static void qcow2_close(BlockDriverState *bs)
{
    BDRVQcowState *s = bs->opaque;
    g_free(s->l1_table);
    /* else pre-write overlap checks in cache_destroy may crash */
    s->l1_table = NULL;

    if (!(bs->open_flags & BDRV_O_INCOMING)) {
        qcow2_cache_flush(bs, s->l2_table_cache);
        qcow2_cache_flush(bs, s->refcount_block_cache);

        qcow2_mark_clean(bs);
    }

    qcow2_cache_destroy(bs, s->l2_table_cache);
    qcow2_cache_destroy(bs, s->refcount_block_cache);

    g_free(s->unknown_header_fields);
    cleanup_unknown_header_ext(bs);

    g_free(s->cluster_cache);
    qemu_vfree(s->cluster_data);
    qcow2_refcount_close(bs);
    qcow2_free_snapshots(bs);
}
Unknown