Custom login form and site lock down

gistfile1.txt

<?php 

// ----------------------------------------------------------------------------------------
// Redirect all non-logged-in users to the login page (private site). Add to functions.php. 
// ----------------------------------------------------------------------------------------
 
  function admin_redirect() {
	if ( !is_user_logged_in()) {
	wp_redirect( home_url('/wp-login.php/') );
	exit;
	}
	}
	 
	add_action('get_header', 'admin_redirect');

// ------------------------------------------------
// Custom login for theme and change logo url link
// ------------------------------------------------
 
	function childtheme_custom_login() {
		echo '<link rel="stylesheet" type="text/css" href="' . get_bloginfo('stylesheet_directory') . '/customlogin.css" />'; 
		echo '<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>';
		?>
			<script type="text/javascript">$(document).ready(function(){
				//$('#login').css("display","none");
				$('#login').hide();
				$('#login').delay(500).fadeIn(700);
			});</script>

		<?php }	 

	add_action('login_head', 'childtheme_custom_login');


	function loginpage_custom_link() {
		$sitedomain = get_bloginfo('url');
		return $sitedomain;
	}
	add_filter('login_headerurl','loginpage_custom_link');