bsp_q7s/core/CoreController.cpp

@@ -56,6 +56,7 @@ CoreController::CoreController(object_id_t objectId)
   } catch (const std::filesystem::filesystem_error &e) {
     sif::error << "CoreController::CoreController: Failed with exception " << e.what() << std::endl;
   }
+  sdCardCheckCd.timeOut();
   eventQueue = QueueFactory::instance()->createMessageQueue(5, EventMessage::MAX_MESSAGE_SIZE);
 }
 
@@ -77,6 +78,10 @@ void CoreController::performControlOperation() {
   performWatchdogControlOperation();
   sdStateMachine();
   performMountedSdCardOperations();
+  if (sdCardCheckCd.hasTimedOut()) {
+    performSdCardCheck();
+    sdCardCheckCd.resetTimer();
+  }
   readHkData();
   opDivider5.checkAndIncrement();
   opDivider10.checkAndIncrement();
@@ -134,6 +139,9 @@ ReturnValue_t CoreController::initialize() {
 
 ReturnValue_t CoreController::initializeAfterTaskCreation() {
   ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
+  sdInfo.pref = sdcMan->getPreferredSdCard();
+  sdcMan->setActiveSdCard(sdInfo.pref);
+  currMntPrefix = sdcMan->getCurrentMountPrefix();
   if (BLOCKING_SD_INIT) {
     ReturnValue_t result = initSdCardBlocking();
     if (result != HasReturnvaluesIF::RETURN_OK and result != SdCardManager::ALREADY_MOUNTED) {
@@ -165,7 +173,7 @@ ReturnValue_t CoreController::executeAction(ActionId_t actionId, MessageQueueId_
       if (size < 1) {
         return HasActionsIF::INVALID_PARAMETERS;
       }
-      std::string path = sdcMan->getCurrentMountPrefix(sdInfo.pref) + REBOOT_FILE;
+      std::string path = sdcMan->getCurrentMountPrefix() + REBOOT_FILE;
       // Disable the reboot file mechanism
       parseRebootFile(path, rebootFile);
       if (data[0] == 0) {
@@ -205,7 +213,7 @@ ReturnValue_t CoreController::executeAction(ActionId_t actionId, MessageQueueId_
       if (size < 1) {
         return HasActionsIF::INVALID_PARAMETERS;
       }
-      std::string path = sdcMan->getCurrentMountPrefix(sdInfo.pref) + REBOOT_FILE;
+      std::string path = sdcMan->getCurrentMountPrefix() + REBOOT_FILE;
       // Disable the reboot file mechanism
       parseRebootFile(path, rebootFile);
       rebootFile.maxCount = data[0];
@@ -242,13 +250,12 @@ ReturnValue_t CoreController::initSdCardBlocking() {
   return HasReturnvaluesIF::RETURN_OK;
 #else
 
-  result = sdcMan->getSdCardActiveStatus(sdInfo.currentState);
+  result = sdcMan->getSdCardsStatus(sdInfo.currentState);
   if (result != HasReturnvaluesIF::RETURN_OK) {
     sif::warning << "Getting SD card activity status failed" << std::endl;
   }
 
 #if Q7S_SD_CARD_CONFIG == Q7S_SD_COLD_REDUNDANT
-  determinePreferredSdCard();
   updateSdInfoOther();
   sif::info << "Cold redundant SD card configuration, preferred SD card: "
             << static_cast<int>(sdInfo.pref) << std::endl;
@@ -329,8 +336,8 @@ ReturnValue_t CoreController::sdStateMachine() {
 
   if (sdInfo.state == SdStates::SET_STATE_SELF) {
     if (not sdInfo.commandExecuted) {
-      result = sdcMan->getSdCardActiveStatus(sdInfo.currentState);
+      result = sdcMan->getSdCardsStatus(sdInfo.currentState);
-      determinePreferredSdCard();
+      sdInfo.pref = sdcMan->getPreferredSdCard();
       updateSdInfoOther();
       if (sdInfo.pref != sd::SdCard::SLOT_0 and sdInfo.pref != sd::SdCard::SLOT_1) {
         sif::warning << "Preferred SD card invalid. Setting to card 0.." << std::endl;
@@ -473,7 +480,7 @@ ReturnValue_t CoreController::sdStateMachine() {
     sdInfo.state = SdStates::IDLE;
     sdInfo.cycleCount = 0;
     sdcMan->setBlocking(false);
-    sdcMan->getSdCardActiveStatus(sdInfo.currentState);
+    sdcMan->getSdCardsStatus(sdInfo.currentState);
     if (not sdInfo.initFinished) {
       updateSdInfoOther();
       sdInfo.initFinished = true;
@@ -951,25 +958,6 @@ ReturnValue_t CoreController::gracefulShutdownTasks(xsc::Chip chip, xsc::Copy co
 
