static int parallels_create(const char *filename, QemuOpts *opts, Error **errp) { int64_t total_size, cl_size; uint8_t tmp[BDRV_SECTOR_SIZE]; Error *local_err = NULL; BlockBackend *file; uint32_t bat_entries, bat_sectors; ParallelsHeader header; int ret; total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), BDRV_SECTOR_SIZE); cl_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, DEFAULT_CLUSTER_SIZE), BDRV_SECTOR_SIZE); ret = bdrv_create_file(filename, opts, &local_err); if (ret < 0) { return ret; file = blk_new_open(filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err); if (file == NULL) { return -EIO; blk_set_allow_write_beyond_eof(file, true); ret = blk_truncate(file, 0); if (ret < 0) { goto exit; bat_entries = DIV_ROUND_UP(total_size, cl_size); bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size); bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS; memset(&header, 0, sizeof(header)); memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic)); header.version = cpu_to_le32(HEADER_VERSION); /* don't care much about geometry, it is not used on image level */ header.heads = cpu_to_le32(16); header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE / 16 / 32); header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS); header.bat_entries = cpu_to_le32(bat_entries); header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE)); header.data_off = cpu_to_le32(bat_sectors); /* write all the data */ memset(tmp, 0, sizeof(tmp)); memcpy(tmp, &header, sizeof(header)); ret = blk_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE, 0); if (ret < 0) { goto exit; ret = blk_pwrite_zeroes(file, BDRV_SECTOR_SIZE, (bat_sectors - 1) << BDRV_SECTOR_BITS, 0); if (ret < 0) { goto exit; ret = 0; done: blk_unref(file); return ret; exit: error_setg_errno(errp, -ret, "Failed to create Parallels image"); goto done;