add file system name capability to Winfsp mounter

Author: infeo

src/main/java/org/cryptomator/frontend/fuse/mount/WinFspMountProvider.java

@@ -21,6 +21,7 @@
 import java.util.Set;
 import java.util.concurrent.TimeoutException;
 
+import static org.cryptomator.integrations.mount.MountCapability.FILE_SYSTEM_NAME;
 import static org.cryptomator.integrations.mount.MountCapability.MOUNT_AS_DRIVE_LETTER;
 import static org.cryptomator.integrations.mount.MountCapability.MOUNT_FLAGS;
 import static org.cryptomator.integrations.mount.MountCapability.MOUNT_TO_EXISTING_DIR;
@@ -47,7 +48,7 @@ public boolean isSupported() {
 
 	@Override
 	public Set<MountCapability> capabilities() {
-		return EnumSet.of(MOUNT_FLAGS, MOUNT_AS_DRIVE_LETTER, MOUNT_WITHIN_EXISTING_PARENT, UNMOUNT_FORCED, READ_ONLY, VOLUME_NAME);
+		return EnumSet.of(MOUNT_FLAGS, MOUNT_AS_DRIVE_LETTER, MOUNT_WITHIN_EXISTING_PARENT, UNMOUNT_FORCED, READ_ONLY, VOLUME_NAME, FILE_SYSTEM_NAME);
 	}
 
 	@Override
@@ -63,6 +64,8 @@ public MountBuilder forFileSystem(Path vfsRoot) {
 
 	protected static class WinFspMountBuilder extends AbstractMountBuilder {
 
+		private static String DEFAULT_FS_NAME = "FUSE-NIO-FS";
+		String fsName = DEFAULT_FS_NAME;
 		boolean isReadOnly = false;
 
 		WinFspMountBuilder(Path vfsRoot) {
@@ -80,6 +83,12 @@ public MountBuilder setMountpoint(Path mountPoint) {
 			}
 		}
 
+		@Override
+		public MountBuilder setFileSystemName(String fsName) {
+			this.fsName = fsName;
+			return this;
+		}
+
 		@Override
 		public MountBuilder setReadOnly(boolean mountReadOnly) {
 			isReadOnly = mountReadOnly;
@@ -98,6 +107,8 @@ protected Set<String> combinedMountFlags() {
 				combined.removeIf(flag -> flag.startsWith("-oumask="));
 				combined.add("-oumask=0333");
 			}
+			combined.removeIf(flag -> flag.startsWith("-oExactFileSystemName="));
+			combined.add("-oExactFileSystemName="+fsName);
 			return combined;
 		}