_prop = wd_service.getProperties();

         // Build and return the response
         wd_get_res res;
         res.timer_use = wd_dont_log;
         res.timer_action =
             static_cast<uint8_t>(wdActionToIpmiAction(wd_prop.expireAction));

         // Interval and timeRemaining need converted from milli -> deci seconds
         res.initial_countdown = htole16(wd_prop.interval / 100);
         if (wd_prop.enabled)
         {
             res.timer_use |= wd_running;
             res.present_countdown = htole16(wd_prop.timeRemaining / 100);
         }
         else
         {
             res.present_countdown = res.initial_countdown;
         }

         res.timer_use |=
             static_cast<uint8_t>(wdTimerUseToIpmiTimerUse(wd_prop.timerUse));

         // TODO: Do something about having pretimeout support
         res.pretimeout = 0;
         res.expire_flags = 0;
         memcpy(response, &res, sizeof(res));
         *data_len = sizeof(res);
         lastCallSuccessful = true;
         return IPMI_CC_OK;
     }
     catch (const InternalFailure& e)
     {
         reportError();
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
     catch (const std::exception& e)
     {
         const std::string e_str = std::string("wd_get: ") + e.what();
         log<level::ERR>(e_str.c_str());
         reportError();
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
     catch (...)
     {
         log<level::ERR>("wd_get: Unknown Error");
         reportError();
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
 }
	#include "watchdog.hpp"

	#include "watchdog_service.hpp"

	#include <endian.h>

	#include <cstdint>
	#include <ipmid/api.hpp>
	#include <phosphor-logging/elog-errors.hpp>
	#include <phosphor-logging/elog.hpp>
	#include <phosphor-logging/log.hpp>
	#include <string>
	#include <xyz/openbmc_project/Common/error.hpp>

	using phosphor::logging::commit;
	using phosphor::logging::level;
	using phosphor::logging::log;
	using sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;

	static bool lastCallSuccessful = false;

	void reportError()
	{
	// We don't want to fill the SEL with errors if the daemon dies and doesn't
	// come back but the watchdog keeps on ticking. Instead, we only report the
	// error if we haven't reported one since the last successful call
	if (!lastCallSuccessful)
	{
	return;
	}
	lastCallSuccessful = false;

	// TODO: This slow down the end of the IPMI transaction waiting
	// for the commit to finish. commit<>() can take at least 5 seconds
	// to complete. 5s is very slow for an IPMI command and ends up
	// congesting the IPMI channel needlessly, especially if the watchdog
	// is ticking fairly quickly and we have some transient issues.
	commit<InternalFailure>();
	}

	ipmi::RspType<> ipmiAppResetWatchdogTimer()
	{
	try
	{
	WatchdogService wd_service;

	// Notify the caller if we haven't initialized our timer yet
	// so it can configure actions and timeouts
	if (!wd_service.getInitialized())
	{
	lastCallSuccessful = true;

	constexpr uint8_t ccWatchdogNotInit = 0x80;
	return ipmi::response(ccWatchdogNotInit);
	}

	// The ipmi standard dictates we enable the watchdog during reset
	wd_service.resetTimeRemaining(true);
	lastCallSuccessful = true;
	return ipmi::responseSuccess();
	}
	catch (const InternalFailure& e)
	{
	reportError();
	return ipmi::responseUnspecifiedError();
	}
	catch (const std::exception& e)
	{
	const std::string e_str = std::string("wd_reset: ") + e.what();
	log<level::ERR>(e_str.c_str());
	reportError();
	return ipmi::responseUnspecifiedError();
	}
	catch (...)
	{
	log<level::ERR>("wd_reset: Unknown Error");
	reportError();
	return ipmi::responseUnspecifiedError();
	}
	}

	static constexpr uint8_t wd_dont_stop = 0x1 << 6;
	static constexpr uint8_t wd_timeout_action_mask = 0x3;

	static constexpr uint8_t wdTimerUseMask = 0x7;

	enum class IpmiAction : uint8_t
	{
	None = 0x0,
	HardReset = 0x1,
	PowerOff = 0x2,
	PowerCycle = 0x3,
	};

	/** @brief Converts an IPMI Watchdog Action to DBUS defined action
	* @param[in] ipmi_action The IPMI Watchdog Action
	* @return The Watchdog Action that the ipmi_action maps to
	*/
	WatchdogService::Action ipmiActionToWdAction(IpmiAction ipmi_action)
	{
	switch (ipmi_action)
	{
	case IpmiAction::None:
	{
	return WatchdogService::Action::None;
	}
	case IpmiAction::HardReset:
	{
	return WatchdogService::Action::HardReset;
	}
	case IpmiAction::PowerOff:
	{
	return WatchdogService::Action::PowerOff;
	}
	case IpmiAction::PowerCycle:
	{
	return WatchdogService::Action::PowerCycle;
	}
	default:
	{
	throw std::domain_error("IPMI Action is invalid");
	}
	}
	}

	enum class IpmiTimerUse : uint8_t
	{
	Reserved = 0x0,
	BIOSFRB2 = 0x1,
	BIOSPOST = 0x2,
	OSLoad = 0x3,
	SMSOS = 0x4,
	OEM = 0x5,
	};

	WatchdogService::TimerUse ipmiTimerUseToWdTimerUse(IpmiTimerUse ipmiTimerUse)
	{
	switch (ipmiTimerUse)
	{
	case IpmiTimerUse::Reserved:
	{
	return WatchdogService::TimerUse::Reserved;
	}
	case IpmiTimerUse::BIOSFRB2:
	{
	return WatchdogService::TimerUse::BIOSFRB2;
	}
	case IpmiTimerUse::BIOSPOST:
	{
	return WatchdogService::TimerUse::BIOSPOST;
	}
	case IpmiTimerUse::OSLoad:
	{
	return WatchdogService::TimerUse::OSLoad;
	}
	case IpmiTimerUse::SMSOS:
	{
	return WatchdogService::TimerUse::SMSOS;
	}
	case IpmiTimerUse::OEM:
	{
	return WatchdogService::TimerUse::OEM;
	}
	default:
	{
	return WatchdogService::TimerUse::Reserved;
	}
	}
	}

	struct wd_set_req
	{
	uint8_t timer_use;
	uint8_t timer_action;
	uint8_t pretimeout; // (seconds)
	uint8_t expire_flags;
	uint16_t initial_countdown; // Little Endian (deciseconds)
	} __attribute__((packed));
	static_assert(sizeof(wd_set_req) == 6, "wd_set_req has invalid size.");
	static_assert(sizeof(wd_set_req) <= MAX_IPMI_BUFFER,
	"wd_get_res can't fit in request buffer.");

	ipmi_ret_t ipmi_app_watchdog_set(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request,
	ipmi_response_t response,
	ipmi_data_len_t data_len,
	ipmi_context_t context)
	{
	// Extract the request data
	if (*data_len < sizeof(wd_set_req))
	{
	*data_len = 0;
	return IPMI_CC_REQ_DATA_LEN_INVALID;
	}
	wd_set_req req;
	memcpy(&req, request, sizeof(req));
	req.initial_countdown = le16toh(req.initial_countdown);
	*data_len = 0;

	try
	{
	WatchdogService wd_service;
	// Stop the timer if the don't stop bit is not set
	if (!(req.timer_use & wd_dont_stop))
	{
	wd_service.setEnabled(false);
	}

	// Set the action based on the request
	const auto ipmi_action =
	static_cast<IpmiAction>(req.timer_action & wd_timeout_action_mask);
	wd_service.setExpireAction(ipmiActionToWdAction(ipmi_action));

	const auto ipmiTimerUse =
	static_cast<IpmiTimerUse>(req.timer_use & wdTimerUseMask);
	wd_service.setTimerUse(ipmiTimerUseToWdTimerUse(ipmiTimerUse));

	// Set the new interval and the time remaining deci -> mill seconds
	const uint64_t interval = req.initial_countdown * 100;
	wd_service.setInterval(interval);
	wd_service.setTimeRemaining(interval);

	// Mark as initialized so that future resets behave correctly
	wd_service.setInitialized(true);

	lastCallSuccessful = true;
	return IPMI_CC_OK;
	}
	catch (const std::domain_error&)
	{
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}
	catch (const InternalFailure& e)
	{
	reportError();
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	catch (const std::exception& e)
	{
	const std::string e_str = std::string("wd_set: ") + e.what();
	log<level::ERR>(e_str.c_str());
	reportError();
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	catch (...)
	{
	log<level::ERR>("wd_set: Unknown Error");
	reportError();
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	}

