+int ext4fs_exists(const char *filename)
+{
+ loff_t file_len;
+ int ret;
+
+ ret = ext4fs_open(filename, &file_len);
+ return ret == 0;
+}
+
+int ext4fs_size(const char *filename, loff_t *size)
+{
+ return ext4fs_open(filename, size);
+}
+
+int ext4fs_read(char *buf, loff_t offset, loff_t len, loff_t *actread)