/*
* Name : qnx6_fs.h
* Author : Kai Bankett
* Function : qnx6 global filesystem definitions
* History : 17-01-2012 created
*/
#ifndef _LINUX_QNX6_FS_H
#define _LINUX_QNX6_FS_H

#include <linux/types.h>
#include <linux/magic.h>

#define QNX6_ROOT_INO 1

/* for di_status */
#define QNX6_FILE_DIRECTORY 0x01
#define QNX6_FILE_DELETED 0x02
#define QNX6_FILE_NORMAL 0x03

#define QNX6_SUPERBLOCK_SIZE 0x200 /* superblock always is 512 bytes */
#define QNX6_SUPERBLOCK_AREA 0x1000 /* area reserved for superblock */
#define QNX6_BOOTBLOCK_SIZE 0x2000 /* heading bootblock area */
#define QNX6_DIR_ENTRY_SIZE 0x20 /* dir entry size of 32 bytes */
#define QNX6_INODE_SIZE 0x80 /* each inode is 128 bytes */
#define QNX6_INODE_SIZE_BITS 7 /* inode entry size shift */

#define QNX6_NO_DIRECT_POINTERS 16 /* 16 blockptrs in sbl/inode */
#define QNX6_PTR_MAX_LEVELS 5 /* maximum indirect levels */

/* for filenames */
#define QNX6_SHORT_NAME_MAX 27
#define QNX6_LONG_NAME_MAX 510

/* list of mount options */
#define QNX6_MOUNT_MMI_FS 0x010000 /* mount as Audi MMI 3G fs */

/*
* This is the original qnx6 inode layout on disk.
* Each inode is 128 byte long.
*/
struct qnx6_inode_entry {
__fs64 di_size;
__fs32 di_uid;
__fs32 di_gid;
__fs32 di_ftime;
__fs32 di_mtime;
__fs32 di_atime;
__fs32 di_ctime;
__fs16 di_mode;
__fs16 di_ext_mode;
__fs32 di_block_ptr[QNX6_NO_DIRECT_POINTERS];
__u8 di_filelevels;
__u8 di_status;
__u8 di_unknown2[2];
__fs32 di_zero2[6];
};

/*
* Each directory entry is maximum 32 bytes long.
* If more characters or special characters required it is stored
* in the longfilenames structure.
*/
struct qnx6_dir_entry {
__fs32 de_inode;
__u8 de_size;
char de_fname[QNX6_SHORT_NAME_MAX];
};

/*
* Longfilename direntries have a different structure
*/
struct qnx6_long_dir_entry {
__fs32 de_inode;
__u8 de_size;
__u8 de_unknown[3];
__fs32 de_long_inode;
__fs32 de_checksum;
};

struct qnx6_long_filename {
__fs16 lf_size;
__u8 lf_fname[QNX6_LONG_NAME_MAX];
};

struct qnx6_root_node {
__fs64 size;
__fs32 ptr[QNX6_NO_DIRECT_POINTERS];
__u8 levels;
__u8 mode;
__u8 spare[6];
};

struct qnx6_super_block {
__fs32 sb_magic;
__fs32 sb_checksum;
__fs64 sb_serial;
__fs32 sb_ctime; /* time the fs was created */
__fs32 sb_atime; /* last access time */
__fs32 sb_flags;
__fs16 sb_version1; /* filesystem version information */
__fs16 sb_version2; /* filesystem version information */
__u8 sb_volumeid[16];
__fs32 sb_blocksize;
__fs32 sb_num_inodes;
__fs32 sb_free_inodes;
__fs32 sb_num_blocks;
__fs32 sb_free_blocks;
__fs32 sb_allocgroup;
struct qnx6_root_node Inode;
struct qnx6_root_node Bitmap;
struct qnx6_root_node Longfile;
struct qnx6_root_node Unknown;
};

/* Audi MMI 3G superblock layout is different to plain qnx6 */
struct qnx6_mmi_super_block {
__fs32 sb_magic;
__fs32 sb_checksum;
__fs64 sb_serial;
__u8 sb_spare0[12];
__u8 sb_id[12];
__fs32 sb_blocksize;
__fs32 sb_num_inodes;
__fs32 sb_free_inodes;
__fs32 sb_num_blocks;
__fs32 sb_free_blocks;
__u8 sb_spare1[4];
struct qnx6_root_node Inode;
struct qnx6_root_node Bitmap;
struct qnx6_root_node Longfile;
struct qnx6_root_node Unknown;
};

#endif