[PATCH 11/12] tests/9pfs: add virtio_9p_test_path()

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

This new public function virtio_9p_test_path() allows 9pfs
'local' tests to translate a path from guest scope to host
scope. For instance by passing an empty string it would
return the root path on host of the exported 9pfs tree.

Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
---
 tests/qtest/libqos/virtio-9p.c | 6 ++++++
 tests/qtest/libqos/virtio-9p.h | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/tests/qtest/libqos/virtio-9p.c b/tests/qtest/libqos/virtio-9p.c
index b44fc4ad63..599b73a9d7 100644
--- a/tests/qtest/libqos/virtio-9p.c
+++ b/tests/qtest/libqos/virtio-9p.c
@@ -92,6 +92,12 @@ static void remove_local_test_dir(void)
     g_free(cmd);
 }
 
+char *virtio_9p_test_path(const char *path)
+{
+    g_assert(local_test_path);
+    return concat_path(local_test_path, path);
+}
+
 static void virtio_9p_cleanup(QVirtio9P *interface)
 {
     qvirtqueue_cleanup(interface->vdev->bus, interface->vq, alloc);
diff --git a/tests/qtest/libqos/virtio-9p.h b/tests/qtest/libqos/virtio-9p.h
index 20d1fc6270..052882ef7c 100644
--- a/tests/qtest/libqos/virtio-9p.h
+++ b/tests/qtest/libqos/virtio-9p.h
@@ -45,4 +45,9 @@ struct QVirtio9PDevice {
     QVirtio9P v9p;
 };
 
+/**
+ * Returns path on host to the passed guest path. Result must be freed.
+ */
+char *virtio_9p_test_path(const char *path);
+
 #endif
-- 
2.20.1