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 */
16 struct 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 */
27 struct 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
46 extern struct inode *minix_iget(struct super_block *, unsigned long);
47 extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
48 extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
49 extern struct inode * minix_new_inode(const struct inode * dir, int * error);
50 extern void minix_free_inode(struct inode * inode);
51 extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
52 extern int minix_new_block(struct inode * inode);
53 extern void minix_free_block(struct inode *inode, unsigned long block);
54 extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
55 extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
56 extern int __minix_write_begin(struct file *file, struct address_space *mapping,
57 loff_t pos, unsigned len, unsigned flags,
58 struct page **pagep, void **fsdata);
59
60 extern void V1_minix_truncate(struct inode *);
61 extern void V2_minix_truncate(struct inode *);
62 extern void minix_truncate(struct inode *);
63 extern void minix_set_inode(struct inode *, dev_t);
64 extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
65 extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
66 extern unsigned V1_minix_blocks(loff_t, struct super_block *);
67 extern unsigned V2_minix_blocks(loff_t, struct super_block *);
68
69 extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
70 extern int minix_add_link(struct dentry*, struct inode*);
71 extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
72 extern int minix_make_empty(struct inode*, struct inode*);
73 extern int minix_empty_dir(struct inode*);
74 extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
75 extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
76 extern ino_t minix_inode_by_name(struct dentry*);
77
78 extern const struct inode_operations minix_file_inode_operations;
79 extern const struct inode_operations minix_dir_inode_operations;
80 extern const struct file_operations minix_file_operations;
81 extern const struct file_operations minix_dir_operations;
82
83 static inline struct minix_sb_info *minix_sb(struct super_block *sb)
84 {
85 return sb->s_fs_info;
86 }
87
88 static inline struct minix_inode_info *minix_i(struct inode *inode)
89 {
90 return list_entry(inode, struct minix_inode_info, vfs_inode);
91 }
92
93 #endif /* FS_MINIX_H */
94
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