xprtrdma: Initialize the xprt address string array earlier

This makes the address strings available for debugging messages in
earlier stages of transport set up.

The first benefit is to get rid of the single-use rep_remote_addr
field, saving 128+ bytes in struct rpcrdma_ep.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

net/sunrpc/xprtrdma/transport.c

@@ -373,6 +373,7 @@ xprt_setup_rdma(struct xprt_create *args)
 
 	if (rpc_get_port(sap))
 		xprt_set_bound(xprt);
+	xprt_rdma_format_addresses(xprt, sap);
 
 	cdata.max_requests = xprt->max_reqs;
 
@@ -405,7 +406,6 @@ xprt_setup_rdma(struct xprt_create *args)
 	 */
 	new_xprt->rx_data = cdata;
 	new_ep = &new_xprt->rx_ep;
-	new_ep->rep_remote_addr = cdata.addr;
 
 	rc = rpcrdma_ep_create(&new_xprt->rx_ep,
 				&new_xprt->rx_ia, &new_xprt->rx_data);
@@ -419,7 +419,6 @@ xprt_setup_rdma(struct xprt_create *args)
 	INIT_DELAYED_WORK(&new_xprt->rx_connect_worker,
 			  xprt_rdma_connect_worker);
 
-	xprt_rdma_format_addresses(xprt, sap);
 	xprt->max_payload = new_xprt->rx_ia.ri_ops->ro_maxpages(new_xprt);
 	if (xprt->max_payload == 0)
 		goto out4;
@@ -437,13 +436,13 @@ xprt_setup_rdma(struct xprt_create *args)
 
 out4:
 	rpcrdma_buffer_destroy(&new_xprt->rx_buf);
-	xprt_rdma_free_addresses(xprt);
 	rc = -ENODEV;
 out3:
 	rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia);
 out2:
 	rpcrdma_ia_close(&new_xprt->rx_ia);
 out1:
+	xprt_rdma_free_addresses(xprt);
 	xprt_free(xprt);
 	return ERR_PTR(rc);
 }

net/sunrpc/xprtrdma/verbs.c

@@ -219,9 +219,6 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event)
 	struct rpcrdma_xprt *xprt = id->context;
 	struct rpcrdma_ia *ia = &xprt->rx_ia;
 	struct rpcrdma_ep *ep = &xprt->rx_ep;
-#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
-	struct sockaddr *sap = (struct sockaddr *)&ep->rep_remote_addr;
-#endif
 	int connstate = 0;
 
 	switch (event->event) {
@@ -244,9 +241,9 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event)
 		break;
 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
-		pr_info("rpcrdma: removing device %s for %pIS:%u\n",
+		pr_info("rpcrdma: removing device %s for %s:%s\n",
 			ia->ri_device->name,
-			sap, rpc_get_port(sap));
+			rpcrdma_addrstr(xprt), rpcrdma_portstr(xprt));
 #endif
 		set_bit(RPCRDMA_IAF_REMOVING, &ia->ri_flags);
 		ep->rep_connected = -ENODEV;
@@ -269,8 +266,8 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event)
 		connstate = -ENETDOWN;
 		goto connected;
 	case RDMA_CM_EVENT_REJECTED:
-		dprintk("rpcrdma: connection to %pIS:%u rejected: %s\n",
-			sap, rpc_get_port(sap),
+		dprintk("rpcrdma: connection to %s:%s rejected: %s\n",
+			rpcrdma_addrstr(xprt), rpcrdma_portstr(xprt),
 			rdma_reject_msg(id, event->status));
 		connstate = -ECONNREFUSED;
 		if (event->status == IB_CM_REJ_STALE_CONN)
@@ -285,8 +282,9 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event)
 		wake_up_all(&ep->rep_connect_wait);
 		/*FALLTHROUGH*/
 	default:
-		dprintk("RPC:       %s: %pIS:%u on %s/%s (ep 0x%p): %s\n",
-			__func__, sap, rpc_get_port(sap),
+		dprintk("RPC:       %s: %s:%s on %s/%s (ep 0x%p): %s\n",
+			__func__,
+			rpcrdma_addrstr(xprt), rpcrdma_portstr(xprt),
 			ia->ri_device->name, ia->ri_ops->ro_displayname,
 			ep, rdma_event_msg(event->event));
 		break;

net/sunrpc/xprtrdma/xprt_rdma.h

@@ -100,7 +100,6 @@ struct rpcrdma_ep {
 	wait_queue_head_t 	rep_connect_wait;
 	struct rpcrdma_connect_private	rep_cm_private;
 	struct rdma_conn_param	rep_remote_cma;
-	struct sockaddr_storage	rep_remote_addr;
 	struct delayed_work	rep_connect_worker;
 };
 
@@ -519,6 +518,18 @@ struct rpcrdma_xprt {
 #define rpcx_to_rdmax(x) container_of(x, struct rpcrdma_xprt, rx_xprt)
 #define rpcx_to_rdmad(x) (rpcx_to_rdmax(x)->rx_data)
 
+static inline const char *
+rpcrdma_addrstr(const struct rpcrdma_xprt *r_xprt)
+{
+	return r_xprt->rx_xprt.address_strings[RPC_DISPLAY_ADDR];
+}
+
+static inline const char *
+rpcrdma_portstr(const struct rpcrdma_xprt *r_xprt)
+{
+	return r_xprt->rx_xprt.address_strings[RPC_DISPLAY_PORT];
+}
+
 /* Setting this to 0 ensures interoperability with early servers.
  * Setting this to 1 enhances certain unaligned read/write performance.
  * Default is 0, see sysctl entry and rpc_rdma.c rpcrdma_convert_iovs() */