text: /*
   *   BSD LICENSE
   *   Copyright (c) 2021 Samsung Electronics Corporation
   *   All rights reserved.
   *
   *   Redistribution and use in source and binary forms, with or without
   *   modification, are permitted provided that the following conditions
   *   are met:
   *
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in
   *       the documentation and/or other materials provided with the
   *       distribution.
   *     * Neither the name of Intel Corporation nor the names of its
   *       contributors may be used to endorse or promote products derived
   *       from this software without specific prior written permission.
   *
   *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "src/event_scheduler/io_completer.h"
  
  #include "src/bio/ubio.h"
  #include "src/event_scheduler/callback.h"
  #include "src/event_scheduler/event_scheduler.h"
  #include "src/event_scheduler/spdk_event_scheduler.h"
  #include "src/include/core_const.h"
  #include "src/spdk_wrapper/event_framework_api.h"
  #include "src/event_scheduler/event_factory.h"
  
  namespace pos
  {
  
  EventFactory* IoCompleter::recoveryEventFactory = nullptr;
  
  IoCompleter::IoCompleter(UbioSmartPtr ubio)
  : ubio(ubio)
  {
  }
  
  void
  IoCompleter::CompleteOriginUbio(void)
  {
      UbioSmartPtr origin = ubio->GetOriginUbio();
      if (origin != nullptr)
      {
          CallbackSmartPtr callee = origin->GetCallback();
          origin->ClearCallback();
          CallbackSmartPtr callback = ubio->GetCallback();
          if (callback != nullptr)
          {
              callback->SetCallee(callee);
              origin->Complete(IOErrorType::SUCCESS);
          }
          ubio->ClearOrigin();
      }
  }
  
  void
  IoCompleter::CompleteUbio(IOErrorType errorType, bool executeCallback)
  {
      bool ioFailed = (errorType != IOErrorType::SUCCESS);
      bool recoveryAllowed = ubio->CheckRecoveryAllowed();
      if (ioFailed && recoveryAllowed)
      {
          _SubmitRecovery(ubio);
          return;
      }
  
      CompleteUbioWithoutRecovery(errorType, executeCallback);
  }
  
  
  void
  IoCompleter::CompleteUbioWithoutRecovery(IOErrorType errorType, bool executeCallback)
  {
      ubio->Complete(errorType);
  
      bool asyncMode = (false == ubio->IsSyncMode());
  
      if (executeCallback && asyncMode)
      {
          CallbackSmartPtr callback = ubio->GetCallback();
          ubio->ClearCallback();
          callback->InformError(errorType);
  
          uint32_t originCore = ubio->GetOriginCore();
  
          bool done = false;
          if (originCore != INVALID_CORE)
          {
              bool keepCurrentReactor =
                  EventFrameworkApiSingleton::Instance()->IsSameReactorNow(originCore);
              if (keepCurrentReactor)
              {
                  done = callback->Execute();
              }
              else
              {
                  done = SpdkEventScheduler::SendSpdkEvent(originCore, callback);
              }
          }
  
          if (false == done)
          {
              EventSchedulerSingleton::Instance()->EnqueueEvent(callback);
          }
      }
  }
  
  void
  IoCompleter::_SubmitRecovery(UbioSmartPtr ubio)
  {
      ubio->SetError(IOErrorType::DEVICE_ERROR);
      if (recoveryEventFactory == nullptr)
      {
          assert(0);
          return;
      }
      EventSmartPtr failure = recoveryEventFactory->Create(ubio);
      EventSchedulerSingleton::Instance()->EnqueueEvent(failure);
  }
  
  void
  IoCompleter::RegisterRecoveryEventFactory(EventFactory* recoveryEventFactory)
  {
      IoCompleter::recoveryEventFactory = recoveryEventFactory;
  }
  
  } // namespace pos
  