Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/unit/test-write-threshold.c b/tests/unit/test-write-threshold.c
new file mode 100644
index 000000000..0158e4637
--- /dev/null
+++ b/tests/unit/test-write-threshold.c
@@ -0,0 +1,47 @@
+/*
+ * Test block device write threshold
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "block/block_int.h"
+#include "block/write-threshold.h"
+
+
+static void test_threshold_not_trigger(void)
+{
+    uint64_t threshold = 4 * 1024 * 1024;
+    BlockDriverState bs;
+
+    memset(&bs, 0, sizeof(bs));
+
+    bdrv_write_threshold_set(&bs, threshold);
+    bdrv_write_threshold_check_write(&bs, 1024, 1024);
+    g_assert_cmpuint(bdrv_write_threshold_get(&bs), ==, threshold);
+}
+
+
+static void test_threshold_trigger(void)
+{
+    uint64_t threshold = 4 * 1024 * 1024;
+    BlockDriverState bs;
+
+    memset(&bs, 0, sizeof(bs));
+
+    bdrv_write_threshold_set(&bs, threshold);
+    bdrv_write_threshold_check_write(&bs, threshold - 1024, 2 * 1024);
+    g_assert_cmpuint(bdrv_write_threshold_get(&bs), ==, 0);
+}
+
+
+int main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+    g_test_add_func("/write-threshold/not-trigger", test_threshold_not_trigger);
+    g_test_add_func("/write-threshold/trigger", test_threshold_trigger);
+
+    return g_test_run();
+}