sk-inet: More detailed error parsing on unconnected socket

errno is no guaranteed to be clear if call exit with
success. Thus make sure we've ret negative here and
test for errno then.

http://bugzilla.openvz.org/show_bug.cgi?id=2412Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

sk-inet.c

@@ -167,8 +167,13 @@ static struct inet_sk_desc *gen_uncon_sk(int lfd, const struct fd_parms *p)
 	/* It should has no peer name */
 	aux = sizeof(address);
 	ret = getsockopt(lfd, SOL_SOCKET, SO_PEERNAME, &address, &aux);
-	if (ret != -1 || errno != ENOTCONN) {
-		pr_err("Errno %d returned from unconnected socket\n", errno);
+	if (ret < 0) {
+		if (errno != ENOTCONN) {
+			pr_perror("Unexpected error returned from unconnected socket");
+			goto err;
+		}
+	} else if (ret == 0) {
+		pr_err("Name resolved on unconnected socket\n");
 		goto err;
 	}