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     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-pci 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-pci',"
  75                    "   'drive': 'drive0'"
  76                    "}}");
  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-pci 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     /* Start with a drive used by a device that unplugs instantaneously */
  96     qtest_start("-drive if=none,id=drive0,file=/dev/null,format=raw"
  97                 " -device virtio-scsi-pci"
  98                 " -device scsi-hd,drive=drive0,id=dev0");
  99
 100     /*
 101      * Delete the drive, and then the device
 102      * Doing it in this order takes notoriously tricky special paths
 103      */
 104     drive_del();
 105     device_del();
 106
 107     qtest_end();
 108 }
 109
 110 int main(int argc, char **argv)
 111 {
 112     const char *arch = qtest_get_arch();
 113
 114     g_test_init(&argc, &argv, NULL);
 115
 116     qtest_add_func("/drive_del/without-dev", test_drive_without_dev);
 117
 118     /* TODO I guess any arch with PCI would do */
 119     if (!strcmp(arch, "i386") || !strcmp(arch, "x86_64")) {
 120         qtest_add_func("/drive_del/after_failed_device_add",
 121                        test_after_failed_device_add);
 122         qtest_add_func("/blockdev/drive_del_device_del",
 123                        test_drive_del_device_del);
 124     }
 125
 126     return g_test_run();
 127 }