	/** @brief Converts a DBUS Watchdog Action to IPMI defined action
	* @param[in] wd_action The DBUS Watchdog Action
	* @return The IpmiAction that the wd_action maps to
	*/
	IpmiAction wdActionToIpmiAction(WatchdogService::Action wd_action)
	{
	switch (wd_action)
	{
	case WatchdogService::Action::None:
	{
	return IpmiAction::None;
	}
	case WatchdogService::Action::HardReset:
	{
	return IpmiAction::HardReset;
	}
	case WatchdogService::Action::PowerOff:
	{
	return IpmiAction::PowerOff;
	}
	case WatchdogService::Action::PowerCycle:
	{
	return IpmiAction::PowerCycle;
	}
	default:
	{
	// We have no method via IPMI to signal that the action is unknown
	// or unmappable in some way.
	// Just ignore the error and return NONE so the host can reconcile.
	return IpmiAction::None;
	}
	}
	}

	IpmiTimerUse wdTimerUseToIpmiTimerUse(WatchdogService::TimerUse wdTimerUse)
	{
	switch (wdTimerUse)
	{
	case WatchdogService::TimerUse::Reserved:
	{
	return IpmiTimerUse::Reserved;
	}
	case WatchdogService::TimerUse::BIOSFRB2:
	{
	return IpmiTimerUse::BIOSFRB2;
	}
	case WatchdogService::TimerUse::BIOSPOST:
	{
	return IpmiTimerUse::BIOSPOST;
	}
	case WatchdogService::TimerUse::OSLoad:
	{
	return IpmiTimerUse::OSLoad;
	}

	case WatchdogService::TimerUse::SMSOS:
	{
	return IpmiTimerUse::SMSOS;
	}
	case WatchdogService::TimerUse::OEM:
	{
	return IpmiTimerUse::OEM;
	}
	default:
	{
	return IpmiTimerUse::Reserved;
	}
	}
	}

	struct wd_get_res
	{
	uint8_t timer_use;
	uint8_t timer_action;
	uint8_t pretimeout;
	uint8_t expire_flags;
	uint16_t initial_countdown; // Little Endian (deciseconds)
	uint16_t present_countdown; // Little Endian (deciseconds)
	} __attribute__((packed));
	static_assert(sizeof(wd_get_res) == 8, "wd_get_res has invalid size.");
	static_assert(sizeof(wd_get_res) <= MAX_IPMI_BUFFER,
	"wd_get_res can't fit in response buffer.");

	static constexpr uint8_t wd_dont_log = 0x1 << 7;
	static constexpr uint8_t wd_running = 0x1 << 6;

	ipmi_ret_t ipmi_app_watchdog_get(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request,
	ipmi_response_t response,
	ipmi_data_len_t data_len,
	ipmi_context_t context)
	{
	// Assume we will fail and send no data outside the return code
	*data_len = 0;

	try
	{
	WatchdogService wd_service;
	WatchdogService::Properties wd_prop = wd_service.getProperties();

	// Build and return the response
	wd_get_res res;
	res.timer_use = wd_dont_log;
	res.timer_action =
	static_cast<uint8_t>(wdActionToIpmiAction(wd_prop.expireAction));

	// Interval and timeRemaining need converted from milli -> deci seconds
	res.initial_countdown = htole16(wd_prop.interval / 100);
	if (wd_prop.enabled)
	{
	res.timer_use \|= wd_running;
	res.present_countdown = htole16(wd_prop.timeRemaining / 100);
	}
	else
	{
	res.present_countdown = res.initial_countdown;
	}

	res.timer_use \|=
	static_cast<uint8_t>(wdTimerUseToIpmiTimerUse(wd_prop.timerUse));

	// TODO: Do something about having pretimeout support
	res.pretimeout = 0;
	res.expire_flags = 0;
	memcpy(response, &res, sizeof(res));
	*data_len = sizeof(res);
	lastCallSuccessful = true;
	return IPMI_CC_OK;
	}
	catch (const InternalFailure& e)
	{
	reportError();
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	catch (const std::exception& e)
	{
	const std::string e_str = std::string("wd_get: ") + e.what();
	log<level::ERR>(e_str.c_str());
	reportError();
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	catch (...)
	{
	log<level::ERR>("wd_get: Unknown Error");
	reportError();
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	}