From a4c14149f241e03e19ce9900f7ad5383e40fc2b4 Mon Sep 17 00:00:00 2001
From: Brendan O'Dea <bod@optus.net>
Date: Mon, 12 Jul 2004 08:21:45 +0000
Subject: [PATCH 1/1] add lock_pages option

---
 l2tpns.c | 18 ++++++++++++++----
 l2tpns.h |  8 ++++----
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/l2tpns.c b/l2tpns.c
index b305d9d..9d1454d 100644
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,7 +4,7 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.13 2004-07-11 07:57:35 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.14 2004-07-12 08:21:45 bodea Exp $";
 
 #include <arpa/inet.h>
 #include <assert.h>
@@ -111,6 +111,7 @@ struct config_descriptt config_values[] = {
 	CONFIG("cleanup_interval", cleanup_interval, INT),
 	CONFIG("multi_read_count", multi_read_count, INT),
 	CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
+	CONFIG("lock_pages", lock_pages, BOOL),
 	CONFIG("icmp_rate", icmp_rate, INT),
 	CONFIG("cluster_address", cluster_address, IP),
 	CONFIG("cluster_interface", cluster_interface, STRING),
@@ -143,10 +144,10 @@ char *plugin_functions[] = {
 
 #define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
 
-tunnelt *tunnel = NULL;		// Array of tunnel structures.
-sessiont *session = NULL;	// Array of session structures.
+tunnelt *tunnel = NULL;			// Array of tunnel structures.
+sessiont *session = NULL;		// Array of session structures.
 sessioncountt *sess_count = NULL;	// Array of partial per-session traffic counters.
-radiust *radius = NULL;		// Array of radius structures.
+radiust *radius = NULL;			// Array of radius structures.
 ippoolt *ip_address_pool = NULL;	// Array of dynamic IP addresses.
 controlt *controlfree = 0;
 struct Tstats *_statistics = NULL;
@@ -2955,6 +2956,15 @@ int main(int argc, char *argv[])
 	signal(SIGQUIT, sigquit_handler);
 	signal(SIGCHLD, sigchild_handler);
 
+	// Prevent us from getting paged out
+	if (config->lock_pages)
+	{
+		if (!mlockall(MCL_CURRENT))
+			log(1, 0, 0, 0, "Locking pages into memory\n");
+		else
+			log(0, 0, 0, 0, "Can't lock pages: %s\n", strerror(errno));
+	}
+
 	alarm(1);
 
 	// Drop privileges here
diff --git a/l2tpns.h b/l2tpns.h
index ce36a3c..56cb9a5 100644
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.11 2004-07-08 16:54:35 bodea Exp $
+// $Id: l2tpns.h,v 1.12 2004-07-12 08:21:45 bodea Exp $
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
@@ -413,9 +413,9 @@ struct configt
 	char		old_plugins[64][MAXPLUGINS];
 
 	int		next_tbf;			// Next HTB id available to use
-	int		scheduler_fifo;			// If 1, will force scheduler to use SCHED_FIFO.
-							// Don't use this unless you have a dual processor machine!
-	int		icmp_rate;			// Max number of ICMP unreachable per second to send
+	int		scheduler_fifo;			// If the system has multiple CPUs, use FIFO scheduling policy for this process.
+	int		lock_pages;			// Lock pages into memory.
+	int		icmp_rate;			// Max number of ICMP unreachable per second to send>
 
 	u32		cluster_address;		// Multicast address of cluster.
 							// Send to this address to have everyone hear.
-- 
2.20.1