From: Hans-Joachim Picht <hpicht@redhat.com>
Date: Fri, 27 Feb 2009 20:51:35 +0100
Subject: [s390] af_iucv: new error return codes for connect
Message-id: 20090227195135.GP2447@redhat.com
O-Subject: [RHEL5 U4 PATCH 2/7] s390 - af_iucv: New error return codes for connect()
Bugzilla: 487697

Description
============

If the iucv_path_connect() call fails then return an error code that
corresponds to the iucv_path_connect() failure condition; instead of
returning -ECONNREFUSED for any failure.

This helps to improve error handling for user space applications
(e.g.  inform the user that the z/VM guest is not authorized to
connect to other guest virtual machines).

The error return codes are based on those described in connect(2).

Bugzilla
=========

BZ 487697
https://bugzilla.redhat.com/show_bug.cgi?id=487697

Upstream status of the patch:
=============================

This patch is included in linux-2.6 as
git commit 55cdea9ed9cf2d76993e40ed7a1fc649a14db07c

Test status:
============

The patch has been tested and fixes the problem.
The fix has been verified by the IBM test department.

Please ACK.

With best regards,

	--Hans

diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index 8038be3..acaa174 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -494,7 +494,21 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
 	if (err) {
 		iucv_path_free(iucv->path);
 		iucv->path = NULL;
-		err = -ECONNREFUSED;
+		switch (err) {
+		case 0x0b:	/* Target communicator is not logged on */
+			err = -ENETUNREACH;
+			break;
+		case 0x0d:	/* Max connections for this guest exceeded */
+		case 0x0e:	/* Max connections for target guest exceeded */
+			err = -EAGAIN;
+			break;
+		case 0x0f:	/* Missing IUCV authorization */
+			err = -EACCES;
+			break;
+		default:
+			err = -ECONNREFUSED;
+			break;
+		}
 		goto done;
 	}