[Qemu-devel] [PATCH v2 3/4] virtio-blk-test.c: add hotplug subtest

[Amos Kong <akong@redhat.com>]

This patch adds a new subtest, it hotplugs 29 * 8 = 232 virtio-blk
devices to guest, and try to hot-unplug them.

Note: the hot-unplug can't work without cooperation of guest OS.

Signed-off-by: Amos Kong <akong@redhat.com>
---
 tests/virtio-blk-test.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tests/virtio-blk-test.c b/tests/virtio-blk-test.c
index 0fdec01..616599a 100644
--- a/tests/virtio-blk-test.c
+++ b/tests/virtio-blk-test.c
@@ -7,11 +7,48 @@
  * See the COPYING file in the top-level directory.
  */
 
+#include <stdio.h>
 #include <glib.h>
 #include <string.h>
 #include "libqtest.h"
 #include "qemu/osdep.h"
 
+static void test_blk_hotplug(void)
+{
+    char addr[6];
+    char cmd[100];
+    int i, j;
+
+    /* start with no network/block device, slots 3~0x1f are free */
+    qtest_start("-net none");
+
+    for (i = 3; i <= 0x1f; i++) {
+        for (j = 7; j >= 0; j--) {
+            sprintf(addr, "%x.%x", i, j);
+            sprintf(cmd, "drive_add 0 if=none,file=/dev/null,id=drv-%s", addr);
+            qmp_exec_hmp_cmd(cmd, "OK\r\n");
+
+            sprintf(cmd, "device_add virtio-blk-pci,id=dev-%s,drive=drv-%s,"
+                         "addr=0x%s,multifunction=on", addr, addr, addr);
+            qmp_exec_hmp_cmd(cmd, "");
+        }
+    }
+
+    /* hot-unplug doesn't work without cooperation of guest OS */
+    for (i = 3; i <= 0x1f; i++) {
+        for (j = 7; j >= 0; j--) {
+            sprintf(addr, "%x.%x", i, j);
+            sprintf(cmd, "drive_del drv-%s", addr);
+            qmp_exec_hmp_cmd(cmd, "");
+
+            sprintf(cmd, "device_del dev-%s", addr);
+            qmp_exec_hmp_cmd(cmd, "");
+        }
+    }
+
+    qtest_end();
+}
+
 /* Tests only initialization */
 static void virtblk_init(void)
 {
@@ -26,6 +63,7 @@ int main(int argc, char **argv)
 
     g_test_init(&argc, &argv, NULL);
     qtest_add_func("/virtio/blk/pci/init", virtblk_init);
+    qtest_add_func("/virtio/blk/pci/hotplug", test_blk_hotplug);
 
     ret = g_test_run();
 
-- 
1.9.3