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