--- a/package/base-files/files/etc/init.d/boot	2022-11-09 17:47:35.670676000 +0800
+++ b/package/base-files/files/etc/init.d/boot	2022-11-09 17:17:45.379828000 +0800
@@ -51,7 +51,34 @@
 	/bin/config_generate
 	uci_apply_defaults
 	sync
+
+	result=`strings /sys/devices/virtual/ubi/ubi0/ubi0_*/name|grep backup`
+	[ -z $result ] && {
+        	ubimkvol /dev/ubi0 -s 2MiB -N backup
+	}
+
+	[ ! -d /mnt/backup ] && {
+		mkdir /mnt/backup
+ 	}

+	volume=""
+	for i in $(seq 0 5)
+	do
+   		name=`strings /sys/devices/virtual/ubi/ubi0/ubi0_$i/name`
+   		if [ $name == "backup" ]; then
+       			volume=ubi0_$i
+   		fi
+	done
+
+	[ $volume != "" ] && {
+		mount -t ubifs /dev/$volume /mnt/backup
+	}
+
 	# temporary hack until configd exists
 	/sbin/reload_config
+
+	[ -f /mnt/backup/config.tar.gz ] && {
+	    sysupgrade -r /mnt/backup/config.tar.gz
+	    rm /mnt/backup/config.tar.gz
+	}
 }