/*******************************************************************************

    Copyright(C) Jonas 'Sortie' Termansen 2012.

    This file is part of Sortix.

    Sortix 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, either version 3 of the License, or (at your option) any later
    version.

    Sortix 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.

    You should have received a copy of the GNU General Public License along with
    Sortix. If not, see <http://www.gnu.org/licenses/>.

    sortix/initrd.h
    The Sortix init ramdisk filesystem format.

*******************************************************************************/

#ifndef INCLUDE_SORTIX_INITRD_H
#define INCLUDE_SORTIX_INITRD_H

#include <stdint.h>

#include <sys/cdefs.h>

__BEGIN_DECLS

#define INITRD_ALGO_CRC32 0

#define INITRD_S_IXOTH 01
#define INITRD_S_IWOTH 02
#define INITRD_S_IROTH 03
#define INITRD_S_IRWXO 07
#define INITRD_S_IXGRP 010
#define INITRD_S_IWGRP 020
#define INITRD_S_IRGRP 040
#define INITRD_S_IRWXG 070
#define INITRD_S_IXUSR 0100
#define INITRD_S_IWUSR 0200
#define INITRD_S_IRUSR 0400
#define INITRD_S_IRWXU 0700
#define INITRD_S_IFMT 0xF000
#define INITRD_S_IFSOCK 0xC000
#define INITRD_S_IFLNK 0xA000
#define INITRD_S_IFREG 0x8000
#define INITRD_S_IFBLK 0x6000
#define INITRD_S_IFDIR 0x4000
#define INITRD_S_IFCHR 0x2000
#define INITRD_S_IFIFO 0x1000
/* Intentionally not part of Sortix. */
/*#define INITRD_S_ISUID 0x0800 */
/*#define INITRD_S_ISGID 0x0400 */
#define INITRD_S_ISVTX 0x0200
#define INITRD_S_ISSOCK(mode) ((mode & INITRD_S_IFMT) == INITRD_S_IFSOCK)
#define INITRD_S_ISLNK(mode) ((mode & INITRD_S_IFMT) == INITRD_S_IFLNK)
#define INITRD_S_ISREG(mode) ((mode & INITRD_S_IFMT) == INITRD_S_IFREG)
#define INITRD_S_ISBLK(mode) ((mode & INITRD_S_IFMT) == INITRD_S_IFBLK)
#define INITRD_S_ISDIR(mode) ((mode & INITRD_S_IFMT) == INITRD_S_IFDIR)
#define INITRD_S_ISCHR(mode) ((mode & INITRD_S_IFMT) == INITRD_S_IFCHR)
#define INITRD_S_ISFIFO(mode) ((mode & INITRD_S_IFMT) == INITRD_S_IFIFO)

typedef struct initrd_superblock
{
	char magic[16]; // "sortix-initrd-2"
	uint32_t fssize;
	uint32_t revision;
	uint32_t inodesize;
	uint32_t inodecount;
	uint32_t inodeoffset;
	uint32_t root;
	uint32_t sumalgorithm;
	uint32_t sumsize;
} initrd_superblock_t;

typedef struct initrd_inode
{
	uint32_t mode;
	uint32_t uid;
	uint32_t gid;
	uint32_t nlink;
	uint64_t ctime;
	uint64_t mtime;
	uint32_t dataoffset;
	uint32_t size;
} initrd_inode_t;

typedef struct initrd_dirent
{
	uint32_t inode;
	uint16_t reclen;
	uint16_t namelen;
	char name[0];
} initrd_dirent_t;

__END_DECLS

#endif