 CoreController::~CoreController() {}
 
-void CoreController::determinePreferredSdCard() {
-  if (sdInfo.pref == sd::SdCard::NONE) {
-    ReturnValue_t result = sdcMan->getPreferredSdCard(sdInfo.pref);
-    if (result != HasReturnvaluesIF::RETURN_OK) {
-      if (result == scratch::KEY_NOT_FOUND) {
-        sif::warning << "CoreController::sdCardInit: "
-                        "Preferred SD card not set. Setting to 0"
-                     << std::endl;
-        sdcMan->setPreferredSdCard(sd::SdCard::SLOT_0);
-        sdInfo.pref = sd::SdCard::SLOT_0;
-      } else {
-        sif::warning << "CoreController::sdCardInit: Could not get preferred SD card"
-                        "information from the scratch buffer"
-                     << std::endl;
-      }
-    }
-  }
-}
-
 void CoreController::updateSdInfoOther() {
   if (sdInfo.pref == sd::SdCard::SLOT_0) {
     sdInfo.prefChar = "0";
@@ -1253,24 +1241,73 @@ void CoreController::performWatchdogControlOperation() {
 }
 
 void CoreController::performMountedSdCardOperations() {
-  currMntPrefix = sdcMan->getCurrentMountPrefix();
+  auto mountedSdCardOp = [&](bool &mntSwitch, sd::SdCard sdCard, std::string mntPoint) {
-  if (doPerformMountedSdCardOps) {
+    if (mntSwitch) {
-    bool sdCardMounted = false;
+      bool sdCardMounted = sdcMan->isSdCardMounted(sdCard);
-    sdCardMounted = sdcMan->isSdCardMounted(sdInfo.pref);
+      if (sdCardMounted and not performOneShotSdCardOpsSwitch) {
-    if (sdCardMounted) {
+        std::ostringstream path;
-      std::string path = currMntPrefix + "/" + CONF_FOLDER;
+        path << mntPoint << "/" << CONF_FOLDER;
-      if (not std::filesystem::exists(path)) {
+        if (not std::filesystem::exists(path.str())) {
-        std::filesystem::create_directory(path);
+          std::filesystem::create_directory(path.str());
+        }
+        initVersionFile();
+        initClockFromTimeFile();
+        performRebootFileHandling(false);
+        performOneShotSdCardOpsSwitch = true;
       }
-      initVersionFile();
+      mntSwitch = false;
-      initClockFromTimeFile();
-      performRebootFileHandling(false);
-      doPerformMountedSdCardOps = false;
     }
+  };
+  if (sdInfo.pref == sd::SdCard::SLOT_1) {
+    mountedSdCardOp(sdInfo.mountSwitch.second, sd::SdCard::SLOT_1, SdCardManager::SD_1_MOUNT_POINT);
+    mountedSdCardOp(sdInfo.mountSwitch.first, sd::SdCard::SLOT_0, SdCardManager::SD_0_MOUNT_POINT);
+  } else {
+    mountedSdCardOp(sdInfo.mountSwitch.first, sd::SdCard::SLOT_0, SdCardManager::SD_0_MOUNT_POINT);
+    mountedSdCardOp(sdInfo.mountSwitch.second, sd::SdCard::SLOT_1, SdCardManager::SD_1_MOUNT_POINT);
   }
   timeFileHandler();
 }
 
