+ return -EACCES;
+ }
+ return 0;
+}
+
+/**
+ * udevdb_open_ro: open database for reading
+ */
+int udevdb_open_ro(void)
+{
+ udevdb = tdb_open(udev_db_filename, 0, 0, O_RDONLY, 0);
+ if (udevdb == NULL) {
+ dbg("unable to open database at '%s'", udev_db_filename);
+ return -EACCES;
+ }
+ return 0;
+}
+
+void (*user_record_callback) (char *path, struct udevice *dev);
+
+static int traverse_callback(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
+{
+ user_record_callback((char*) key.dptr, (struct udevice*) dbuf.dptr);
+ return 0;
+}
+
+/**
+ * udevdb_dump: dumps whole database by passing record data to user function
+ * @user_record_handler: user function called for every record in the database
+ */
+int udevdb_dump(void (*user_record_handler) (char *path, struct udevice *dev))
+{
+ if (user_record_handler == NULL) {
+ dbg("invalid user record handling function");