path: root/drivers/mtd/ubi/fastmap.c

/*
 * Copyright (c) 2012 Linutronix GmbH
 * Author: Richard Weinberger <richard@nod.at>
 *
 * 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; version 2.
 *
 * 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.
 *
 */

#include <linux/crc32.h>
#include "ubi.h"

/**
 * ubi_calc_fm_size - calculates the fastmap size in bytes for an UBI device.
 * @ubi: UBI device description object
 */
size_t ubi_calc_fm_size(struct ubi_device *ubi)
{
	size_t size;

	size = sizeof(struct ubi_fm_hdr) + \
		sizeof(struct ubi_fm_scan_pool) + \
		sizeof(struct ubi_fm_scan_pool) + \
		(ubi->peb_count * sizeof(struct ubi_fm_ec)) + \
		(sizeof(struct ubi_fm_eba) + \
		(ubi->peb_count * sizeof(__be32))) + \
		sizeof(struct ubi_fm_volhdr)