introduced FuseRestartRequiredException and UnlockFuseRestartRequired window

src/main/java/org/cryptomator/common/mount/FuseRestartRequiredException.java

@@ -0,0 +1,9 @@
+package org.cryptomator.common.mount;
+
+import org.cryptomator.integrations.mount.MountFailedException;
+
+public class FuseRestartRequiredException extends MountFailedException {
+	public FuseRestartRequiredException(String msg) {
+		super(msg);
+	}
+}

src/main/java/org/cryptomator/common/vaults/Vault.java

@@ -12,6 +12,7 @@ import org.apache.commons.lang3.SystemUtils;
 import org.cryptomator.common.Constants;
 import org.cryptomator.common.ObservableUtil;
 import org.cryptomator.common.mount.ActualMountService;
+import org.cryptomator.common.mount.FuseRestartRequiredException;
 import org.cryptomator.common.mount.Mounter;
 import org.cryptomator.common.mount.WindowsDriveLetters;
 import org.cryptomator.common.settings.VaultSettings;
@@ -163,7 +164,7 @@ public class Vault {
 						&& VaultModule.isProblematicFuseService(s) //
 						&& !firstUsedProblematicFuseMountService.get().equals(s)).getValue();
 		if(fuseRestartRequired){
-			throw new MountFailedException("fuseRestartRequired");
+			throw new FuseRestartRequiredException("fuseRestartRequired");
 		}
 
 		CryptoFileSystem fs = createCryptoFileSystem(keyLoader);

src/main/java/org/cryptomator/ui/common/FxmlFile.java

@@ -44,6 +44,7 @@ public enum FxmlFile {
 	REMOVE_VAULT("/fxml/remove_vault.fxml"), //
 	UPDATE_REMINDER("/fxml/update_reminder.fxml"), //
 	UNLOCK_ENTER_PASSWORD("/fxml/unlock_enter_password.fxml"),
+	UNLOCK_FUSE_RESTART_REQUIRED("/fxml/unlock_fuse_restart_required.fxml"), //
 	UNLOCK_INVALID_MOUNT_POINT("/fxml/unlock_invalid_mount_point.fxml"), //
 	UNLOCK_SELECT_MASTERKEYFILE("/fxml/unlock_select_masterkeyfile.fxml"), //
 	UNLOCK_SUCCESS("/fxml/unlock_success.fxml"), //

src/main/java/org/cryptomator/ui/unlock/UnlockFuseRestartRequiredController.java

@@ -0,0 +1,38 @@
+package org.cryptomator.ui.unlock;
+
+import org.cryptomator.common.vaults.Vault;
+import org.cryptomator.ui.common.FxController;
+import org.cryptomator.ui.fxapp.FxApplicationWindows;
+import org.cryptomator.ui.vaultoptions.SelectedVaultOptionsTab;
+
+import javax.inject.Inject;
+import javafx.fxml.FXML;
+import javafx.stage.Stage;
+
+@UnlockScoped
+public class UnlockFuseRestartRequiredController implements FxController {
+
+	private final Stage window;
+	private final FxApplicationWindows appWindows;
+	private final Vault vault;
+	@Inject
+	UnlockFuseRestartRequiredController(@UnlockWindow Stage window, //
+										FxApplicationWindows appWindows, //
+										@UnlockWindow Vault vault) {
+		this.window = window;
+		this.appWindows = appWindows;
+		this.vault = vault;
+	}
+
+	@FXML
+	public void close() {
+		window.close();
+	}
+
+	@FXML
+	public void closeAndOpenVaultOptions() {
+		appWindows.showVaultOptionsWindow(vault, SelectedVaultOptionsTab.MOUNT);
+		window.close();
+	}
+
+}

src/main/java/org/cryptomator/ui/unlock/UnlockModule.java

@@ -81,6 +81,13 @@ abstract class UnlockModule {
 		return fxmlLoaders.createScene(FxmlFile.UNLOCK_INVALID_MOUNT_POINT);
 	}
 
