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 */
43 struct 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
62 struct 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
70 struct 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
81 struct 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
98 struct 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
105 struct qnx4_inode_info {
106 struct qnx4_inode_entry raw;
107 loff_t mmu_private;
108 struct inode vfs_inode;
109 };
110
111 extern struct inode *qnx4_iget(struct super_block *, unsigned long);
112 extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
113 extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
114 extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
115
116 extern struct buffer_head *qnx4_bread(struct inode *, int, int);
117
118 extern const struct inode_operations qnx4_file_inode_operations;
119 extern const struct inode_operations qnx4_dir_inode_operations;
120 extern const struct file_operations qnx4_file_operations;
121 extern const struct file_operations qnx4_dir_operations;
122 extern int qnx4_is_free(struct super_block *sb, long block);
123 extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
124 extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
125 extern void qnx4_truncate(struct inode *inode);
126 extern void qnx4_free_inode(struct inode *inode);
127 extern int qnx4_unlink(struct inode *dir, struct dentry *dentry);
128 extern int qnx4_rmdir(struct inode *dir, struct dentry *dentry);
129 extern int qnx4_sync_file(struct file *file, struct dentry *dentry, int);
130 extern int qnx4_sync_inode(struct inode *inode);
131
qnx4_sb(struct super_block * sb)132 static inline struct qnx4_sb_info *qnx4_sb(struct super_block *sb)
133 {
134 return sb->s_fs_info;
135 }
136
qnx4_i(struct inode * inode)137 static inline struct qnx4_inode_info *qnx4_i(struct inode *inode)
138 {
139 return container_of(inode, struct qnx4_inode_info, vfs_inode);
140 }
141
qnx4_raw_inode(struct inode * inode)142 static 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
150