SUNRPC: Remove svo_shutdown method

Clean up. Neil observed that "any code that calls svc_shutdown_net()
knows what the shutdown function should be, and so can call it
directly."
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: NeilBrown <neilb@suse.de>

fs/lockd/svc.c

@@ -249,6 +249,7 @@ static int make_socks(struct svc_serv *serv, struct net *net,
 		printk(KERN_WARNING
 			"lockd_up: makesock failed, error=%d\n", err);
 	svc_shutdown_net(serv, net);
+	svc_rpcb_cleanup(serv, net);
 	return err;
 }
 
@@ -287,8 +288,7 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net)
 			cancel_delayed_work_sync(&ln->grace_period_end);
 			locks_end_grace(&ln->lockd_manager);
 			svc_shutdown_net(serv, net);
-			dprintk("%s: per-net data destroyed; net=%x\n",
-				__func__, net->ns.inum);
+			svc_rpcb_cleanup(serv, net);
 		}
 	} else {
 		pr_err("%s: no users! net=%x\n",
@@ -351,7 +351,6 @@ static struct notifier_block lockd_inet6addr_notifier = {
 #endif
 
 static const struct svc_serv_ops lockd_sv_ops = {
-	.svo_shutdown		= svc_rpcb_cleanup,
 	.svo_function		= lockd,
 	.svo_module		= THIS_MODULE,
 };

fs/nfsd/nfssvc.c

@@ -613,7 +613,6 @@ static int nfsd_get_default_max_blksize(void)
 }
 
 static const struct svc_serv_ops nfsd_thread_sv_ops = {
-	.svo_shutdown		= nfsd_last_thread,
 	.svo_function		= nfsd,
 	.svo_module		= THIS_MODULE,
 };
@@ -724,6 +723,7 @@ void nfsd_put(struct net *net)
 
 	if (kref_put(&nn->nfsd_serv->sv_refcnt, nfsd_noop)) {
 		svc_shutdown_net(nn->nfsd_serv, net);
+		nfsd_last_thread(nn->nfsd_serv, net);
 		svc_destroy(&nn->nfsd_serv->sv_refcnt);
 		spin_lock(&nfsd_notifier_lock);
 		nn->nfsd_serv = NULL;

include/linux/sunrpc/svc.h

@@ -55,9 +55,6 @@ struct svc_pool {
 struct svc_serv;
 
 struct svc_serv_ops {
-	/* Callback to use when last thread exits. */
-	void		(*svo_shutdown)(struct svc_serv *, struct net *);
-
 	/* function for service threads to run */
 	int		(*svo_function)(void *);
 

net/sunrpc/svc.c

@@ -539,9 +539,6 @@ EXPORT_SYMBOL_GPL(svc_create_pooled);
 void svc_shutdown_net(struct svc_serv *serv, struct net *net)
 {
 	svc_close_net(serv, net);
-
-	if (serv->sv_ops->svo_shutdown)
-		serv->sv_ops->svo_shutdown(serv, net);
 }
 EXPORT_SYMBOL_GPL(svc_shutdown_net);