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 <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 static 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
  26 static void drive_del(void)
  27 {
  28     char *resp = hmp("drive_del drive0");
  29
  30     g_assert_cmpstr(resp, ==, "");
  31     g_free(resp);
  32 }
  33
  34 static 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     qobject_unref(response);
  45 }
  46
  47 static 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
  63 static 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     qobject_unref(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
  94 static 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
 116 int 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 }