/* $Id: tstVDDiscard.vd 106061 2024-09-16 14:03:52Z vboxsync $ */
/**
 * Storage: Testcase for discarding data in a disk.
 */

/*
 * Copyright (C) 2011-2024 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, in version 3 of the
 * License.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <https://www.gnu.org/licenses>.
 *
 * SPDX-License-Identifier: GPL-3.0-only
 */

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();
}