1 /*
2 * Name : qnx4_fs.h
3 * Author : Richard Frowijn
4 * Function : qnx4 global filesystem definitions
5 * Version : 1.0.2
6 * Last modified : 2000-01-31
7 *
8 * History : 23-03-1998 created
9 */
10 #ifndef _LINUX_QNX4_FS_H
11 #define _LINUX_QNX4_FS_H
12
13 #include <linux/qnxtypes.h>
14
15 #define QNX4_ROOT_INO 1
16
17 #define QNX4_MAX_XTNTS_PER_XBLK 60
18 /* for di_status */
19 #define QNX4_FILE_USED 0x01
20 #define QNX4_FILE_MODIFIED 0x02
21 #define QNX4_FILE_BUSY 0x04
22 #define QNX4_FILE_LINK 0x08
23 #define QNX4_FILE_INODE 0x10
24 #define QNX4_FILE_FSYSCLEAN 0x20
25
26 #define QNX4_I_MAP_SLOTS 8
27 #define QNX4_Z_MAP_SLOTS 64
28 #define QNX4_SUPER_MAGIC 0x002f /* qnx4 fs detection */
29 #define QNX4_VALID_FS 0x0001 /* Clean fs. */
30 #define QNX4_ERROR_FS 0x0002 /* fs has errors. */
31 #define QNX4_BLOCK_SIZE 0x200 /* blocksize of 512 bytes */
32 #define QNX4_BLOCK_SIZE_BITS 9 /* blocksize shift */
33 #define QNX4_DIR_ENTRY_SIZE 0x040 /* dir entry size of 64 bytes */
34 #define QNX4_DIR_ENTRY_SIZE_BITS 6 /* dir entry size shift */
35 #define QNX4_XBLK_ENTRY_SIZE 0x200 /* xblk entry size */
36 #define QNX4_INODES_PER_BLOCK 0x08 /* 512 / 64 */
37
38 /* for filenames */
39 #define QNX4_SHORT_NAME_MAX 16
40 #define QNX4_NAME_MAX 48
41
42 /*
43 * This is the original qnx4 inode layout on disk.
44 */
45 struct qnx4_inode_entry {
46 char di_fname[QNX4_SHORT_NAME_MAX];
47 qnx4_off_t di_size;
48 qnx4_xtnt_t di_first_xtnt;
49 __u32 di_xblk;
50 __s32 di_ftime;
51 __s32 di_mtime;
52 __s32 di_atime;
53 __s32 di_ctime;
54 qnx4_nxtnt_t di_num_xtnts;
55 qnx4_mode_t di_mode;
56 qnx4_muid_t di_uid;
57 qnx4_mgid_t di_gid;
58 qnx4_nlink_t di_nlink;
59 __u8 di_zero[4];
60 qnx4_ftype_t di_type;
61 __u8 di_status;
62 };
63
64 struct qnx4_link_info {
65 char dl_fname[QNX4_NAME_MAX];
66 __u32 dl_inode_blk;
67 __u8 dl_inode_ndx;
68 __u8 dl_spare[10];
69 __u8 dl_status;
70 };
71
72 struct qnx4_xblk {
73 __u32 xblk_next_xblk;
74 __u32 xblk_prev_xblk;
75 __u8 xblk_num_xtnts;
76 __u8 xblk_spare[3];
77 __s32 xblk_num_blocks;
78 qnx4_xtnt_t xblk_xtnts[QNX4_MAX_XTNTS_PER_XBLK];
79 char xblk_signature[8];
80 qnx4_xtnt_t xblk_first_xtnt;
81 };
82
83 struct qnx4_super_block {
84 struct qnx4_inode_entry RootDir;
85 struct qnx4_inode_entry Inode;
86 struct qnx4_inode_entry Boot;
87 struct qnx4_inode_entry AltBoot;
88 };
89
90 #ifdef __KERNEL__
91
92 #define QNX4_DEBUG 0
93
94 #if QNX4_DEBUG
95 #define QNX4DEBUG(X) printk X
96 #else
97 #define QNX4DEBUG(X) (void) 0
98 #endif
99
100 struct qnx4_sb_info {
101 struct buffer_head *sb_buf; /* superblock buffer */
102 struct qnx4_super_block *sb; /* our superblock */
103 unsigned int Version; /* may be useful */
104 struct qnx4_inode_entry *BitMap; /* useful */
105 };
106
107 struct qnx4_inode_info {
108 struct qnx4_inode_entry raw;
109 loff_t mmu_private;
110 struct inode vfs_inode;
111 };
112
113 extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
114 extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
115 extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
116
117 extern struct buffer_head *qnx4_getblk(struct inode *, int, int);
118 extern struct buffer_head *qnx4_bread(struct inode *, int, int);
119
120 extern struct inode_operations qnx4_file_inode_operations;
121 extern struct inode_operations qnx4_dir_inode_operations;
122 extern struct file_operations qnx4_file_operations;
123 extern struct file_operations qnx4_dir_operations;
124 extern int qnx4_is_free(struct super_block *sb, long block);
125 extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
126 extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
127 extern void qnx4_truncate(struct inode *inode);
128 extern void qnx4_free_inode(struct inode *inode);
129 extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
130 extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
131 extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
132 extern int qnx4_sync_inode(struct inode *inode);
133 extern int qnx4_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh, int create);
134
135 static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
136 {
137 return sb->s_fs_info;
138 }
139
140 static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
141 {
142 return container_of(inode, struct qnx4_inode_info, vfs_inode);
143 }
144
145 static inline struct qnx4_inode_entry *qnx4_raw_inode(struct inode *inode)
146 {
147 return &qnx4_i(inode)->raw;
148 }
149
150 #endif /* __KERNEL__ */
151
152 #endif
153
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