lib/romfs.h

/*
 * Copyright (C) 2017 National Institute of Advanced Industrial Science
 *                    and Technology (AIST)
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of AIST nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

typedef uint32_t u32_be_t;

struct romfs_superblock {
	u32_be_t magic1;
	u32_be_t magic2;
	u32_be_t size;
	u32_be_t checksum;
};

struct romfs_i {
	u32_be_t next;
	u32_be_t dir_start;
	u32_be_t size;
	u32_be_t checksum;
};

enum {
	RFST_HARDLINK	= 0,
	RFST_DIR	= 1,
	RFST_SYMLINK	= 3,
};

typedef const struct romfs_i *romfs_inode_t;
typedef const struct romfs_superblock *romfs_t;

const void *
romfs_get_info(romfs_t romfs, const char *path, size_t *len, size_t *csum);
size_t
romfs_mount_check(romfs_t romfs);