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
136