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1/*
2 * Name : qnx4_fs.h
3 * Author : Richard Frowijn
4 * Function : qnx4 global filesystem definitions
5 * History : 23-03-1998 created
6 */
7#ifndef _LINUX_QNX4_FS_H
8#define _LINUX_QNX4_FS_H
9
10#include <linux/types.h>
11#include <linux/qnxtypes.h>
12#include <linux/magic.h>
13
14#define QNX4_ROOT_INO 1
15
16#define QNX4_MAX_XTNTS_PER_XBLK 60
17/* for di_status */
18#define QNX4_FILE_USED 0x01
19#define QNX4_FILE_MODIFIED 0x02
20#define QNX4_FILE_BUSY 0x04
21#define QNX4_FILE_LINK 0x08
22#define QNX4_FILE_INODE 0x10
23#define QNX4_FILE_FSYSCLEAN 0x20
24
25#define QNX4_I_MAP_SLOTS 8
26#define QNX4_Z_MAP_SLOTS 64
27#define QNX4_VALID_FS 0x0001 /* Clean fs. */
28#define QNX4_ERROR_FS 0x0002 /* fs has errors. */
29#define QNX4_BLOCK_SIZE 0x200 /* blocksize of 512 bytes */
30#define QNX4_BLOCK_SIZE_BITS 9 /* blocksize shift */
31#define QNX4_DIR_ENTRY_SIZE 0x040 /* dir entry size of 64 bytes */
32#define QNX4_DIR_ENTRY_SIZE_BITS 6 /* dir entry size shift */
33#define QNX4_XBLK_ENTRY_SIZE 0x200 /* xblk entry size */
34#define QNX4_INODES_PER_BLOCK 0x08 /* 512 / 64 */
35
36/* for filenames */
37#define QNX4_SHORT_NAME_MAX 16
38#define QNX4_NAME_MAX 48
39
40/*
41 * This is the original qnx4 inode layout on disk.
42 */
43struct qnx4_inode_entry {
44 char di_fname[QNX4_SHORT_NAME_MAX];
45 qnx4_off_t di_size;
46 qnx4_xtnt_t di_first_xtnt;
47 __le32 di_xblk;
48 __le32 di_ftime;
49 __le32 di_mtime;
50 __le32 di_atime;
51 __le32 di_ctime;
52 qnx4_nxtnt_t di_num_xtnts;
53 qnx4_mode_t di_mode;
54 qnx4_muid_t di_uid;
55 qnx4_mgid_t di_gid;
56 qnx4_nlink_t di_nlink;
57 __u8 di_zero[4];
58 qnx4_ftype_t di_type;
59 __u8 di_status;
60};
61
62struct qnx4_link_info {
63 char dl_fname[QNX4_NAME_MAX];
64 __le32 dl_inode_blk;
65 __u8 dl_inode_ndx;
66 __u8 dl_spare[10];
67 __u8 dl_status;
68};
69
70struct qnx4_xblk {
71 __le32 xblk_next_xblk;
72 __le32 xblk_prev_xblk;
73 __u8 xblk_num_xtnts;
74 __u8 xblk_spare[3];
75 __le32 xblk_num_blocks;
76 qnx4_xtnt_t xblk_xtnts[QNX4_MAX_XTNTS_PER_XBLK];
77 char xblk_signature[8];
78 qnx4_xtnt_t xblk_first_xtnt;
79};
80
81struct qnx4_super_block {
82 struct qnx4_inode_entry RootDir;
83 struct qnx4_inode_entry Inode;
84 struct qnx4_inode_entry Boot;
85 struct qnx4_inode_entry AltBoot;
86};
87
88#ifdef __KERNEL__
89
90#define QNX4_DEBUG 0
91
92#if QNX4_DEBUG
93#define QNX4DEBUG(X) printk X
94#else
95#define QNX4DEBUG(X) (void) 0
96#endif
97
98struct qnx4_sb_info {
99 struct buffer_head *sb_buf; /* superblock buffer */
100 struct qnx4_super_block *sb; /* our superblock */
101 unsigned int Version; /* may be useful */
102 struct qnx4_inode_entry *BitMap; /* useful */
103};
104
105struct qnx4_inode_info {
106 struct qnx4_inode_entry raw;
107 loff_t mmu_private;
108 struct inode vfs_inode;
109};
110
111extern struct inode *qnx4_iget(struct super_block *, unsigned long);
112extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
113extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
114extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
115
116extern struct buffer_head *qnx4_bread(struct inode *, int, int);
117
118extern const struct inode_operations qnx4_file_inode_operations;
119extern const struct inode_operations qnx4_dir_inode_operations;
120extern const struct file_operations qnx4_file_operations;
121extern const struct file_operations qnx4_dir_operations;
122extern int qnx4_is_free(struct super_block *sb, long block);
123extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
124extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
125extern void qnx4_truncate(struct inode *inode);
126extern void qnx4_free_inode(struct inode *inode);
127extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
128extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
129extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
130extern int qnx4_sync_inode(struct inode *inode);
131
132static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
133{
134 return sb->s_fs_info;
135}
136
137static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
138{
139 return container_of(inode, struct qnx4_inode_info, vfs_inode);
140}
141
142static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
143{
144 return &qnx4_i(inode)->raw;
145}
146
147#endif /* __KERNEL__ */
148
149#endif