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Subject[PATCH 017 of 19] knfsd: Export nsm_local_state to user space via sysctl

From: Olaf Kirch <okir@suse.de>

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>

### Diffstat output
./fs/lockd/mon.c | 2 +-
./fs/lockd/svc.c | 9 +++++++++
./include/linux/lockd/sm_inter.h | 2 +-
3 files changed, 11 insertions(+), 2 deletions(-)
diff .prev/fs/lockd/mon.c ./fs/lockd/mon.c
--- .prev/fs/lockd/mon.c 2006-09-01 12:11:16.000000000 +1000
+++ ./fs/lockd/mon.c 2006-09-01 12:17:47.000000000 +1000
@@ -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 .prev/fs/lockd/svc.c ./fs/lockd/svc.c
--- .prev/fs/lockd/svc.c 2006-09-01 12:15:24.000000000 +1000
+++ ./fs/lockd/svc.c 2006-09-01 12:19:26.000000000 +1000
@@ -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 }
};

diff .prev/include/linux/lockd/sm_inter.h ./include/linux/lockd/sm_inter.h
--- .prev/include/linux/lockd/sm_inter.h 2006-09-01 12:11:16.000000000 +1000
+++ ./include/linux/lockd/sm_inter.h 2006-09-01 12:17:47.000000000 +1000
@@ -42,6 +42,6 @@ struct nsm_res {

int nsm_monitor(struct nlm_host *);
int nsm_unmonitor(struct nlm_host *);
-extern u32 nsm_local_state;
+extern int nsm_local_state;

#endif /* LINUX_LOCKD_SM_INTER_H */
-
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