1 #ifndef _LINUX_MINIX_FS_H
2 #define _LINUX_MINIX_FS_H
5 * The minix filesystem constants/structures
9 * Thanks to Kees J Bot for sending me the definitions of the new
10 * minix filesystem (aka V2) with bigger inodes and 32-bit block
14 #define MINIX_ROOT_INO 1
16 /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
17 #define MINIX_LINK_MAX 250
18 #define MINIX2_LINK_MAX 65530
20 #define MINIX_I_MAP_SLOTS 8
21 #define MINIX_Z_MAP_SLOTS 64
22 #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
23 #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
24 #define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
25 #define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
26 #define MINIX_VALID_FS 0x0001 /* Clean fs. */
27 #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
29 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
30 #define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
32 #define MINIX_V1 0x0001 /* original minix fs */
33 #define MINIX_V2 0x0002 /* minix V2 fs */
35 #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
38 * This is the original minix inode layout on disk.
39 * Note the 8-bit gid and atime and ctime.
52 * The new minix inode has all the time entries, as well as
53 * long block numbers and a third indirect block (7+1+1+1
54 * instead of 7+1+1). Also, some previously 8-bit values are
55 * now 16-bit. The inode is now 64 bytes instead of 32.
70 * minix super-block data on disk
72 struct minix_super_block {
77 __u16 s_firstdatazone;
78 __u16 s_log_zone_size;
85 struct minix_dir_entry {
93 * change the define below to 0 if you want names > info->s_namelen chars to be
94 * truncated. Else they will be disallowed (ENAMETOOLONG).
98 extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
99 extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
100 extern struct inode * minix_new_inode(const struct inode * dir, int * error);
101 extern void minix_free_inode(struct inode * inode);
102 extern unsigned long minix_count_free_inodes(struct super_block *sb);
103 extern int minix_new_block(struct inode * inode);
104 extern void minix_free_block(struct inode * inode, int block);
105 extern unsigned long minix_count_free_blocks(struct super_block *sb);
107 extern void V1_minix_truncate(struct inode *);
108 extern void V2_minix_truncate(struct inode *);
109 extern void minix_truncate(struct inode *);
110 extern int minix_sync_inode(struct inode *);
111 extern void minix_set_inode(struct inode *, dev_t);
112 extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
113 extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
115 extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
116 extern int minix_add_link(struct dentry*, struct inode*);
117 extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
118 extern int minix_make_empty(struct inode*, struct inode*);
119 extern int minix_empty_dir(struct inode*);
120 extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
121 extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
122 extern ino_t minix_inode_by_name(struct dentry*);
124 extern int minix_sync_file(struct file *, struct dentry *, int);
126 extern struct inode_operations minix_file_inode_operations;
127 extern struct inode_operations minix_dir_inode_operations;
128 extern struct file_operations minix_file_operations;
129 extern struct file_operations minix_dir_operations;
130 extern struct dentry_operations minix_dentry_operations;
132 #endif /* __KERNEL__ */