nfsd: only register cld pipe notifier when CONFIG_NFSD_V4 is enabled
Otherwise, we get a warning or error similar to this when building with
CONFIG_NFSD_V4 disabled:
ERROR: "nfsd4_cld_block" [fs/nfsd/nfsd.ko] undefined!
Fix this by wrapping the calls to rpc_pipefs_notifier_register and
..._unregister in another function and providing no-op replacements
when CONFIG_NFSD_V4 is disabled.
Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 66eac33..12e0cff 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -31,5 +31,4 @@
};
extern int nfsd_net_id;
-extern struct notifier_block nfsd4_cld_block;
#endif /* __NFSD_NETNS_H__ */
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index eaaf948..4767429 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -1032,3 +1032,15 @@
struct notifier_block nfsd4_cld_block = {
.notifier_call = rpc_pipefs_event,
};
+
+int
+register_cld_notifier(void)
+{
+ return rpc_pipefs_notifier_register(&nfsd4_cld_block);
+}
+
+void
+unregister_cld_notifier(void)
+{
+ rpc_pipefs_notifier_unregister(&nfsd4_cld_block);
+}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index dee6c1b..2c53be6 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1137,7 +1137,7 @@
int retval;
printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
- retval = rpc_pipefs_notifier_register(&nfsd4_cld_block);
+ retval = register_cld_notifier();
if (retval)
return retval;
retval = register_pernet_subsys(&nfsd_net_ops);
@@ -1186,7 +1186,7 @@
out_unregister_pernet:
unregister_pernet_subsys(&nfsd_net_ops);
out_unregister_notifier:
- rpc_pipefs_notifier_unregister(&nfsd4_cld_block);
+ unregister_cld_notifier();
return retval;
}
@@ -1203,7 +1203,7 @@
nfsd_fault_inject_cleanup();
unregister_filesystem(&nfsd_fs_type);
unregister_pernet_subsys(&nfsd_net_ops);
- rpc_pipefs_notifier_unregister(&nfsd4_cld_block);
+ unregister_cld_notifier();
}
MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 1d1e858..1671429 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -364,12 +364,17 @@
NFSD_WRITEABLE_ATTRS_WORD2
extern int nfsd4_is_junction(struct dentry *dentry);
-#else
+extern int register_cld_notifier(void);
+extern void unregister_cld_notifier(void);
+#else /* CONFIG_NFSD_V4 */
static inline int nfsd4_is_junction(struct dentry *dentry)
{
return 0;
}
+#define register_cld_notifier() 0
+#define unregister_cld_notifier() do { } while(0)
+
#endif /* CONFIG_NFSD_V4 */
#endif /* LINUX_NFSD_NFSD_H */