+	@Provides
+	@FxmlScene(FxmlFile.UNLOCK_FUSE_RESTART_REQUIRED)
+	@UnlockScoped
+	static Scene provideFuseRestartRequiredScene(@UnlockWindow FxmlLoaderFactory fxmlLoaders) {
+		return fxmlLoaders.createScene(FxmlFile.UNLOCK_FUSE_RESTART_REQUIRED);
+	}
+
 	// ------------------
 
 	@Binds
@@ -93,4 +100,9 @@ abstract class UnlockModule {
 	@FxControllerKey(UnlockInvalidMountPointController.class)
 	abstract FxController bindUnlockInvalidMountPointController(UnlockInvalidMountPointController controller);
 
+	@Binds
+	@IntoMap
+	@FxControllerKey(UnlockFuseRestartRequiredController.class)
+	abstract FxController bindUnlockFuseRestartRequiredController(UnlockFuseRestartRequiredController controller);
+
 }

src/main/java/org/cryptomator/ui/unlock/UnlockWorkflow.java

@@ -2,6 +2,7 @@ package org.cryptomator.ui.unlock;
 
 import com.google.common.base.Throwables;
 import dagger.Lazy;
+import org.cryptomator.common.mount.FuseRestartRequiredException;
 import org.cryptomator.common.mount.IllegalMountPointException;
 import org.cryptomator.common.vaults.Vault;
 import org.cryptomator.common.vaults.VaultState;
@@ -38,17 +39,27 @@ public class UnlockWorkflow extends Task<Boolean> {
 	private final VaultService vaultService;
 	private final Lazy<Scene> successScene;
 	private final Lazy<Scene> invalidMountPointScene;
+	private final Lazy<Scene> fuseRestartRequiredScene;
 	private final FxApplicationWindows appWindows;
 	private final KeyLoadingStrategy keyLoadingStrategy;
 	private final ObjectProperty<IllegalMountPointException> illegalMountPointException;
 
 	@Inject
-	UnlockWorkflow(@UnlockWindow Stage window, @UnlockWindow Vault vault, VaultService vaultService, @FxmlScene(FxmlFile.UNLOCK_SUCCESS) Lazy<Scene> successScene, @FxmlScene(FxmlFile.UNLOCK_INVALID_MOUNT_POINT) Lazy<Scene> invalidMountPointScene, FxApplicationWindows appWindows, @UnlockWindow KeyLoadingStrategy keyLoadingStrategy, @UnlockWindow ObjectProperty<IllegalMountPointException> illegalMountPointException) {
+	UnlockWorkflow(@UnlockWindow Stage window, //
+				   @UnlockWindow Vault vault, //
+				   VaultService vaultService, //
+				   @FxmlScene(FxmlFile.UNLOCK_SUCCESS) Lazy<Scene> successScene, //
+				   @FxmlScene(FxmlFile.UNLOCK_INVALID_MOUNT_POINT) Lazy<Scene> invalidMountPointScene, //
+				   @FxmlScene(FxmlFile.UNLOCK_FUSE_RESTART_REQUIRED) Lazy<Scene> fuseRestartRequiredScene, //
+				   FxApplicationWindows appWindows, //
+				   @UnlockWindow KeyLoadingStrategy keyLoadingStrategy, //
+				   @UnlockWindow ObjectProperty<IllegalMountPointException> illegalMountPointException) {
 		this.window = window;
 		this.vault = vault;
 		this.vaultService = vaultService;
 		this.successScene = successScene;
 		this.invalidMountPointScene = invalidMountPointScene;
+		this.fuseRestartRequiredScene = fuseRestartRequiredScene;
 		this.appWindows = appWindows;
 		this.keyLoadingStrategy = keyLoadingStrategy;
 		this.illegalMountPointException = illegalMountPointException;
@@ -85,6 +96,13 @@ public class UnlockWorkflow extends Task<Boolean> {
 		});
 	}
 
