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#include "qapi/qmp/qdict.h"
  17
  18/* TODO actually test the results and get rid of this */
  19#define qmp_discard_response(q, ...) qobject_unref(qtest_qmp(q, __VA_ARGS__))
  20
  21static void drive_add(QTestState *qts)
  22{
  23    char *resp = qtest_hmp(qts, "drive_add 0 if=none,id=drive0");
  24
  25    g_assert_cmpstr(resp, ==, "OK\r\n");
  26    g_free(resp);
  27}
  28
  29static void drive_del(QTestState *qts)
  30{
  31    char *resp = qtest_hmp(qts, "drive_del drive0");
  32
  33    g_assert_cmpstr(resp, ==, "");
  34    g_free(resp);
  35}
  36
  37static void device_del(QTestState *qts)
  38{
  39    QDict *response;
  40
  41    /* Complication: ignore DEVICE_DELETED event */
  42    qmp_discard_response(qts, "{'execute': 'device_del',"
  43                         " 'arguments': { 'id': 'dev0' } }");
  44    response = qtest_qmp_receive(qts);
  45    g_assert(response);
  46    g_assert(qdict_haskey(response, "return"));
  47    qobject_unref(response);
  48}
  49
  50static void test_drive_without_dev(void)
  51{
  52    QTestState *qts;
  53
  54    /* Start with an empty drive */
  55    qts = qtest_init("-drive if=none,id=drive0");
  56
  57    /* Delete the drive */
  58    drive_del(qts);
  59
  60    /* Ensure re-adding the drive works - there should be no duplicate ID error
  61     * because the old drive must be gone.
  62     */
  63    drive_add(qts);
  64
  65    qtest_quit(qts);
  66}
  67
  68/*
  69 * qvirtio_get_dev_type:
  70 * Returns: the preferred virtio bus/device type for the current architecture.
  71 * TODO: delete this
  72 */
  73static const char *qvirtio_get_dev_type(void)
  74{
  75    const char *arch = qtest_get_arch();
  76
  77    if (g_str_equal(arch, "arm") || g_str_equal(arch, "aarch64")) {
  78        return "device";  /* for virtio-mmio */
  79    } else if (g_str_equal(arch, "s390x")) {
  80        return "ccw";
  81    } else {
  82        return "pci";
  83    }
  84}
  85
  86static void test_after_failed_device_add(void)
  87{
  88    char driver[32];
  89    QDict *response;
  90    QTestState *qts;
  91
  92    snprintf(driver, sizeof(driver), "virtio-blk-%s",
  93             qvirtio_get_dev_type());
  94
  95    qts = qtest_init("-drive if=none,id=drive0");
  96
  97    /* Make device_add fail. If this leaks the virtio-blk device then a
  98     * reference to drive0 will also be held (via qdev properties).
  99     */
 100    response = qtest_qmp(qts, "{'execute': 'device_add',"
 101                              " 'arguments': {"
 102                              "   'driver': %s,"
 103                              "   'drive': 'drive0'"
 104                              "}}", driver);
 105    g_assert(response);
 106    qmp_assert_error_class(response, "GenericError");
 107
 108    /* Delete the drive */
 109    drive_del(qts);
 110
 111    /* Try to re-add the drive.  This fails with duplicate IDs if a leaked
 112     * virtio-blk device exists that holds a reference to the old drive0.
 113     */
 114    drive_add(qts);
 115
 116    qtest_quit(qts);
 117}
 118
 119static void test_drive_del_device_del(void)
 120{
 121    QTestState *qts;
 122
 123    /* Start with a drive used by a device that unplugs instantaneously */
 124    qts = qtest_initf("-drive if=none,id=drive0,file=null-co://,format=raw"
 125                      " -device virtio-scsi-%s"
 126                      " -device scsi-hd,drive=drive0,id=dev0",
 127                      qvirtio_get_dev_type());
 128
 129    /*
 130     * Delete the drive, and then the device
 131     * Doing it in this order takes notoriously tricky special paths
 132     */
 133    drive_del(qts);
 134    device_del(qts);
 135
 136    qtest_quit(qts);
 137}
 138
 139int main(int argc, char **argv)
 140{
 141    g_test_init(&argc, &argv, NULL);
 142
 143    qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 144
 145    if (qvirtio_get_dev_type() != NULL) {
 146        qtest_add_func("/drive_del/after_failed_device_add",
 147                       test_after_failed_device_add);
 148        qtest_add_func("/blockdev/drive_del_device_del",
 149                       test_drive_del_device_del);
 150    }
 151
 152    return g_test_run();
 153}
 154