We can have failure with the inet type test because the port address
is not allocated atomically and can be taken by another test between its
selection and the start of QEMU. To avoid that, use an unix socket with
a path that is unique

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
 tests/qtest/netdev-socket.c | 39 +++++++++++++++++--------------------
 1 file changed, 18 insertions(+), 21 deletions(-)

diff --git a/tests/qtest/netdev-socket.c b/tests/qtest/netdev-socket.c
index 9cf1b0698eba..097abc0230b9 100644
--- a/tests/qtest/netdev-socket.c
+++ b/tests/qtest/netdev-socket.c
@@ -189,28 +189,26 @@ static void wait_stream_disconnected(QTestState *qts, const char *id)
     qobject_unref(resp);
 }
 
-static void test_stream_inet_reconnect(void)
+static void test_stream_unix_reconnect(void)
 {
     QTestState *qts0, *qts1;
-    int port;
     SocketAddress *addr;
+    gchar *path;
 
-    port = inet_get_free_port(false);
+    path = g_strconcat(tmpdir, "/stream_unix_reconnect", NULL);
     qts0 = qtest_initf("-nodefaults -M none "
-                       "-netdev stream,id=st0,server=true,addr.type=inet,"
-                       "addr.ipv4=on,addr.ipv6=off,"
-                       "addr.host=127.0.0.1,addr.port=%d", port);
+                       "-netdev stream,id=st0,server=true,addr.type=unix,"
+                       "addr.path=%s", path);
 
     EXPECT_STATE(qts0, "st0: index=0,type=stream,\r\n", 0);
 
     qts1 = qtest_initf("-nodefaults -M none "
-                       "-netdev stream,server=false,id=st0,addr.type=inet,"
-                       "addr.ipv4=on,addr.ipv6=off,reconnect=1,"
-                       "addr.host=127.0.0.1,addr.port=%d", port);
+                       "-netdev stream,server=false,id=st0,addr.type=unix,"
+                       "addr.path=%s,reconnect=1", path);
 
     wait_stream_connected(qts0, "st0", &addr);
-    g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET);
-    g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1");
+    g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_UNIX);
+    g_assert_cmpstr(addr->u.q_unix.path, ==, path);
     qapi_free_SocketAddress(addr);
 
     /* kill server */
@@ -221,24 +219,23 @@ static void test_stream_inet_reconnect(void)
 
     /* restart server */
     qts0 = qtest_initf("-nodefaults -M none "
-                       "-netdev stream,id=st0,server=true,addr.type=inet,"
-                       "addr.ipv4=on,addr.ipv6=off,"
-                       "addr.host=127.0.0.1,addr.port=%d", port);
+                       "-netdev stream,id=st0,server=true,addr.type=unix,"
+                       "addr.path=%s", path);
 
     /* wait connection events*/
     wait_stream_connected(qts0, "st0", &addr);
-    g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET);
-    g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1");
+    g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_UNIX);
+    g_assert_cmpstr(addr->u.q_unix.path, ==, path);
     qapi_free_SocketAddress(addr);
 
     wait_stream_connected(qts1, "st0", &addr);
-    g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_INET);
-    g_assert_cmpstr(addr->u.inet.host, ==, "127.0.0.1");
-    g_assert_cmpint(atoi(addr->u.inet.port), ==, port);
+    g_assert_cmpint(addr->type, ==, SOCKET_ADDRESS_TYPE_UNIX);
+    g_assert_cmpstr(addr->u.q_unix.path, ==, path);
     qapi_free_SocketAddress(addr);
 
     qtest_quit(qts1);
     qtest_quit(qts0);
+    g_free(path);
 }
 
 static void test_stream_inet_ipv6(void)
@@ -517,8 +514,6 @@ int main(int argc, char **argv)
 #ifndef _WIN32
         qtest_add_func("/netdev/dgram/mcast", test_dgram_mcast);
 #endif
-        qtest_add_func("/netdev/stream/inet/reconnect",
-                       test_stream_inet_reconnect);
     }
     if (has_ipv6) {
         qtest_add_func("/netdev/stream/inet/ipv6", test_stream_inet_ipv6);
@@ -530,6 +525,8 @@ int main(int argc, char **argv)
         qtest_add_func("/netdev/dgram/unix", test_dgram_unix);
 #endif
         qtest_add_func("/netdev/stream/unix", test_stream_unix);
+        qtest_add_func("/netdev/stream/unix/reconnect",
+                       test_stream_unix_reconnect);
 #ifdef CONFIG_LINUX
         qtest_add_func("/netdev/stream/unix/abstract",
                        test_stream_unix_abstract);
-- 
2.39.2

On 03/05/2023 11.41, Laurent Vivier wrote:
> We can have failure with the inet type test because the port address
> is not allocated atomically and can be taken by another test between its
> selection and the start of QEMU. To avoid that, use an unix socket with
> a path that is unique
> 
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> ---
>   tests/qtest/netdev-socket.c | 39 +++++++++++++++++--------------------
>   1 file changed, 18 insertions(+), 21 deletions(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>

I'll queue this patch for my next pull request.

  Thomas