+ReturnValue_t CoreController::performSdCardCheck() {
+  bool mountedReadOnly = false;
+  SdCardManager::SdStatePair active;
+  sdcMan->getSdCardsStatus(active);
+  auto sdCardCheck = [&](sd::SdCard sdCard) {
+    ReturnValue_t result = sdcMan->isSdCardMountedReadOnly(sdCard, mountedReadOnly);
+    if (result != HasReturnvaluesIF::RETURN_OK) {
+      sif::error << "CoreController::performSdCardCheck: Could not check "
+                    "read-only mount state"
+                 << std::endl;
+      mountedReadOnly = true;
+    }
+    if (mountedReadOnly) {
+      int linuxErrno = 0;
+      result = sdcMan->performFsck(sdCard, true, linuxErrno);
+      if (result != HasReturnvaluesIF::RETURN_OK) {
+        sif::error << "CoreController::performSdCardCheck: fsck command on SD Card "
+                   << static_cast<uint8_t>(sdCard) << " failed with code " << linuxErrno << " | "
+                   << strerror(linuxErrno);
+      }
+      result = sdcMan->remountReadWrite(sdCard);
+      if (result == HasReturnvaluesIF::RETURN_OK) {
+        sif::warning << "CoreController::performSdCardCheck: Remounted SD Card "
+                     << static_cast<uint8_t>(sdCard) << " read-write";
+      } else {
+        sif::error << "CoreController::performSdCardCheck: Remounting SD Card "
+                   << static_cast<uint8_t>(sdCard) << " read-write failed";
+      }
+    }
+  };
+  if (active.first == sd::SdState::MOUNTED) {
+    sdCardCheck(sd::SdCard::SLOT_0);
+  }
+  if (active.second == sd::SdState::MOUNTED) {
+    sdCardCheck(sd::SdCard::SLOT_1);
+  }
+
+  return RETURN_OK;
+}
+
 void CoreController::performRebootFileHandling(bool recreateFile) {
   using namespace std;
   std::string path = currMntPrefix + REBOOT_FILE;
@@ -1696,7 +1733,7 @@ void CoreController::rewriteRebootFile(RebootFile file) {
 }
 
 void CoreController::setRebootMechanismLock(bool lock, xsc::Chip tgtChip, xsc::Copy tgtCopy) {
-  std::string path = sdcMan->getCurrentMountPrefix(sdInfo.pref) + REBOOT_FILE;
+  std::string path = currMntPrefix + REBOOT_FILE;
   // Disable the reboot file mechanism
   parseRebootFile(path, rebootFile);
   if (tgtChip == xsc::CHIP_0) {

bsp_q7s/core/CoreController.h

@@ -162,11 +162,12 @@ class CoreController : public ExtendedControllerBase {
 
   struct SdInfo {
     sd::SdCard pref = sd::SdCard::NONE;
-    sd::SdState prefState = sd::SdState::OFF;
     sd::SdCard other = sd::SdCard::NONE;
+    sd::SdState prefState = sd::SdState::OFF;
     sd::SdState otherState = sd::SdState::OFF;
     std::string prefChar = "0";
     std::string otherChar = "1";
+    std::pair<bool, bool> mountSwitch = {true, true};
     SdStates state = SdStates::START;
     // Used to track whether a command was executed
     bool commandExecuted = true;
@@ -182,7 +183,7 @@ class CoreController : public ExtendedControllerBase {
   } sdInfo;
   RebootFile rebootFile = {};
   std::string currMntPrefix;
-  bool doPerformMountedSdCardOps = true;
+  bool performOneShotSdCardOpsSwitch = true;
 
   /**
    * Index 0: Chip 0 Copy 0
@@ -198,12 +199,14 @@ class CoreController : public ExtendedControllerBase {
 
   ReturnValue_t initializeLocalDataPool(localpool::DataPool& localDataPoolMap,
                                         LocalDataPoolManager& poolManager) override;
+  Countdown sdCardCheckCd = Countdown(120000);
   LocalPoolDataSetBase* getDataSetHandle(sid_t sid) override;
   ReturnValue_t checkModeCommand(Mode_t mode, Submode_t submode, uint32_t* msToReachTheMode);
   void performMountedSdCardOperations();
   ReturnValue_t initVersionFile();
 
