diff --git a/libfstools/extroot.c b/libfstools/extroot.c
index 418df94..d7590eb 100644
--- a/libfstools/extroot.c
+++ b/libfstools/extroot.c
@@ -22,6 +22,7 @@
 #include <libgen.h>
 
 #include "libfstools.h"
+#include "volume.h"
 
 char const *extroot_prefix = NULL;
 
@@ -104,7 +105,7 @@ int mount_extroot(void)
 				if (mount_move("/tmp/extroot", "", "/overlay")) {
 					ULOG_ERR("moving extroot failed - continue normal boot\n");
 					umount("/tmp/extroot/overlay");
-				} else if (fopivot("/overlay", "/rom")) {
+				} else if (fopivot_multi("/overlay", "/rom")) {
 					ULOG_ERR("switching to extroot failed - continue normal boot\n");
 					umount("/overlay");
 				} else {
@@ -119,3 +120,73 @@ int mount_extroot(void)
 	}
 	return -1;
 }
+
+static int mount_internal_overlay()
+{
+	struct volume *v = volume_find("rootfs_data");
+	char *mp;
+	char *fstype;
+
+	if (!v)
+		return -1;
+
+	volume_init(v);
+	mp = find_mount_point(v->blk, 0);
+	if (mp) {
+		ULOG_ERR("rootfs_data:%s is already mounted as %s\n", v->blk, mp);
+		return -1;
+	}
+
+	switch (volume_identify(v)) {
+		case FS_EXT4:
+			fstype = "ext4";
+			break;
+		case FS_F2FS:
+			fstype = "f2fs";
+			break;
+		case FS_UBIFS:
+			fstype = "ubifs";
+			break;
+		case FS_JFFS2:
+		default:
+			fstype = "jffs2";
+			break;
+	}
+
+	if (mkdir("/tmp/overlay", 0755)) {
+		ULOG_ERR("failed to mkdir /tmp/overlay: %m\n");
+		return -1;
+	}
+
+	if (mount(v->blk, "/tmp/overlay", fstype, MS_NOATIME | MS_RDONLY, NULL)) {
+		ULOG_ERR("failed to mount -t %s %s /tmp/overlay: %m\n", fstype, v->blk);
+		return -1;
+	}
+
+	return 0;
+}
+
+int fopivot_multi(char *rw_root, char *ro_root)
+{
+	if (mount_internal_overlay()) {
+		ULOG_ERR("mounting /tmp/overlay failed\n");
+		return -1;
+	}
+
+	if (mkdir("/overlay/internal", 0755)) {
+		ULOG_ERR("failed to mkdir /overlay/internal: %m\n");
+		return -1;
+	} 
+	
+	if (mount_move("/tmp/overlay", "/overlay/internal", "")) {
+		umount("/tmp/overlay");
+		return -1;
+	}
+	
+	if (fopivot(rw_root, ro_root, "/overlay/internal/upper")) {
+		umount("/overlay/internal");
+		return -1;
+	}
+	
+	return 0;
+}
\ No newline at end of file
diff --git a/libfstools/libfstools.h b/libfstools/libfstools.h
index f27307a..8554f4c 100644
--- a/libfstools/libfstools.h
+++ b/libfstools/libfstools.h
@@ -45,7 +45,8 @@ extern int mount_overlay(struct volume *v);
 
 extern int mount_move(const char *oldroot, const char *newroot, const char *dir);
 extern int pivot(char *new, char *old);
-extern int fopivot(char *rw_root, char *ro_root);
+extern int fopivot(char *rw_root, char *ro_lowerlevel0, char *ro_lowerlevel1);
+extern int fopivot_multi(char *rw_root, char *ro_root);
 extern int ramoverlay(void);
 
 extern int find_overlay_mount(char *overlay);
diff --git a/libfstools/mount.c b/libfstools/mount.c
index c7f2789..619ac20 100644
--- a/libfstools/mount.c
+++ b/libfstools/mount.c
@@ -89,12 +89,13 @@ pivot(char *new, char *old)
  * fopivot - switch to overlay using passed dir as upper one
  *
  * @rw_root: writable directory that will be used as upper dir
- * @ro_root: directory where old root will be put
+ * @ro_root: directory where old root will be put 
+ * @ro_lowerlevel1: directory where internal overlay will be put
  */
 int
-fopivot(char *rw_root, char *ro_root)
+fopivot(char *rw_root, char *ro_root, char *ro_lowerlevel1)
 {
-	char overlay[64], mount_options[64];
+	char overlay[64], mount_options[128];
 
