1#ifndef FS_MINIX_H
2#define FS_MINIX_H
3
4#include <linux/fs.h>
5#include <linux/pagemap.h>
6#include <linux/minix_fs.h>
7
8#define INODE_VERSION(inode)	minix_sb(inode->i_sb)->s_version
9#define MINIX_V1		0x0001		/* original minix fs */
10#define MINIX_V2		0x0002		/* minix V2 fs */
11#define MINIX_V3		0x0003		/* minix V3 fs */
12
13/*
14 * minix fs inode data in memory
15 */
16struct minix_inode_info {
17	union {
18		__u16 i1_data[16];
19		__u32 i2_data[16];
20	} u;
21	struct inode vfs_inode;
22};
23
24/*
25 * minix super-block data in memory
26 */
27struct minix_sb_info {
28	unsigned long s_ninodes;
29	unsigned long s_nzones;
30	unsigned long s_imap_blocks;
31	unsigned long s_zmap_blocks;
32	unsigned long s_firstdatazone;
33	unsigned long s_log_zone_size;
34	unsigned long s_max_size;
35	int s_dirsize;
36	int s_namelen;
37	int s_link_max;
38	struct buffer_head ** s_imap;
39	struct buffer_head ** s_zmap;
40	struct buffer_head * s_sbh;
41	struct minix_super_block * s_ms;
42	unsigned short s_mount_state;
43	unsigned short s_version;
44};
45
46extern struct inode *minix_iget(struct super_block *, unsigned long);
47extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
48extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
49extern struct inode * minix_new_inode(const struct inode *, int, int *);
50extern void minix_free_inode(struct inode * inode);
51extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
52extern int minix_new_block(struct inode * inode);
53extern void minix_free_block(struct inode *inode, unsigned long block);
54extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
55extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
56extern int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len);
57
58extern void V1_minix_truncate(struct inode *);
59extern void V2_minix_truncate(struct inode *);
60extern void minix_truncate(struct inode *);
61extern void minix_set_inode(struct inode *, dev_t);
62extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
63extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
64extern unsigned V1_minix_blocks(loff_t, struct super_block *);
65extern unsigned V2_minix_blocks(loff_t, struct super_block *);
66
67extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
68extern int minix_add_link(struct dentry*, struct inode*);
69extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
70extern int minix_make_empty(struct inode*, struct inode*);
71extern int minix_empty_dir(struct inode*);
72extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
73extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
74extern ino_t minix_inode_by_name(struct dentry*);
75
76extern const struct inode_operations minix_file_inode_operations;
77extern const struct inode_operations minix_dir_inode_operations;
78extern const struct file_operations minix_file_operations;
79extern const struct file_operations minix_dir_operations;
80
81static inline struct minix_sb_info *minix_sb(struct super_block *sb)
82{
83	return sb->s_fs_info;
84}
85
86static inline struct minix_inode_info *minix_i(struct inode *inode)
87{
88	return list_entry(inode, struct minix_inode_info, vfs_inode);
89}
90
91#endif /* FS_MINIX_H */
92