qemu/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 <glib.h>
  14 #include <string.h>
  15 #include "libqtest.h"
  16
  17 static void drive_add(void)
  18 {
  19     QDict *response;
  20
  21     response = qmp("{'execute': 'human-monitor-command',"
  22                    " 'arguments': {"
  23                    "   'command-line': 'drive_add 0 if=none,id=drive0'"
  24                    "}}");
  25     g_assert(response);
  26     g_assert_cmpstr(qdict_get_try_str(response, "return"), ==, "OK\r\n");
  27     QDECREF(response);
  28 }
  29
  30 static void drive_del(void)
  31 {
  32     QDict *response;
  33
  34     response = qmp("{'execute': 'human-monitor-command',"
  35                    " 'arguments': {"
  36                    "   'command-line': 'drive_del drive0'"
  37                    "}}");
  38     g_assert(response);
  39     g_assert_cmpstr(qdict_get_try_str(response, "return"), ==, "");
  40     QDECREF(response);
  41 }
  42
  43 static void device_del(void)
  44 {
  45     QDict *response;
  46
  47     /* Complication: ignore DEVICE_DELETED event */
  48     qmp_discard_response("{'execute': 'device_del',"
  49                          " 'arguments': { 'id': 'dev0' } }");
  50     response = qmp_receive();
  51     g_assert(response);
  52     g_assert(qdict_haskey(response, "return"));
  53     QDECREF(response);
  54 }
  55
  56 static void test_drive_without_dev(void)
  57 {
  58     /* Start with an empty drive */
  59     qtest_start("-drive if=none,id=drive0");
  60
  61     /* Delete the drive */
  62     drive_del();
  63
  64     /* Ensure re-adding the drive works - there should be no duplicate ID error
  65      * because the old drive must be gone.
  66      */
  67     drive_add();
  68
  69     qtest_end();
  70 }
  71
  72 static void test_after_failed_device_add(void)
  73 {
  74     QDict *response;
  75     QDict *error;
  76
  77     qtest_start("-drive if=none,id=drive0");
  78
  79     /* Make device_add fail.  If this leaks the virtio-blk-pci device then a
  80      * reference to drive0 will also be held (via qdev properties).
  81      */
  82     response = qmp("{'execute': 'device_add',"
  83                    " 'arguments': {"
  84                    "   'driver': 'virtio-blk-pci',"
  85                    "   'drive': 'drive0'"
  86                    "}}");
  87     g_assert(response);
  88     error = qdict_get_qdict(response, "error");
  89     g_assert_cmpstr(qdict_get_try_str(error, "class"), ==, "GenericError");
  90     QDECREF(response);
  91
  92     /* Delete the drive */
  93     drive_del();
  94
  95     /* Try to re-add the drive.  This fails with duplicate IDs if a leaked
  96      * virtio-blk-pci exists that holds a reference to the old drive0.
  97      */
  98     drive_add();
  99
 100     qtest_end();
 101 }
 102
 103 static void test_drive_del_device_del(void)
 104 {
 105     /* Start with a drive used by a device that unplugs instantaneously */
 106     qtest_start("-drive if=none,id=drive0,file=/dev/null,format=raw"
 107                 " -device virtio-scsi-pci"
 108                 " -device scsi-hd,drive=drive0,id=dev0");
 109
 110     /*
 111      * Delete the drive, and then the device
 112      * Doing it in this order takes notoriously tricky special paths
 113      */
 114     drive_del();
 115     device_del();
 116
 117     qtest_end();
 118 }
 119
 120 int main(int argc, char **argv)
 121 {
 122     const char *arch = qtest_get_arch();
 123
 124     g_test_init(&argc, &argv, NULL);
 125
 126     qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 127
 128     /* TODO I guess any arch with PCI would do */
 129     if (!strcmp(arch, "i386") || !strcmp(arch, "x86_64")) {
 130         qtest_add_func("/drive_del/after_failed_device_add",
 131                        test_after_failed_device_add);
 132         qtest_add_func("/blockdev/drive_del_device_del",
 133                        test_drive_del_device_del);
 134     }
 135
 136     return g_test_run();
 137 }