tests/drive_del-test.c

   1 /*
   2  * blockdev.c test cases
   3  *
   4  * Copyright (C) 2013-2014 Red Hat Inc.
   5  *
   6  * Authors:
   7  *  Stefan Hajnoczi <[email protected]>
   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(...) qobject_unref(qmp(__VA_ARGS__))
  20
  21 static void drive_add(void)
  22 {
  23     char *resp = hmp("drive_add 0 if=none,id=drive0");
  24
  25     g_assert_cmpstr(resp, ==, "OK\r\n");
  26     g_free(resp);
  27 }
  28
  29 static void drive_del(void)
  30 {
  31     char *resp = hmp("drive_del drive0");
  32
  33     g_assert_cmpstr(resp, ==, "");
  34     g_free(resp);
  35 }
  36
  37 static void device_del(void)
  38 {
  39     QDict *response;
  40
  41     /* Complication: ignore DEVICE_DELETED event */
  42     qmp_discard_response("{'execute': 'device_del',"
  43                          " 'arguments': { 'id': 'dev0' } }");
  44     response = qmp_receive();
  45     g_assert(response);
  46     g_assert(qdict_haskey(response, "return"));
  47     qobject_unref(response);
  48 }
  49
  50 static void test_drive_without_dev(void)
  51 {
  52     /* Start with an empty drive */
  53     qtest_start("-drive if=none,id=drive0");
  54
  55     /* Delete the drive */
  56     drive_del();
  57
  58     /* Ensure re-adding the drive works - there should be no duplicate ID error
  59      * because the old drive must be gone.
  60      */
  61     drive_add();
  62
  63     qtest_end();
  64 }
  65
  66 /*
  67  * qvirtio_get_dev_type:
  68  * Returns: the preferred virtio bus/device type for the current architecture.
  69  * TODO: delete this
  70  */
  71 static const char *qvirtio_get_dev_type(void)
  72 {
  73     const char *arch = qtest_get_arch();
  74
  75     if (g_str_equal(arch, "arm") || g_str_equal(arch, "aarch64")) {
  76         return "device";  /* for virtio-mmio */
  77     } else if (g_str_equal(arch, "s390x")) {
  78         return "ccw";
  79     } else {
  80         return "pci";
  81     }
  82 }
  83
  84 static void test_after_failed_device_add(void)
  85 {
  86     char driver[32];
  87     QDict *response;
  88
  89     snprintf(driver, sizeof(driver), "virtio-blk-%s",
  90              qvirtio_get_dev_type());
  91
  92     qtest_start("-drive if=none,id=drive0");
  93
  94     /* Make device_add fail. If this leaks the virtio-blk device then a
  95      * reference to drive0 will also be held (via qdev properties).
  96      */
  97     response = qmp("{'execute': 'device_add',"
  98                    " 'arguments': {"
  99                    "   'driver': %s,"
 100                    "   'drive': 'drive0'"
 101                    "}}", driver);
 102     g_assert(response);
 103     qmp_assert_error_class(response, "GenericError");
 104
 105     /* Delete the drive */
 106     drive_del();
 107
 108     /* Try to re-add the drive.  This fails with duplicate IDs if a leaked
 109      * virtio-blk device exists that holds a reference to the old drive0.
 110      */
 111     drive_add();
 112
 113     qtest_end();
 114 }
 115
 116 static void test_drive_del_device_del(void)
 117 {
 118     char *args;
 119
 120     /* Start with a drive used by a device that unplugs instantaneously */
 121     args = g_strdup_printf("-drive if=none,id=drive0,file=null-co://,format=raw"
 122                            " -device virtio-scsi-%s"
 123                            " -device scsi-hd,drive=drive0,id=dev0",
 124                            qvirtio_get_dev_type());
 125     qtest_start(args);
 126
 127     /*
 128      * Delete the drive, and then the device
 129      * Doing it in this order takes notoriously tricky special paths
 130      */
 131     drive_del();
 132     device_del();
 133
 134     qtest_end();
 135     g_free(args);
 136 }
 137
 138 int main(int argc, char **argv)
 139 {
 140     g_test_init(&argc, &argv, NULL);
 141
 142     qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 143
 144     if (qvirtio_get_dev_type() != NULL) {
 145         qtest_add_func("/drive_del/after_failed_device_add",
 146                        test_after_failed_device_add);
 147         qtest_add_func("/blockdev/drive_del_device_del",
 148                        test_drive_del_device_del);
 149     }
 150
 151     return g_test_run();
 152 }