   ReturnValue_t initClockFromTimeFile();
+  ReturnValue_t performSdCardCheck();
   ReturnValue_t timeFileHandler();
   ReturnValue_t initBootCopy();
   ReturnValue_t initWatchdogFifo();
@@ -217,7 +220,6 @@ class CoreController : public ExtendedControllerBase {
   ReturnValue_t sdColdRedundantBlockingInit();
 
   void currentStateSetter(sd::SdCard sdCard, sd::SdState newState);
-  void determinePreferredSdCard();
   void executeNextExternalSdCommand();
   void checkExternalSdCommandStatus();
   void performRebootFileHandling(bool recreateFile);

bsp_q7s/memory/FileSystemHandler.cpp

@@ -70,9 +70,8 @@ void FileSystemHandler::fileSystemHandlerLoop() {
 
 void FileSystemHandler::fileSystemCheckup() {
   SdCardManager::SdStatePair statusPair;
-  sdcMan->getSdCardActiveStatus(statusPair);
+  sdcMan->getSdCardsStatus(statusPair);
-  sd::SdCard preferredSdCard;
+  sd::SdCard preferredSdCard = sdcMan->getPreferredSdCard();
-  sdcMan->getPreferredSdCard(preferredSdCard);
   if ((preferredSdCard == sd::SdCard::SLOT_0) and (statusPair.first == sd::SdState::MOUNTED)) {
     currentMountPrefix = SdCardManager::SD_0_MOUNT_POINT;
   } else if ((preferredSdCard == sd::SdCard::SLOT_1) and
@@ -109,11 +108,7 @@ ReturnValue_t FileSystemHandler::initialize() {
                << std::endl;
   }
   sdcMan = SdCardManager::instance();
-  sd::SdCard preferredSdCard;
+  sd::SdCard preferredSdCard = sdcMan->getPreferredSdCard();
-  ReturnValue_t result = sdcMan->getPreferredSdCard(preferredSdCard);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
-    return result;
-  }
   if (preferredSdCard == sd::SdCard::SLOT_0) {
     currentMountPrefix = SdCardManager::SD_0_MOUNT_POINT;
   } else if (preferredSdCard == sd::SdCard::SLOT_1) {

bsp_q7s/memory/SdCardManager.cpp

@@ -16,23 +16,44 @@
 #include "linux/utility/utility.h"
 #include "scratchApi.h"
 
-SdCardManager* SdCardManager::factoryInstance = nullptr;
+SdCardManager* SdCardManager::INSTANCE = nullptr;
 
 SdCardManager::SdCardManager() : SystemObject(objects::SDC_MANAGER), cmdExecutor(256) {
   mutex = MutexFactory::instance()->createMutex();
+  MutexGuard mg(mutex);
+  uint8_t prefSdRaw = 0;
+  ReturnValue_t result = scratch::readNumber(scratch::PREFERED_SDC_KEY, prefSdRaw);
+
+  if (result != HasReturnvaluesIF::RETURN_OK) {
+    if (result == scratch::KEY_NOT_FOUND) {
+      sif::warning << "CoreController::sdCardInit: "
+                      "Preferred SD card not set. Setting to 0"
+                   << std::endl;
+      setPreferredSdCard(sd::SdCard::SLOT_0);
+      sdInfo.pref = sd::SdCard::SLOT_0;
+    } else {
+      // Should not happen.
+      // TODO: Maybe trigger event?
+      sif::error << "SdCardManager::SdCardManager: Reading preferred SD card from scratch"
+                    "buffer failed"
+                 << std::endl;
+      sdInfo.pref = sd::SdCard::SLOT_0;
+    }
+  }
+  sdInfo.pref = static_cast<sd::SdCard>(prefSdRaw);
 }
 
 SdCardManager::~SdCardManager() {}
 
 void SdCardManager::create() {
-  if (factoryInstance == nullptr) {
+  if (INSTANCE == nullptr) {
-    factoryInstance = new SdCardManager();
+    INSTANCE = new SdCardManager();
   }
 }
 
 SdCardManager* SdCardManager::instance() {
   SdCardManager::create();
-  return SdCardManager::factoryInstance;
+  return SdCardManager::INSTANCE;
 }
 
