Merge tag 'nfsd-4.9-2' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfix from Bruce Fields:
"Just one fix for an NFS/RDMA crash"

* tag 'nfsd-4.9-2' of git://linux-nfs.org/~bfields/linux:
sunrpc: svc_age_temp_xprts_now should not call setsockopt non-tcp transports

include/linux/sunrpc/svc_xprt.h

···
 	void		(*xpo_detach)(struct svc_xprt *);
 	void		(*xpo_free)(struct svc_xprt *);
 	int		(*xpo_secure_port)(struct svc_rqst *);
+	void		(*xpo_kill_temp_xprt)(struct svc_xprt *);
 };
 
 struct svc_xprt_class {

net/sunrpc/svc_xprt.c

···
 void svc_age_temp_xprts_now(struct svc_serv *serv, struct sockaddr *server_addr)
 {
 	struct svc_xprt *xprt;
-	struct svc_sock *svsk;
-	struct socket *sock;
 	struct list_head *le, *next;
 	LIST_HEAD(to_be_closed);
-	struct linger no_linger = {
-		.l_onoff = 1,
-		.l_linger = 0,
-	};
 
 	spin_lock_bh(&serv->sv_lock);
 	list_for_each_safe(le, next, &serv->sv_tempsocks) {
···
 		list_del_init(le);
 		xprt = list_entry(le, struct svc_xprt, xpt_list);
 		dprintk("svc_age_temp_xprts_now: closing %p\n", xprt);
-		svsk = container_of(xprt, struct svc_sock, sk_xprt);
-		sock = svsk->sk_sock;
-		kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER,
-				  (char *)&no_linger, sizeof(no_linger));
+		xprt->xpt_ops->xpo_kill_temp_xprt(xprt);
 		svc_close_xprt(xprt);
 	}
 }

net/sunrpc/svcsock.c

···
 	return !test_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
 }
 
+static void svc_tcp_kill_temp_xprt(struct svc_xprt *xprt)
+{
+	struct svc_sock *svsk;
+	struct socket *sock;
+	struct linger no_linger = {
+		.l_onoff = 1,
+		.l_linger = 0,
+	};
+
+	svsk = container_of(xprt, struct svc_sock, sk_xprt);
+	sock = svsk->sk_sock;
+	kernel_setsockopt(sock, SOL_SOCKET, SO_LINGER,
+			  (char *)&no_linger, sizeof(no_linger));
+}
+
 /*
  * See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo
  */
···
 	return NULL;
 }
 
+static void svc_udp_kill_temp_xprt(struct svc_xprt *xprt)
+{
+}
+
 static struct svc_xprt *svc_udp_create(struct svc_serv *serv,
 				       struct net *net,
 				       struct sockaddr *sa, int salen,
···
 	.xpo_has_wspace = svc_udp_has_wspace,
 	.xpo_accept = svc_udp_accept,
 	.xpo_secure_port = svc_sock_secure_port,
+	.xpo_kill_temp_xprt = svc_udp_kill_temp_xprt,
 };
 
 static struct svc_xprt_class svc_udp_class = {
···
 	.xpo_has_wspace = svc_tcp_has_wspace,
 	.xpo_accept = svc_tcp_accept,
 	.xpo_secure_port = svc_sock_secure_port,
+	.xpo_kill_temp_xprt = svc_tcp_kill_temp_xprt,
 };
 
 static struct svc_xprt_class svc_tcp_class = {

net/sunrpc/xprtrdma/svc_rdma_transport.c

···
 static void svc_rdma_free(struct svc_xprt *xprt);
 static int svc_rdma_has_wspace(struct svc_xprt *xprt);
 static int svc_rdma_secure_port(struct svc_rqst *);
+static void svc_rdma_kill_temp_xprt(struct svc_xprt *);
 
 static struct svc_xprt_ops svc_rdma_ops = {
 	.xpo_create = svc_rdma_create,
···
 	.xpo_has_wspace = svc_rdma_has_wspace,
 	.xpo_accept = svc_rdma_accept,
 	.xpo_secure_port = svc_rdma_secure_port,
+	.xpo_kill_temp_xprt = svc_rdma_kill_temp_xprt,
 };
 
 struct svc_xprt_class svc_rdma_class = {
···
 static int svc_rdma_secure_port(struct svc_rqst *rqstp)
 {
 	return 1;
+}
+
+static void svc_rdma_kill_temp_xprt(struct svc_xprt *xprt)
+{
 }
 
 int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr)