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 /* 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 static void test_after_failed_device_add(void)
  67 {
  68     QDict *response;
  69     QDict *error;
  70
  71     qtest_start("-drive if=none,id=drive0");
  72
  73     /* Make device_add fail. If this leaks the virtio-blk device then a
  74      * reference to drive0 will also be held (via qdev properties).
  75      */
  76     response = qmp("{'execute': 'device_add',"
  77                    " 'arguments': {"
  78                    "   'driver': 'virtio-blk-%s',"
  79                    "   'drive': 'drive0'"
  80                    "}}", qvirtio_get_dev_type());
  81     g_assert(response);
  82     error = qdict_get_qdict(response, "error");
  83     g_assert_cmpstr(qdict_get_try_str(error, "class"), ==, "GenericError");
  84     qobject_unref(response);
  85
  86     /* Delete the drive */
  87     drive_del();
  88
  89     /* Try to re-add the drive.  This fails with duplicate IDs if a leaked
  90      * virtio-blk device exists that holds a reference to the old drive0.
  91      */
  92     drive_add();
  93
  94     qtest_end();
  95 }
  96
  97 static void test_drive_del_device_del(void)
  98 {
  99     char *args;
 100
 101     /* Start with a drive used by a device that unplugs instantaneously */
 102     args = g_strdup_printf("-drive if=none,id=drive0,file=null-co://,format=raw"
 103                            " -device virtio-scsi-%s"
 104                            " -device scsi-hd,drive=drive0,id=dev0",
 105                            qvirtio_get_dev_type());
 106     qtest_start(args);
 107
 108     /*
 109      * Delete the drive, and then the device
 110      * Doing it in this order takes notoriously tricky special paths
 111      */
 112     drive_del();
 113     device_del();
 114
 115     qtest_end();
 116     g_free(args);
 117 }
 118
 119 int main(int argc, char **argv)
 120 {
 121     const char *arch = qtest_get_arch();
 122
 123     g_test_init(&argc, &argv, NULL);
 124
 125     qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 126
 127     /* TODO I guess any arch with a hot-pluggable virtio bus would do */
 128     if (!strcmp(arch, "i386") || !strcmp(arch, "x86_64") ||
 129         !strcmp(arch, "ppc") || !strcmp(arch, "ppc64") ||
 130         !strcmp(arch, "s390x")) {
 131         qtest_add_func("/drive_del/after_failed_device_add",
 132                        test_after_failed_device_add);
 133         qtest_add_func("/blockdev/drive_del_device_del",
 134                        test_drive_del_device_del);
 135     }
 136
 137     return g_test_run();
 138 }