/* $Id: tstVDDiscard.vd 82968 2020-02-04 10:35:17Z vboxsync $ */
/**
 * Storage: Testcase for discarding data in a disk.
 */

/*
 * Copyright (C) 2011-2020 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 */

void main()
{
    /* Init I/O RNG for generating random data for writes. */
    iorngcreate(10M, "manual", 1234567890);

    print("Testing VDI");

    /* Create disk containers, read verification is on. */
    createdisk("disk", true /* fVerify */);
    /* Create the disk. */
    create("disk", "base", "tstCompact.vdi", "dynamic", "VDI", 2G, false /* fIgnoreFlush */, false);
    /* Fill the disk with random data */
    io("disk", false, 1, "seq", 64K, 0, 200M, 200M, 100, "none");
    /* Read the data to verify it once. */
    io("disk", false, 1, "seq", 64K, 0, 200M, 200M,   0, "none");
    close("disk", "single", false);

    open("disk", "tstCompact.vdi", "VDI", true, false, false, true, false, false);
    printfilesize("disk", 0);
    discard("disk", true, "6,0M,512K,1M,512K,2M,512K,3M,512K,4M,512K,5M,512K");
    discard("disk", true, "6,6M,512K,7M,512K,8M,512K,9M,512K,10M,512K,11M,512K");
    discard("disk", true, "1,512K,512K");
    discard("disk", false, "1,1024K,64K");
    printfilesize("disk", 0);

    print("Discard whole block");
    discard("disk", true, "1,20M,1M");
    printfilesize("disk", 0);

    print("Split Discard");
    discard("disk", true, "1,21M,512K");
    printfilesize("disk", 0);
    discard("disk", true, "1,22016K,512K");
    printfilesize("disk", 0);

    /* Cleanup */
    close("disk", "single", true);
    destroydisk("disk");

    /* Destroy RNG and pattern */
    iorngdestroy();
}