NLM: LOCKD fails to load if CONFIG_SYSCTL is not set
Bruce Fields says:
"By the way, we've got another config-related nit here:
http://bugzilla.linux-nfs.org/show_bug.cgi?id=156
You can build lockd without CONFIG_SYSCTL set, but then the module will
fail to load."
For now, disable the sysctl registration calls in lockd if CONFIG_SYSCTL
is not enabled. This allows the kernel to build properly if PROC_FS or
SYSCTL is not enabled, but an NFS client is desired.
In the long run, we would like to be able to build the kernel with an
NFS client but without lockd. This makes sense, for example, if you want
an NFSv4-only NFS client, as NFSv4 doesn't use NLM at all.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 1ed8bd4..38c2f0b 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -74,7 +74,9 @@
static const unsigned long nlm_timeout_max = 20;
static const int nlm_port_min = 0, nlm_port_max = 65535;
+#ifdef CONFIG_SYSCTL
static struct ctl_table_header * nlm_sysctl_table;
+#endif
static unsigned long get_lockd_grace_period(void)
{
@@ -359,6 +361,8 @@
}
EXPORT_SYMBOL(lockd_down);
+#ifdef CONFIG_SYSCTL
+
/*
* Sysctl parameters (same as module parameters, different interface).
*/
@@ -443,6 +447,8 @@
{ .ctl_name = 0 }
};
+#endif /* CONFIG_SYSCTL */
+
/*
* Module (and sysfs) parameters.
*/
@@ -516,15 +522,21 @@
static int __init init_nlm(void)
{
+#ifdef CONFIG_SYSCTL
nlm_sysctl_table = register_sysctl_table(nlm_sysctl_root);
return nlm_sysctl_table ? 0 : -ENOMEM;
+#else
+ return 0;
+#endif
}
static void __exit exit_nlm(void)
{
/* FIXME: delete all NLM clients */
nlm_shutdown_hosts();
+#ifdef CONFIG_SYSCTL
unregister_sysctl_table(nlm_sysctl_table);
+#endif
}
module_init(init_nlm);