From 460f5cac1e24e947509b6112c99c5bc9ff687b45 Mon Sep 17 00:00:00 2001
From: Olaf Kirch <okir@suse.de>
Date: Wed, 4 Oct 2006 02:16:03 -0700
Subject: [PATCH] knfsd: export nsm_local_state to user space via sysctl

Every NLM call includes the client's NSM state.  Currently, the Linux client
always reports 0 - which seems not to cause any problems, but is not what the
protocol says.

This patch exposes the kernel's internal variable to user space via a sysctl,
which can be set at system boot time by statd.

Signed-off-by: Olaf Kirch <okir@suse.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 fs/lockd/mon.c | 2 +-
 fs/lockd/svc.c | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

(limited to 'fs')

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 709cf7c8054..e0179f8c327 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -24,7 +24,7 @@ static struct rpc_program	nsm_program;
 /*
  * Local NSM state
  */
-u32				nsm_local_state;
+int				nsm_local_state;
 
 /*
  * Common procedure for SM_MON/SM_UNMON calls
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index a3b7602cd38..634139232aa 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -33,6 +33,7 @@
 #include <linux/sunrpc/svcsock.h>
 #include <net/ip.h>
 #include <linux/lockd/lockd.h>
+#include <linux/lockd/sm_inter.h>
 #include <linux/nfs.h>
 
 #define NLMDBG_FACILITY		NLMDBG_SVC
@@ -404,6 +405,14 @@ static ctl_table nlm_sysctls[] = {
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec,
 	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "nsm_local_state",
+		.data		= &nsm_local_state,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec,
+	},
 	{ .ctl_name = 0 }
 };
 
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