[PATCH 08/12] libqtest: add qtest_socket_server()

[Stefan Hajnoczi <stefanha@redhat.com>]

There is a qtest_socket_client() API. Add an equivalent
qtest_socket_server() API that returns a new UNIX domain socket in the
listen state. The code for this was already there but only used
internally in init_socket().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 tests/qtest/libqos/libqtest.h |  8 +++++++
 tests/qtest/libqtest.c        | 40 ++++++++++++++++++++---------------
 2 files changed, 31 insertions(+), 17 deletions(-)

diff --git a/tests/qtest/libqos/libqtest.h b/tests/qtest/libqos/libqtest.h
index 241b5f89fb..699be8c2a2 100644
--- a/tests/qtest/libqos/libqtest.h
+++ b/tests/qtest/libqos/libqtest.h
@@ -132,6 +132,14 @@ void qtest_qmp_send(QTestState *s, const char *fmt, ...)
 void qtest_qmp_send_raw(QTestState *s, const char *fmt, ...)
     GCC_FMT_ATTR(2, 3);
 
+/**
+ * qtest_socket_server:
+ * @socket_path: the UNIX domain socket path
+ *
+ * Create and return a listen socket file descriptor, or abort on failure.
+ */
+int qtest_socket_server(const char *socket_path);
+
 /**
  * qtest_socket_client:
  * @server_socket_path: the socket server's path
diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c
index ab34075f2b..d652ffc90d 100644
--- a/tests/qtest/libqtest.c
+++ b/tests/qtest/libqtest.c
@@ -82,24 +82,8 @@ static void qtest_client_set_rx_handler(QTestState *s, QTestRecvFn recv);
 
 static int init_socket(const char *socket_path)
 {
-    struct sockaddr_un addr;
-    int sock;
-    int ret;
-
-    sock = socket(PF_UNIX, SOCK_STREAM, 0);
-    g_assert_cmpint(sock, !=, -1);
-
-    addr.sun_family = AF_UNIX;
-    snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
+    int sock = qtest_socket_server(socket_path);
     qemu_set_cloexec(sock);
-
-    do {
-        ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
-    } while (ret == -1 && errno == EINTR);
-    g_assert_cmpint(ret, !=, -1);
-    ret = listen(sock, 1);
-    g_assert_cmpint(ret, !=, -1);
-
     return sock;
 }
 
@@ -638,6 +622,28 @@ QTestState *qtest_create_state_with_qmp_fd(int fd)
     return qmp_test_state;
 }
 
+int qtest_socket_server(const char *socket_path)
+{
+    struct sockaddr_un addr;
+    int sock;
+    int ret;
+
+    sock = socket(PF_UNIX, SOCK_STREAM, 0);
+    g_assert_cmpint(sock, !=, -1);
+
+    addr.sun_family = AF_UNIX;
+    snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
+
+    do {
+        ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
+    } while (ret == -1 && errno == EINTR);
+    g_assert_cmpint(ret, !=, -1);
+    ret = listen(sock, 1);
+    g_assert_cmpint(ret, !=, -1);
+
+    return sock;
+}
+
 int qtest_socket_client(char *server_socket_path)
 {
     struct sockaddr_un serv_addr;
-- 
2.26.2