 ReturnValue_t SdCardManager::switchOnSdCard(sd::SdCard sdCard, bool doMountSdCard,
@@ -51,7 +72,7 @@ ReturnValue_t SdCardManager::switchOnSdCard(sd::SdCard sdCard, bool doMountSdCar
   if (statusPair == nullptr) {
     sdStatusPtr = std::make_unique<SdStatePair>();
     statusPair = sdStatusPtr.get();
-    result = getSdCardActiveStatus(*statusPair);
+    result = getSdCardsStatus(*statusPair);
     if (result != HasReturnvaluesIF::RETURN_OK) {
       return result;
     }
@@ -98,7 +119,7 @@ ReturnValue_t SdCardManager::switchOnSdCard(sd::SdCard sdCard, bool doMountSdCar
 ReturnValue_t SdCardManager::switchOffSdCard(sd::SdCard sdCard, bool doUnmountSdCard,
                                              SdStatePair* statusPair) {
   std::pair<sd::SdState, sd::SdState> active;
-  ReturnValue_t result = getSdCardActiveStatus(active);
+  ReturnValue_t result = getSdCardsStatus(active);
   if (result != HasReturnvaluesIF::RETURN_OK) {
     return result;
   }
@@ -165,7 +186,7 @@ ReturnValue_t SdCardManager::setSdCardState(sd::SdCard sdCard, bool on) {
   return result;
 }
 
-ReturnValue_t SdCardManager::getSdCardActiveStatus(SdStatePair& active) {
+ReturnValue_t SdCardManager::getSdCardsStatus(SdStatePair& active) {
   using namespace std;
   MutexGuard mg(mutex);
   if (not filesystem::exists(SD_STATE_FILE)) {
@@ -273,14 +294,14 @@ ReturnValue_t SdCardManager::sanitizeState(SdStatePair* statusPair, sd::SdCard p
     resetNonBlockingState = true;
   }
   if (prefSdCard == sd::SdCard::NONE) {
-    result = getPreferredSdCard(prefSdCard);
+    result = getPreferredSdCard();
     if (result != HasReturnvaluesIF::RETURN_OK) {
     }
   }
   if (statusPair == nullptr) {
     sdStatusPtr = std::make_unique<SdStatePair>();
     statusPair = sdStatusPtr.get();
-    getSdCardActiveStatus(*statusPair);
+    getSdCardsStatus(*statusPair);
   }
 
   if (statusPair->first == sd::SdState::ON) {
@@ -351,20 +372,21 @@ void SdCardManager::processSdStatusLine(std::pair<sd::SdState, sd::SdState>& act
   idx++;
 }
 
-ReturnValue_t SdCardManager::getPreferredSdCard(sd::SdCard& sdCard) const {
+sd::SdCard SdCardManager::getPreferredSdCard() const {
-  uint8_t prefSdCard = 0;
+  MutexGuard mg(mutex);
-  ReturnValue_t result = scratch::readNumber(scratch::PREFERED_SDC_KEY, prefSdCard);
+  auto res = mg.getLockResult();
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (res != RETURN_OK) {
-    return result;
+    sif::error << "SdCardManager::getPreferredSdCard: Lock error" << std::endl;
   }
-  sdCard = static_cast<sd::SdCard>(prefSdCard);
+  return sdInfo.pref;
-  return HasReturnvaluesIF::RETURN_OK;
 }
 
 ReturnValue_t SdCardManager::setPreferredSdCard(sd::SdCard sdCard) {
+  MutexGuard mg(mutex);
   if (sdCard == sd::SdCard::BOTH) {
     return HasReturnvaluesIF::RETURN_FAILED;
   }
+  sdInfo.pref = sdCard;
   return scratch::writeNumber(scratch::PREFERED_SDC_KEY, static_cast<uint8_t>(sdCard));
 }
 
@@ -383,14 +405,9 @@ ReturnValue_t SdCardManager::updateSdCardStateFile() {
   return result;
 }
 
-std::string SdCardManager::getCurrentMountPrefix(sd::SdCard prefSdCard) {
+std::string SdCardManager::getCurrentMountPrefix() const {
-  if (prefSdCard == sd::SdCard::NONE) {
+  MutexGuard mg(mutex);
-    ReturnValue_t result = getPreferredSdCard(prefSdCard);
+  if (sdInfo.active == sd::SdCard::SLOT_0) {
-    if (result != HasReturnvaluesIF::RETURN_OK) {
-      return SD_0_MOUNT_POINT;
-    }
-  }
-  if (prefSdCard == sd::SdCard::SLOT_0) {
     return SD_0_MOUNT_POINT;
   } else {
     return SD_1_MOUNT_POINT;
@@ -443,7 +460,7 @@ void SdCardManager::setPrintCommandOutput(bool print) { this->printCmdOutput = p
 
