qemu/tests/drive_del-test.c
<<
>>
Prefs
   1/*
   2 * blockdev.c test cases
   3 *
   4 * Copyright (C) 2013-2014 Red Hat Inc.
   5 *
   6 * Authors:
   7 *  Stefan Hajnoczi <stefanha@redhat.com>
   8 *
   9 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
  10 * See the COPYING.LIB file in the top-level directory.
  11 */
  12
  13#include "qemu/osdep.h"
  14#include "libqtest.h"
  15#include "libqos/virtio.h"
  16#include "qapi/qmp/qdict.h"
  17
  18static void drive_add(void)
  19{
  20    char *resp = hmp("drive_add 0 if=none,id=drive0");
  21
  22    g_assert_cmpstr(resp, ==, "OK\r\n");
  23    g_free(resp);
  24}
  25
  26static void drive_del(void)
  27{
  28    char *resp = hmp("drive_del drive0");
  29
  30    g_assert_cmpstr(resp, ==, "");
  31    g_free(resp);
  32}
  33
  34static void device_del(void)
  35{
  36    QDict *response;
  37
  38    /* Complication: ignore DEVICE_DELETED event */
  39    qmp_discard_response("{'execute': 'device_del',"
  40                         " 'arguments': { 'id': 'dev0' } }");
  41    response = qmp_receive();
  42    g_assert(response);
  43    g_assert(qdict_haskey(response, "return"));
  44    QDECREF(response);
  45}
  46
  47static void test_drive_without_dev(void)
  48{
  49    /* Start with an empty drive */
  50    qtest_start("-drive if=none,id=drive0");
  51
  52    /* Delete the drive */
  53    drive_del();
  54
  55    /* Ensure re-adding the drive works - there should be no duplicate ID error
  56     * because the old drive must be gone.
  57     */
  58    drive_add();
  59
  60    qtest_end();
  61}
  62
  63static void test_after_failed_device_add(void)
  64{
  65    QDict *response;
  66    QDict *error;
  67
  68    qtest_start("-drive if=none,id=drive0");
  69
  70    /* Make device_add fail. If this leaks the virtio-blk device then a
  71     * reference to drive0 will also be held (via qdev properties).
  72     */
  73    response = qmp("{'execute': 'device_add',"
  74                   " 'arguments': {"
  75                   "   'driver': 'virtio-blk-%s',"
  76                   "   'drive': 'drive0'"
  77                   "}}", qvirtio_get_dev_type());
  78    g_assert(response);
  79    error = qdict_get_qdict(response, "error");
  80    g_assert_cmpstr(qdict_get_try_str(error, "class"), ==, "GenericError");
  81    QDECREF(response);
  82
  83    /* Delete the drive */
  84    drive_del();
  85
  86    /* Try to re-add the drive.  This fails with duplicate IDs if a leaked
  87     * virtio-blk device exists that holds a reference to the old drive0.
  88     */
  89    drive_add();
  90
  91    qtest_end();
  92}
  93
  94static void test_drive_del_device_del(void)
  95{
  96    char *args;
  97
  98    /* Start with a drive used by a device that unplugs instantaneously */
  99    args = g_strdup_printf("-drive if=none,id=drive0,file=null-co://,format=raw"
 100                           " -device virtio-scsi-%s"
 101                           " -device scsi-hd,drive=drive0,id=dev0",
 102                           qvirtio_get_dev_type());
 103    qtest_start(args);
 104
 105    /*
 106     * Delete the drive, and then the device
 107     * Doing it in this order takes notoriously tricky special paths
 108     */
 109    drive_del();
 110    device_del();
 111
 112    qtest_end();
 113    g_free(args);
 114}
 115
 116int main(int argc, char **argv)
 117{
 118    const char *arch = qtest_get_arch();
 119
 120    g_test_init(&argc, &argv, NULL);
 121
 122    qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 123
 124    /* TODO I guess any arch with a hot-pluggable virtio bus would do */
 125    if (!strcmp(arch, "i386") || !strcmp(arch, "x86_64") ||
 126        !strcmp(arch, "ppc") || !strcmp(arch, "ppc64") ||
 127        !strcmp(arch, "s390x")) {
 128        qtest_add_func("/drive_del/after_failed_device_add",
 129                       test_after_failed_device_add);
 130        qtest_add_func("/blockdev/drive_del_device_del",
 131                       test_drive_del_device_del);
 132    }
 133
 134    return g_test_run();
 135}
 136