minix_fs.h

Util-linux 软件包包含许多工具。其中比较重要的是加载、卸载、格式化、分区和管理硬盘驱动器

#ifndef _LINUX_MINIX_FS_H
#define _LINUX_MINIX_FS_H

/*
 * The minix filesystem constants/structures
 */

/*
 * Thanks to Kees J Bot for sending me the definitions of the new
 * minix filesystem (aka V2) with bigger inodes and 32-bit block
 * pointers.
 */

#define MINIX_ROOT_INO 1

/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
#define MINIX_LINK_MAX	250

#define MINIX_I_MAP_SLOTS	8
#define MINIX_Z_MAP_SLOTS	64
#define MINIX_SUPER_MAGIC	0x137F		/* original minix fs */
#define MINIX_SUPER_MAGIC2	0x138F		/* minix fs, 30 char names */
#define MINIX2_SUPER_MAGIC	0x2468		/* minix V2 fs */
#define MINIX2_SUPER_MAGIC2	0x2478		/* minix V2 fs, 30 char names */
#define MINIX_VALID_FS		0x0001		/* Clean fs. */
#define MINIX_ERROR_FS		0x0002		/* fs has errors. */

#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))

#define MINIX_V1		0x0001		/* original minix fs */
#define MINIX_V2		0x0002		/* minix V2 fs */

#define INODE_VERSION(inode)	inode->i_sb->u.minix_sb.s_version

/*
 * This is the original minix inode layout on disk.
 * Note the 8-bit gid and atime and ctime.
 */
struct minix_inode {
	__u16 i_mode;
	__u16 i_uid;
	__u32 i_size;
	__u32 i_time;
	__u8  i_gid;
	__u8  i_nlinks;
	__u16 i_zone[9];
};

/*
 * The new minix inode has all the time entries, as well as
 * long block numbers and a third indirect block (7+1+1+1
 * instead of 7+1+1). Also, some previously 8-bit values are
 * now 16-bit. The inode is now 64 bytes instead of 32.
 */
struct minix2_inode {
	__u16 i_mode;
	__u16 i_nlinks;
	__u16 i_uid;
	__u16 i_gid;
	__u32 i_size;
	__u32 i_atime;
	__u32 i_mtime;
	__u32 i_ctime;
	__u32 i_zone[10];
};

/*
 * minix super-block data on disk
 */
struct minix_super_block {
	__u16 s_ninodes;
	__u16 s_nzones;
	__u16 s_imap_blocks;
	__u16 s_zmap_blocks;
	__u16 s_firstdatazone;
	__u16 s_log_zone_size;
	__u32 s_max_size;
	__u16 s_magic;
	__u16 s_state;
	__u32 s_zones;
};

struct minix_dir_entry {
	__u16 inode;
	char name[0];
};

#ifdef __KERNEL__

extern int minix_lookup(struct inode * dir,const char * name, int len,
                        struct inode ** result);
extern int minix_create(struct inode * dir,const char * name, int len, int mode,
	struct inode ** result);
extern int minix_mkdir(struct inode * dir, const char * name, int len, int mode);
extern int minix_rmdir(struct inode * dir, const char * name, int len);
extern int minix_unlink(struct inode * dir, const char * name, int len);
extern int minix_symlink(struct inode * inode, const char * name, int len,
	const char * symname);
extern int minix_link(struct inode * oldinode, struct inode * dir, const char * name, int len);
extern int minix_mknod(struct inode * dir, const char * name, int len, int mode, int rdev);
extern int minix_rename(struct inode * old_dir, const char * old_name, int old_len,
	struct inode * new_dir, const char * new_name, int new_len, int must_be_dir);
extern struct inode * minix_new_inode(const struct inode * dir);
extern void minix_free_inode(struct inode * inode);
extern unsigned long minix_count_free_inodes(struct super_block *sb);
extern int minix_new_block(struct super_block * sb);
extern void minix_free_block(struct super_block * sb, int block);
extern unsigned long minix_count_free_blocks(struct super_block *sb);

extern int minix_bmap(struct inode *,int);

extern struct buffer_head * minix_getblk(struct inode *, int, int);
extern struct buffer_head * minix_bread(struct inode *, int, int);

extern void minix_truncate(struct inode *);
extern void minix_put_super(struct super_block *);
extern struct super_block *minix_read_super(struct super_block *,void *,int);
extern int init_minix_fs(void);
extern void minix_write_super(struct super_block *);
extern int minix_remount (struct super_block * sb, int * flags, char * data);
extern void minix_read_inode(struct inode *);
extern void minix_write_inode(struct inode *);
extern void minix_put_inode(struct inode *);
extern void minix_statfs(struct super_block *, struct statfs *, int);
extern int minix_sync_inode(struct inode *);
extern int minix_sync_file(struct inode *, struct file *);

extern struct inode_operations minix_file_inode_operations;
extern struct inode_operations minix_dir_inode_operations;
extern struct inode_operations minix_symlink_inode_operations;

#endif /* __KERNEL__ */

#endif