 bool SdCardManager::isSdCardMounted(sd::SdCard sdCard) {
   SdCardManager::SdStatePair active;
-  ReturnValue_t result = this->getSdCardActiveStatus(active);
+  ReturnValue_t result = this->getSdCardsStatus(active);
 
   if (result != HasReturnvaluesIF::RETURN_OK) {
     sif::debug << "SdCardManager::isSdCardMounted: Failed to get SD card active state";
@@ -466,3 +483,68 @@ bool SdCardManager::isSdCardMounted(sd::SdCard sdCard) {
   }
   return false;
 }
+
+ReturnValue_t SdCardManager::isSdCardMountedReadOnly(sd::SdCard sdcard, bool& readOnly) {
+  std::ostringstream command;
+  if (sdcard == sd::SdCard::SLOT_0) {
+    command << "grep -q '" << SD_0_MOUNT_POINT << " vfat ro,' /proc/mounts";
+  } else {
+    command << "grep -q '" << SD_1_MOUNT_POINT << " vfat ro,' /proc/mounts";
+  }
+  ReturnValue_t result = cmdExecutor.load(command.str(), true, false);
+  if (result != HasReturnvaluesIF::RETURN_OK) {
+    return result;
+  }
+  result = cmdExecutor.execute();
+  if (result != HasReturnvaluesIF::RETURN_OK) {
+    int exitStatus = cmdExecutor.getLastError();
+    if (exitStatus == 1) {
+      readOnly = false;
+      return RETURN_OK;
+    }
+    return result;
+  }
+  auto& readVec = cmdExecutor.getReadVector();
+  size_t readLen = strnlen(readVec.data(), readVec.size());
+  if (readLen == 0) {
+    readOnly = false;
+  }
+  readOnly = true;
+  return HasReturnvaluesIF::RETURN_OK;
+}
+
+ReturnValue_t SdCardManager::remountReadWrite(sd::SdCard sdcard) {
+  std::ostringstream command;
+  if (sdcard == sd::SdCard::SLOT_0) {
+    command << "mount -o remount,rw " << SD_0_DEV_NAME << " " << SD_0_MOUNT_POINT;
+  } else {
+    command << "mount -o remount,rw " << SD_1_DEV_NAME << " " << SD_1_MOUNT_POINT;
+  }
+  ReturnValue_t result = cmdExecutor.load(command.str(), true, false);
+  if (result != HasReturnvaluesIF::RETURN_OK) {
+    return result;
+  }
+  return cmdExecutor.execute();
+}
+
+ReturnValue_t SdCardManager::performFsck(sd::SdCard sdcard, bool printOutput, int& linuxError) {
+  std::ostringstream command;
+  if (sdcard == sd::SdCard::SLOT_0) {
+    command << "fsck -y " << SD_0_DEV_NAME;
+  } else {
+    command << "fsck -y " << SD_1_DEV_NAME;
+  }
+  ReturnValue_t result = cmdExecutor.load(command.str(), true, printOutput);
+  if (result != HasReturnvaluesIF::RETURN_OK) {
+    return result;
+  }
+  result = cmdExecutor.execute();
+  if (result != HasReturnvaluesIF::RETURN_OK) {
+    linuxError = cmdExecutor.getLastError();
+  }
+  return result;
+}
+
+void SdCardManager::setActiveSdCard(sd::SdCard sdCard) { sdInfo.active = sdCard; }
+
+sd::SdCard SdCardManager::getActiveSdCard() const { return sdInfo.active; }

bsp_q7s/memory/SdCardManager.h

@@ -24,7 +24,7 @@ class MutexIF;
  * @brief   Manages handling of SD cards like switching them on or off or getting the current
  *          state
  */
-class SdCardManager : public SystemObject, public SdCardMountedIF {
+class SdCardManager : public SystemObject, public HasReturnvaluesIF, public SdCardMountedIF {
   friend class SdCardAccess;
 
  public:
@@ -36,6 +36,12 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
 
   using SdStatePair = std::pair<sd::SdState, sd::SdState>;
 
