LXR qemu/tests/drive

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