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
  16static void drive_add(void)
  17{
  18    char *resp = hmp("drive_add 0 if=none,id=drive0");
  19
  20    g_assert_cmpstr(resp, ==, "OK\r\n");
  21    g_free(resp);
  22}
  23
  24static void drive_del(void)
  25{
  26    char *resp = hmp("drive_del drive0");
  27
  28    g_assert_cmpstr(resp, ==, "");
  29    g_free(resp);
  30}
  31
  32static void device_del(void)
  33{
  34    QDict *response;
  35
  36    /* Complication: ignore DEVICE_DELETED event */
  37    qmp_discard_response("{'execute': 'device_del',"
  38                         " 'arguments': { 'id': 'dev0' } }");
  39    response = qmp_receive();
  40    g_assert(response);
  41    g_assert(qdict_haskey(response, "return"));
  42    QDECREF(response);
  43}
  44
  45static void test_drive_without_dev(void)
  46{
  47    /* Start with an empty drive */
  48    qtest_start("-drive if=none,id=drive0");
  49
  50    /* Delete the drive */
  51    drive_del();
  52
  53    /* Ensure re-adding the drive works - there should be no duplicate ID error
  54     * because the old drive must be gone.
  55     */
  56    drive_add();
  57
  58    qtest_end();
  59}
  60
  61static void test_after_failed_device_add(void)
  62{
  63    QDict *response;
  64    QDict *error;
  65
  66    qtest_start("-drive if=none,id=drive0");
  67
  68    /* Make device_add fail.  If this leaks the virtio-blk-pci device then a
  69     * reference to drive0 will also be held (via qdev properties).
  70     */
  71    response = qmp("{'execute': 'device_add',"
  72                   " 'arguments': {"
  73                   "   'driver': 'virtio-blk-pci',"
  74                   "   'drive': 'drive0'"
  75                   "}}");
  76    g_assert(response);
  77    error = qdict_get_qdict(response, "error");
  78    g_assert_cmpstr(qdict_get_try_str(error, "class"), ==, "GenericError");
  79    QDECREF(response);
  80
  81    /* Delete the drive */
  82    drive_del();
  83
  84    /* Try to re-add the drive.  This fails with duplicate IDs if a leaked
  85     * virtio-blk-pci exists that holds a reference to the old drive0.
  86     */
  87    drive_add();
  88
  89    qtest_end();
  90}
  91
  92static void test_drive_del_device_del(void)
  93{
  94    /* Start with a drive used by a device that unplugs instantaneously */
  95    qtest_start("-drive if=none,id=drive0,file=/dev/null,format=raw"
  96                " -device virtio-scsi-pci"
  97                " -device scsi-hd,drive=drive0,id=dev0");
  98
  99    /*
 100     * Delete the drive, and then the device
 101     * Doing it in this order takes notoriously tricky special paths
 102     */
 103    drive_del();
 104    device_del();
 105
 106    qtest_end();
 107}
 108
 109int main(int argc, char **argv)
 110{
 111    const char *arch = qtest_get_arch();
 112
 113    g_test_init(&argc, &argv, NULL);
 114
 115    qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 116
 117    /* TODO I guess any arch with PCI would do */
 118    if (!strcmp(arch, "i386") || !strcmp(arch, "x86_64") ||
 119        !strcmp(arch, "ppc") || !strcmp(arch, "ppc64")) {
 120        qtest_add_func("/drive_del/after_failed_device_add",
 121                       test_after_failed_device_add);
 122        qtest_add_func("/blockdev/drive_del_device_del",
 123                       test_drive_del_device_del);
 124    }
 125
 126    return g_test_run();
 127}
 128