VirtualBox

source: vbox/trunk/src/VBox/Storage/testcase/VDIoRnd.cpp@ 102493

Last change on this file since 102493 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1/* $Id: VDIoRnd.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * VBox HDD container test utility - I/O data generator.
4 */
5
6/*
7 * Copyright (C) 2011-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28#define LOGGROUP LOGGROUP_DEFAULT
29#include <iprt/log.h>
30#include <iprt/errcore.h>
31#include <iprt/mem.h>
32#include <iprt/rand.h>
33#include <iprt/assert.h>
34
35#include "VDIoRnd.h"
36
37/**
38 * I/O random data generator instance data.
39 */
40typedef struct VDIORND
41{
42 /** Pointer to the buffer holding the random data. */
43 uint8_t *pbPattern;
44 /** Size of the buffer. */
45 size_t cbPattern;
46 /** RNG */
47 RTRAND hRand;
48} VDIORND;
49
50int VDIoRndCreate(PPVDIORND ppIoRnd, size_t cbPattern, uint64_t uSeed)
51{
52 PVDIORND pIoRnd = NULL;
53 int rc = VINF_SUCCESS;
54
55 AssertPtrReturn(ppIoRnd, VERR_INVALID_POINTER);
56
57 pIoRnd = (PVDIORND)RTMemAllocZ(sizeof(VDIORND));
58 if (pIoRnd)
59 pIoRnd->pbPattern = (uint8_t *)RTMemPageAllocZ(cbPattern);
60
61 if ( pIoRnd
62 && pIoRnd->pbPattern)
63 {
64 pIoRnd->cbPattern = cbPattern;
65
66 rc = RTRandAdvCreateParkMiller(&pIoRnd->hRand);
67 if (RT_SUCCESS(rc))
68 {
69 RTRandAdvSeed(pIoRnd->hRand, uSeed);
70 RTRandAdvBytes(pIoRnd->hRand, pIoRnd->pbPattern, cbPattern);
71 }
72 else
73 {
74 RTMemPageFree(pIoRnd->pbPattern, cbPattern);
75 RTMemFree(pIoRnd);
76 }
77 }
78 else
79 {
80 if (pIoRnd)
81 RTMemFree(pIoRnd);
82 rc = VERR_NO_MEMORY;
83 }
84
85 if (RT_SUCCESS(rc))
86 *ppIoRnd = pIoRnd;
87
88 return rc;
89}
90
91void VDIoRndDestroy(PVDIORND pIoRnd)
92{
93 AssertPtrReturnVoid(pIoRnd);
94
95 RTRandAdvDestroy(pIoRnd->hRand);
96 RTMemPageFree(pIoRnd->pbPattern, pIoRnd->cbPattern);
97 RTMemFree(pIoRnd);
98}
99
100int VDIoRndGetBuffer(PVDIORND pIoRnd, void **ppv, size_t cb)
101{
102 AssertPtrReturn(pIoRnd, VERR_INVALID_POINTER);
103 AssertPtrReturn(ppv, VERR_INVALID_POINTER);
104 AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
105
106 if (cb > pIoRnd->cbPattern - 512)
107 return VERR_INVALID_PARAMETER;
108
109 *ppv = pIoRnd->pbPattern + RT_ALIGN_64(RTRandAdvU64Ex(pIoRnd->hRand, 0, pIoRnd->cbPattern - cb - 512), 512);
110 return VINF_SUCCESS;
111}
112
113
114uint32_t VDIoRndGetU32Ex(PVDIORND pIoRnd, uint32_t uMin, uint32_t uMax)
115{
116 return RTRandAdvU32Ex(pIoRnd->hRand, uMin, uMax);
117}
118
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