--- linux-2.4.21/fs/lockd/svc.c.orig	2003-08-21 22:01:41.000000000 -0400
+++ linux-2.4.21/fs/lockd/svc.c	2003-08-22 10:34:57.000000000 -0400
@@ -16,6 +16,7 @@
 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/sysctl.h>
 
 #include <linux/sched.h>
 #include <linux/errno.h>
@@ -51,19 +52,30 @@ static DECLARE_MUTEX_LOCKED(lockd_start)
 static DECLARE_WAIT_QUEUE_HEAD(lockd_exit);
 
 /*
- * Currently the following can be set only at insmod time.
- * Ideally, they would be accessible through the sysctl interface.
+ * These can be set at insmod time (useful for NFS as root filesystem),
+ * and also changed through the sysctl interface.  -- Jamie Lokier, Aug 2003
  */
-unsigned long			nlm_grace_period;
-unsigned long			nlm_timeout = LOCKD_DFLT_TIMEO;
-unsigned long			nlm_udpport, nlm_tcpport;
+static unsigned long		nlm_grace_period;
+static unsigned long		nlm_timeout = LOCKD_DFLT_TIMEO;
+static int			nlm_udpport, nlm_tcpport;
+
+/*
+ * Constants needed for the sysctl interface.
+ */
+static const unsigned long	nlm_grace_period_min = 0;
+static const unsigned long	nlm_grace_period_max = 240;
+static const unsigned long	nlm_timeout_min = 3;
+static const unsigned long	nlm_timeout_max = 20;
+static const int		nlm_port_min = 0, nlm_port_max = 65535;
+
+static struct ctl_table_header * nlm_sysctl_table;
 
 static unsigned long set_grace_period(void)
 {
 	unsigned long grace_period;
 
 	/* Note: nlm_timeout should always be nonzero */
-	if (nlm_grace_period)
+	if (nlm_grace_period && nlm_timeout > 0)
 		grace_period = ((nlm_grace_period + nlm_timeout - 1)
 				/ nlm_timeout) * nlm_timeout * HZ;
 	else
@@ -314,8 +326,76 @@ out:
 	up(&nlmsvc_sema);
 }
 
-#ifdef MODULE
-/* New module support in 2.1.18 */
+/*
+ * Sysctl parameters (same as module parameters, different interface).
+ */
+
+/* Something that isn't CTL_ANY, CTL_NONE or a value that may clash. */
+#define CTL_UNNUMBERED		-2
+
+static ctl_table nlm_sysctls[] = {
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nlm_grace_period",
+		.data		= &nlm_grace_period,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_doulongvec_minmax,
+		.extra1		= (unsigned long *) &nlm_grace_period_min,
+		.extra2		= (unsigned long *) &nlm_grace_period_max,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nlm_timeout",
+		.data		= &nlm_timeout,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_doulongvec_minmax,
+		.extra1		= (unsigned long *) &nlm_timeout_min,
+		.extra2		= (unsigned long *) &nlm_timeout_max,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nlm_udpport",
+		.data		= &nlm_udpport,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_minmax,
+		.extra1		= (int *) &nlm_port_min,
+		.extra2		= (int *) &nlm_port_max,
+	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nlm_tcpport",
+		.data		= &nlm_tcpport,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_minmax,
+		.extra1		= (int *) &nlm_port_min,
+		.extra2		= (int *) &nlm_port_max,
+	},
+	{ .ctl_name = 0 }
+};
+
+static ctl_table nlm_sysctl_dir[] = {
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nfs",
+		.mode		= 0555,
+		.child		= nlm_sysctls,
+	},
+	{ .ctl_name = 0 }
+};
+
+static ctl_table nlm_sysctl_root[] = {
+	{
+		.ctl_name	= CTL_FS,
+		.procname	= "fs",
+		.mode		= 0555,
+		.child		= nlm_sysctl_dir,
+	},
+	{ .ctl_name = 0 }
+};
 
 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
 MODULE_DESCRIPTION("NFS file locking service version " LOCKD_VERSION ".");
@@ -325,41 +405,26 @@ MODULE_PARM(nlm_timeout, "3-20l");
 MODULE_PARM(nlm_udpport, "0-65535l");
 MODULE_PARM(nlm_tcpport, "0-65535l");
 
-int
-init_module(void)
-{
-	/* Init the static variables */
-	init_MUTEX(&nlmsvc_sema);
-	nlmsvc_users = 0;
-	nlmsvc_pid = 0;
-	return 0;
-}
 
-void
-cleanup_module(void)
-{
-	/* FIXME: delete all NLM clients */
-	nlm_shutdown_hosts();
-}
-#else
-/* not a module, so process bootargs
- * lockd.udpport and lockd.tcpport
+/*
+ * Initialising and terminating the module.
  */
 
-static int __init udpport_set(char *str)
+static int __init init_nlm(void)
 {
-	nlm_udpport = simple_strtoul(str, NULL, 0);
-	return 1;
+	nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root, 0);
+	return nlm_sysctl_table ? 0 : -ENOMEM;
 }
-static int __init tcpport_set(char *str)
+
+static void __exit exit_nlm(void)
 {
-	nlm_tcpport = simple_strtoul(str, NULL, 0);
-	return 1;
+	/* FIXME: delete all NLM clients */
+	nlm_shutdown_hosts();
+	unregister_sysctl_table(nlm_sysctl_table);
 }
-__setup("lockd.udpport=", udpport_set);
-__setup("lockd.tcpport=", tcpport_set);
 
-#endif
+module_init(init_nlm);
+module_exit(exit_nlm);
 
 /*
  * Define NLM program and procedures