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 Samsung Electronics 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 "space_info.h"
  
  #include <string>
  
  #include "src/array_mgmt/array_manager.h"
  #include "src/array_models/interface/i_array_info.h"
  #include "src/include/array_config.h"
  #include "src/logger/logger.h"
  #include "src/volume/volume_service.h"
  
  namespace pos
  {
  bool
  SpaceInfo::IsEnough(std::string& arrayName, uint64_t size)
  {
      return Remaining(arrayName) >= size;
  }
  
  uint64_t
  SpaceInfo::OPSize(std::string& arrayName)
  {
      uint64_t capa = TotalCapacity(arrayName);
      return (uint64_t)(capa * ArrayConfig::OVER_PROVISIONING_RATIO / 100);
  }
  
  uint64_t
  SpaceInfo::TotalCapacity(std::string& arrayName)
  {
      ComponentsInfo* info = ArrayMgr()->GetInfo(arrayName);
      if (info != nullptr)
      {
          const PartitionLogicalSize* ptnSize =
              info->arrayInfo->GetSizeInfo(PartitionType::USER_DATA);
  
          if (ptnSize != nullptr)
          {
              uint64_t dataBlks = ptnSize->blksPerStripe;
              return ptnSize->totalStripes * dataBlks * ArrayConfig::BLOCK_SIZE_BYTE;
          }
      }
      return 0;
  }
  
  uint64_t
  SpaceInfo::SystemCapacity(std::string& arrayName)
  {
      uint64_t total = TotalCapacity(arrayName);
      uint64_t op = OPSize(arrayName);
      POS_TRACE_INFO(9000, "SystemCapacity: total:{} - op:{} = sys:{} ",
          total, op, total - op);
      return total - op;
  }
  
  uint64_t
  SpaceInfo::Used(std::string& arrayName)
  {
      uint64_t usedSize = 0;
      IVolumeInfoManager* volMgr =
          VolumeServiceSingleton::Instance()->GetVolumeManager(arrayName);
  
      if (volMgr != nullptr)
      {
          usedSize = volMgr->EntireVolumeSize();
      }
  
      return usedSize;
  }
  
  uint64_t
  SpaceInfo::Remaining(std::string& arrayName)
  {
      return SystemCapacity(arrayName) - Used(arrayName);
  }
  
  } // namespace pos
  