Archipelago » qemu

{

    int fd, header_size, backing_filename_len, l1_size, i, shift, l2_bits;

    QCowHeader header;

    uint64_t tmp, offset;

    QCowCreateState s1, *s = &s1;

    offset += align_offset(l1_size * sizeof(uint64_t), s->cluster_size);

    s->refcount_table = qemu_mallocz(s->cluster_size);

    s->refcount_table_offset = offset;

    header.refcount_table_offset = cpu_to_be64(offset);

    header.refcount_table_clusters = cpu_to_be32(1);

    offset += s->cluster_size;

    s->refcount_block_offset = offset;

    /* update refcounts */

    create_refcount_update(s, 0, header_size);

    create_refcount_update(s, s->l1_table_offset, l1_size * sizeof(uint64_t));

    create_refcount_update(s, s->refcount_table_offset, s->cluster_size);

    /* write all the data */

    write(fd, &header, sizeof(header));

    write(fd, s->refcount_table, s->cluster_size);

    lseek(fd, s->refcount_block_offset, SEEK_SET);

    qemu_free(s->refcount_table);

    qemu_free(s->refcount_block);