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
  17 static 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
  25 static void drive_del(void)
  26 {
  27     char *resp = hmp("drive_del drive0");
  28
  29     g_assert_cmpstr(resp, ==, "");
  30     g_free(resp);
  31 }
  32
  33 static 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
  46 static 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
  62 static 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
  93 static 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
 115 int 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 }