Archipelago » qemu

        be32_to_cpu(cow_header.version) != COW_VERSION) {

        goto fail;

    }

    /* cow image found */

    size = be64_to_cpu(cow_header.size);

    bs->total_sectors = size / 512;

    pstrcpy(bs->backing_file, sizeof(bs->backing_file),

            cow_header.backing_file);

    /* mmap the bitmap */

    s->cow_bitmap_size = ((bs->total_sectors + 7) >> 3) + sizeof(cow_header);

    s->cow_bitmap_addr = mmap(get_mmap_addr(s->cow_bitmap_size),

{

    BDRVCowState *s = bs->opaque;

    int ret, n;

    while (nb_sectors > 0) {

        if (is_changed(s->cow_bitmap, sector_num, nb_sectors, &n)) {

            lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET);

{

    BDRVCowState *s = bs->opaque;

    int ret, i;

    lseek(s->fd, s->cow_sectors_offset + sector_num * 512, SEEK_SET);

    ret = write(s->fd, buf, nb_sectors * 512);

    if (ret != nb_sectors * 512)