 	if (find_filesystem("overlay")) {
 		ULOG_ERR("BUG: no suitable fs found\n");
@@ -110,15 +111,21 @@ fopivot(char *rw_root, char *ro_root)
 	 */
 	snprintf(mount_options, sizeof(mount_options), "lowerdir=/,upperdir=%s", rw_root);
 	if (mount(overlay, "/mnt", "overlayfs", MS_NOATIME, mount_options)) {
-		char upperdir[64], workdir[64], upgrade[64], upgrade_dest[64];
+		char upperdir[64], workdir[64], upgrade[64], upgrade_dest[64], lowerdir[64];
 		struct stat st;
 
 		snprintf(upperdir, sizeof(upperdir), "%s/upper", rw_root);
 		snprintf(workdir, sizeof(workdir), "%s/work", rw_root);
 		snprintf(upgrade, sizeof(upgrade), "%s/sysupgrade.tgz", rw_root);
 		snprintf(upgrade_dest, sizeof(upgrade_dest), "%s/sysupgrade.tgz", upperdir);
-		snprintf(mount_options, sizeof(mount_options), "lowerdir=/,upperdir=%s,workdir=%s",
-			 upperdir, workdir);
+
+		if (ro_lowerlevel1)
+			snprintf(lowerdir, sizeof(lowerdir), "%s:/", ro_lowerlevel1);
+		else
+			snprintf(lowerdir, sizeof(lowerdir), "/");
+
+		snprintf(mount_options, sizeof(mount_options), "lowerdir=%s,upperdir=%s,workdir=%s",
+			lowerdir, upperdir, workdir);
 
 		/*
 		 * Overlay FS v23 and later requires both a upper and
@@ -154,5 +161,5 @@ ramoverlay(void)
 	mkdir("/tmp/root", 0755);
 	mount("tmpfs", "/tmp/root", "tmpfs", MS_NOATIME, "mode=0755");
 
-	return fopivot("/tmp/root", "/rom");
+	return fopivot("/tmp/root", "/rom", NULL);
 }
diff --git a/libfstools/overlay.c b/libfstools/overlay.c
index 14214a3..1a019ed 100644
--- a/libfstools/overlay.c
+++ b/libfstools/overlay.c
@@ -205,7 +205,7 @@ switch2jffs(struct volume *v)
 		return -1;
 	}
 
-	ret = fopivot("/overlay", "/rom");
+	ret = fopivot("/overlay", "/rom", NULL);
 
 	/*
 	 * Besides copying overlay data from "tmpfs" to "jffs2" we should also
@@ -320,7 +320,7 @@ jffs2_switch(struct volume *v)
 	case FS_UBIFS:
 		if (overlay_mount(v, fs_name))
 			return -1;
-		if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom")) {
+		if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom", NULL)) {
 			ULOG_ERR("switching to %s failed\n", fs_name);
 			return -1;
 		}
@@ -439,7 +439,7 @@ int mount_overlay(struct volume *v)
 
 	fs_name = overlay_fs_name(volume_identify(v));
 	ULOG_INFO("switching to %s overlay\n", fs_name);
-	if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom")) {
+	if (mount_move("/tmp", "", "/overlay") || fopivot("/overlay", "/rom", NULL)) {
 		ULOG_ERR("switching to %s failed - fallback to ramoverlay\n", fs_name);
 		return ramoverlay();
 	}
diff --git a/libfstools/snapshot.c b/libfstools/snapshot.c
index 4870cf7..c22cdc0 100644
--- a/libfstools/snapshot.c
+++ b/libfstools/snapshot.c
@@ -320,7 +320,7 @@ static int
 _ramoverlay(char *rom, char *overlay)
 {
 	mount("tmpfs", overlay, "tmpfs", MS_NOATIME, "mode=0755");
-	return fopivot(overlay, rom);
+	return fopivot(overlay, rom, NULL);
 }
 
 int