+  struct SdInfo {
+    sd::SdCard pref = sd::SdCard::NONE;
+    sd::SdCard other = sd::SdCard::NONE;
+    sd::SdCard active = sd::SdCard::NONE;
+  } sdInfo;
+
   static constexpr uint8_t INTERFACE_ID = CLASS_ID::SD_CARD_MANAGER;
 
   static constexpr ReturnValue_t OP_ONGOING = HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 0);
@@ -91,7 +97,7 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
    * @param sdCard
    * @return
    */
-  ReturnValue_t getPreferredSdCard(sd::SdCard& sdCard) const override;
+  sd::SdCard getPreferredSdCard() const override;
 
   /**
    * Switch on the specified SD card.
@@ -138,7 +144,7 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
    *           should call #updateSdCardStateFile again in that case
    *         - STATUS_FILE_NEXISTS if the status file does not exist
    */
-  ReturnValue_t getSdCardActiveStatus(SdStatePair& active);
+  ReturnValue_t getSdCardsStatus(SdStatePair& active);
 
   /**
    * Mount the specified SD card. This is necessary to use it.
@@ -146,6 +152,20 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
    * @return
    */
   ReturnValue_t mountSdCard(sd::SdCard sdCard);
+
+  /**
+   * Set the currently active SD card. This does not necessarily mean that the SD card is on or
+   * mounted
+   * @param sdCard
+   */
+  void setActiveSdCard(sd::SdCard sdCard) override;
+  /**
+   * Get the currently active SD card. This does not necessarily mean that the SD card is on or
+   * mounted
+   * @return
+   */
+  sd::SdCard getActiveSdCard() const override;
+
   /**
    * Unmount the specified SD card. This is recommended before switching it off. The SD card
    * can't be used after it has been unmounted.
@@ -173,7 +193,7 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
    * @param prefSdCardPtr
    * @return
    */
-  std::string getCurrentMountPrefix(sd::SdCard prefSdCardPtr = sd::SdCard::NONE) override;
+  std::string getCurrentMountPrefix() const override;
 
   OpStatus checkCurrentOp(Operations& currentOp);
 
@@ -194,6 +214,12 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
    */
   bool isSdCardMounted(sd::SdCard sdCard) override;
 
+  ReturnValue_t isSdCardMountedReadOnly(sd::SdCard sdcard, bool& readOnly);
+
+  ReturnValue_t remountReadWrite(sd::SdCard sdcard);
+
+  ReturnValue_t performFsck(sd::SdCard sdcard, bool printOutput, int& linuxError);
+
  private:
   CommandExecutor cmdExecutor;
   Operations currentOp = Operations::IDLE;
@@ -210,7 +236,7 @@ class SdCardManager : public SystemObject, public SdCardMountedIF {
 
   std::string currentPrefix;
 
-  static SdCardManager* factoryInstance;
+  static SdCardManager* INSTANCE;
 };
 
 #endif /* BSP_Q7S_MEMORY_SDCARDACCESSMANAGER_H_ */

mission/devices/PayloadPcduHandler.cpp

@@ -490,10 +490,9 @@ void PayloadPcduHandler::checkAdcValues() {
 
 void PayloadPcduHandler::checkJsonFileInit() {
   if (not jsonFileInitComplete) {
-    sd::SdCard prefSd;
+    sd::SdCard activeSd = sdcMan->getActiveSdCard();
-    sdcMan->getPreferredSdCard(prefSd);
+    if (sdcMan->isSdCardMounted(activeSd)) {
-    if (sdcMan->isSdCardMounted(prefSd)) {
+      params.initialize(sdcMan->getCurrentMountPrefix());
-      params.initialize(sdcMan->getCurrentMountPrefix(prefSd));
       jsonFileInitComplete = true;
     }
   }

mission/memory/SdCardMountedIF.h

@@ -8,9 +8,11 @@
 class SdCardMountedIF {
  public:
   virtual ~SdCardMountedIF(){};
-  virtual std::string getCurrentMountPrefix(sd::SdCard prefSdCardPtr = sd::SdCard::NONE) = 0;
+  virtual std::string getCurrentMountPrefix() const = 0;
   virtual bool isSdCardMounted(sd::SdCard sdCard) = 0;
-  virtual ReturnValue_t getPreferredSdCard(sd::SdCard& sdCard) const = 0;
+  virtual sd::SdCard getPreferredSdCard() const = 0;
+  virtual void setActiveSdCard(sd::SdCard sdCard) = 0;
+  virtual sd::SdCard getActiveSdCard() const = 0;
 
  private:
 };