qnx6_fs.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 *  Name                 : qnx6_fs.h
  4 *  Author               : Kai Bankett
  5 *  Function             : qnx6 global filesystem definitions
  6 *  History              : 17-01-2012 created
  7 */
  8#ifndef _LINUX_QNX6_FS_H
  9#define _LINUX_QNX6_FS_H
 10
 11#include <linux/types.h>
 12#include <linux/magic.h>
 13
 14#define QNX6_ROOT_INO 1
 15
 16/* for di_status */
 17#define QNX6_FILE_DIRECTORY	0x01
 18#define QNX6_FILE_DELETED	0x02
 19#define QNX6_FILE_NORMAL	0x03
 20
 21#define QNX6_SUPERBLOCK_SIZE	0x200	/* superblock always is 512 bytes */
 22#define QNX6_SUPERBLOCK_AREA	0x1000	/* area reserved for superblock */
 23#define	QNX6_BOOTBLOCK_SIZE	0x2000	/* heading bootblock area */
 24#define QNX6_DIR_ENTRY_SIZE	0x20	/* dir entry size of 32 bytes */
 25#define QNX6_INODE_SIZE		0x80	/* each inode is 128 bytes */
 26#define QNX6_INODE_SIZE_BITS	7	/* inode entry size shift */
 27
 28#define QNX6_NO_DIRECT_POINTERS	16	/* 16 blockptrs in sbl/inode */
 29#define QNX6_PTR_MAX_LEVELS	5	/* maximum indirect levels */
 30
 31/* for filenames */
 32#define QNX6_SHORT_NAME_MAX	27
 33#define QNX6_LONG_NAME_MAX	510
 34
 35/* list of mount options */
 36#define QNX6_MOUNT_MMI_FS	0x010000 /* mount as Audi MMI 3G fs */
 37
 38/*
 39 * This is the original qnx6 inode layout on disk.
 40 * Each inode is 128 byte long.
 41 */
 42struct qnx6_inode_entry {
 43	__fs64		di_size;
 44	__fs32		di_uid;
 45	__fs32		di_gid;
 46	__fs32		di_ftime;
 47	__fs32		di_mtime;
 48	__fs32		di_atime;
 49	__fs32		di_ctime;
 50	__fs16		di_mode;
 51	__fs16		di_ext_mode;
 52	__fs32		di_block_ptr[QNX6_NO_DIRECT_POINTERS];
 53	__u8		di_filelevels;
 54	__u8		di_status;
 55	__u8		di_unknown2[2];
 56	__fs32		di_zero2[6];
 57};
 58
 59/*
 60 * Each directory entry is maximum 32 bytes long.
 61 * If more characters or special characters required it is stored
 62 * in the longfilenames structure.
 63 */
 64struct qnx6_dir_entry {
 65	__fs32		de_inode;
 66	__u8		de_size;
 67	char		de_fname[QNX6_SHORT_NAME_MAX];
 68};
 69
 70/*
 71 * Longfilename direntries have a different structure
 72 */
 73struct qnx6_long_dir_entry {
 74	__fs32		de_inode;
 75	__u8		de_size;
 76	__u8		de_unknown[3];
 77	__fs32		de_long_inode;
 78	__fs32		de_checksum;
 79};
 80
 81struct qnx6_long_filename {
 82	__fs16		lf_size;
 83	__u8		lf_fname[QNX6_LONG_NAME_MAX];
 84};
 85
 86struct qnx6_root_node {
 87	__fs64		size;
 88	__fs32		ptr[QNX6_NO_DIRECT_POINTERS];
 89	__u8		levels;
 90	__u8		mode;
 91	__u8		spare[6];
 92};
 93
 94struct qnx6_super_block {
 95	__fs32		sb_magic;
 96	__fs32		sb_checksum;
 97	__fs64		sb_serial;
 98	__fs32		sb_ctime;	/* time the fs was created */
 99	__fs32		sb_atime;	/* last access time */
100	__fs32		sb_flags;
101	__fs16		sb_version1;	/* filesystem version information */
102	__fs16		sb_version2;	/* filesystem version information */
103	__u8		sb_volumeid[16];
104	__fs32		sb_blocksize;
105	__fs32		sb_num_inodes;
106	__fs32		sb_free_inodes;
107	__fs32		sb_num_blocks;
108	__fs32		sb_free_blocks;
109	__fs32		sb_allocgroup;
110	struct qnx6_root_node Inode;
111	struct qnx6_root_node Bitmap;
112	struct qnx6_root_node Longfile;
113	struct qnx6_root_node Unknown;
114};
115
116/* Audi MMI 3G superblock layout is different to plain qnx6 */
117struct qnx6_mmi_super_block {
118	__fs32		sb_magic;
119	__fs32		sb_checksum;
120	__fs64		sb_serial;
121	__u8		sb_spare0[12];
122	__u8		sb_id[12];
123	__fs32		sb_blocksize;
124	__fs32		sb_num_inodes;
125	__fs32		sb_free_inodes;
126	__fs32		sb_num_blocks;
127	__fs32		sb_free_blocks;
128	__u8		sb_spare1[4];
129	struct qnx6_root_node Inode;
130	struct qnx6_root_node Bitmap;
131	struct qnx6_root_node Longfile;
132	struct qnx6_root_node Unknown;
133};
134
135#endif