nfs4.0: Refetch lease_time after clientid update

RFC 7530 requires us to refetch the lease time attribute once a new
clientID is established. This is already implemented for the
nfs4.1(+) clients by nfs41_init_clientid, which calls
nfs41_finish_session_reset, which calls nfs4_setup_state_renewal.

To make nfs4_setup_state_renewal available for nfs4.0, move it
further to the top of the source file to include it regardles of
CONFIG_NFS_V4_1 and to save a forward declaration.

Call nfs4_setup_state_renewal from nfs4_init_clientid.
Signed-off-by: Donald Buczek <buczek@molgen.mpg.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/nfs4state.c

@@ -87,6 +87,27 @@ const nfs4_stateid current_stateid = {
 
 static DEFINE_MUTEX(nfs_clid_init_mutex);
 
+static int nfs4_setup_state_renewal(struct nfs_client *clp)
+{
+	int status;
+	struct nfs_fsinfo fsinfo;
+	unsigned long now;
+
+	if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) {
+		nfs4_schedule_state_renewal(clp);
+		return 0;
+	}
+
+	now = jiffies;
+	status = nfs4_proc_get_lease_time(clp, &fsinfo);
+	if (status == 0) {
+		nfs4_set_lease_period(clp, fsinfo.lease_time * HZ, now);
+		nfs4_schedule_state_renewal(clp);
+	}
+
+	return status;
+}
+
 int nfs4_init_clientid(struct nfs_client *clp, const struct cred *cred)
 {
 	struct nfs4_setclientid_res clid = {
@@ -114,7 +135,7 @@ int nfs4_init_clientid(struct nfs_client *clp, const struct cred *cred)
 	if (status != 0)
 		goto out;
 	clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
-	nfs4_schedule_state_renewal(clp);
+	nfs4_setup_state_renewal(clp);
 out:
 	return status;
 }
@@ -286,27 +307,6 @@ static int nfs4_begin_drain_session(struct nfs_client *clp)
 
 #if defined(CONFIG_NFS_V4_1)
 
-static int nfs4_setup_state_renewal(struct nfs_client *clp)
-{
-	int status;
-	struct nfs_fsinfo fsinfo;
-	unsigned long now;
-
-	if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) {
-		nfs4_schedule_state_renewal(clp);
-		return 0;
-	}
-
-	now = jiffies;
-	status = nfs4_proc_get_lease_time(clp, &fsinfo);
-	if (status == 0) {
-		nfs4_set_lease_period(clp, fsinfo.lease_time * HZ, now);
-		nfs4_schedule_state_renewal(clp);
-	}
-
-	return status;
-}
-
 static void nfs41_finish_session_reset(struct nfs_client *clp)
 {
 	clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);