+	private void handleFuseRestartRequiredError(FuseRestartRequiredException frre) {
+		Platform.runLater(() -> {
+			window.setScene(fuseRestartRequiredScene.get());
+			window.show();
+		});
+	}
+
 	private void handleGenericError(Throwable e) {
 		LOG.error("Unlock failed for technical reasons.", e);
 		appWindows.showErrorWindow(e, window, null);
@@ -115,6 +133,9 @@ public class UnlockWorkflow extends Task<Boolean> {
 		Throwable throwable = super.getException();
 		if(throwable instanceof IllegalMountPointException impe) {
 			handleIllegalMountPointError(impe);
+		}
+		else if (throwable instanceof FuseRestartRequiredException fRRE) {
+			handleFuseRestartRequiredError(fRRE);
 		} else {
 			handleGenericError(throwable);
 		}

src/main/resources/fxml/unlock_fuse_restart_required.fxml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import org.cryptomator.ui.controls.FontAwesome5IconView?>
+<?import javafx.geometry.Insets?>
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.ButtonBar?>
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.Group?>
+<?import javafx.scene.layout.HBox?>
+<?import javafx.scene.layout.Region?>
+<?import javafx.scene.layout.StackPane?>
+<?import javafx.scene.layout.VBox?>
+<?import javafx.scene.shape.Circle?>
+<HBox xmlns:fx="http://javafx.com/fxml"
+	  xmlns="http://javafx.com/javafx"
+	  fx:controller="org.cryptomator.ui.unlock.UnlockFuseRestartRequiredController"
+	  minWidth="400"
+	  maxWidth="400"
+	  minHeight="145"
+	  spacing="12"
+	  alignment="TOP_LEFT">
+	<padding>
+		<Insets topRightBottomLeft="12"/>
+	</padding>
+	<children>
+		<Group>
+			<StackPane>
+				<padding>
+					<Insets topRightBottomLeft="6"/>
+				</padding>
+				<Circle styleClass="glyph-icon-red" radius="24"/>
+				<FontAwesome5IconView styleClass="glyph-icon-white" glyph="TIMES" glyphSize="24"/>
+			</StackPane>
+		</Group>
+		<VBox HBox.hgrow="ALWAYS">
+			<Label styleClass="label-large" text="%unlock.error.fuseRestartRequired.message" wrapText="true" textAlignment="LEFT">
+				<padding>
+					<Insets bottom="6" top="6"/>
+				</padding>
+			</Label>
+
+
+			<Region VBox.vgrow="ALWAYS" minHeight="18"/>
+			<ButtonBar buttonMinWidth="120" buttonOrder="+CI">
+				<buttons>
+					<Button text="%generic.button.cancel" ButtonBar.buttonData="CANCEL_CLOSE" cancelButton="true" onAction="#close"/>
+					<Button text="%main.vaultDetail.optionsBtn" ButtonBar.buttonData="FINISH" defaultButton="true" onAction="#closeAndOpenVaultOptions" />
+				</buttons>
+			</ButtonBar>
+		</VBox>
+	</children>
+</HBox>

src/main/resources/i18n/strings.properties

@@ -142,6 +142,7 @@ unlock.error.customPath.description.hideawayNotDir=The temporary, hidden file "%
 unlock.error.customPath.description.couldNotBeCleaned=Your vault could not be mounted to the path "%s". Please try again or choose a different path.
 unlock.error.customPath.description.notEmptyDir=The custom mount path "%s" is not an empty folder. Please choose an empty folder and try again.
 unlock.error.customPath.description.generic=You have selected a custom mount path for this vault, but using it failed with the message: %2$s
+unlock.error.fuseRestartRequired.message=Unable to mount selected vault volume type, restart required. 
 ## Hub
 hub.noKeychain.message=Unable to access device key
 hub.noKeychain.description=In order to unlock Hub vaults, a device key is required, which is secured using a keychain. To proceed, enable “%s” and select a keychain in the preferences.