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(q, ...) qobject_unref(qtest_qmp(q, __VA_ARGS__))
  20
  21 static 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
  29 static 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
  37 static 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
  50 static 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  */
  73 static 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
  86 static 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
 119 static 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://,"
 125                       "file.read-zeroes=on,format=raw"
 126                       " -device virtio-scsi-%s"
 127                       " -device scsi-hd,drive=drive0,id=dev0",
 128                       qvirtio_get_dev_type());
 129
 130     /*
 131      * Delete the drive, and then the device
 132      * Doing it in this order takes notoriously tricky special paths
 133      */
 134     drive_del(qts);
 135     device_del(qts);
 136
 137     qtest_quit(qts);
 138 }
 139
 140 int main(int argc, char **argv)
 141 {
 142     g_test_init(&argc, &argv, NULL);
 143
 144     qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 145
 146     if (qvirtio_get_dev_type() != NULL) {
 147         qtest_add_func("/drive_del/after_failed_device_add",
 148                        test_after_failed_device_add);
 149         qtest_add_func("/blockdev/drive_del_device_del",
 150                        test_drive_del_device_del);
 151     }
 152
 153     return g_test_run();
 154 }