minix_fs.h

早期linux0.95内核的源代码

/*
 * The minix filesystem constants/structures
 */

#ifndef _MINIX_FS_H
#define _MINIX_FS_H

#include <sys/types.h>

#define MINIX_NAME_LEN 14
#define MINIX_ROOT_INO 1

#define MINIX_I_MAP_SLOTS 8
#define MINIX_Z_MAP_SLOTS 8
#define MINIX_SUPER_MAGIC 0x137F

#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
#define MINIX_DIR_ENTRIES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_dir_entry)))

struct minix_inode {
	unsigned short i_mode;
	unsigned short i_uid;
	unsigned long i_size;
	unsigned long i_time;
	unsigned char i_gid;
	unsigned char i_nlinks;
	unsigned short i_zone[9];
};

struct minix_super_block {
	unsigned short s_ninodes;
	unsigned short s_nzones;
	unsigned short s_imap_blocks;
	unsigned short s_zmap_blocks;
	unsigned short s_firstdatazone;
	unsigned short s_log_zone_size;
	unsigned long s_max_size;
	unsigned short s_magic;
};

struct minix_dir_entry {
	unsigned short inode;
	char name[MINIX_NAME_LEN];
};

extern int minix_open(struct inode * inode, struct file * filp);
extern void minix_release(struct inode * inode, struct file * filp);
extern struct inode * minix_follow_link(struct inode * dir, struct inode * inode);
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);
extern int minix_readlink(struct inode * inode, char * buffer, int buflen);
extern struct inode * minix_new_inode(int dev);
extern void minix_free_inode(struct inode * inode);
extern int minix_new_block(int dev);
extern int minix_free_block(int dev, int block);

extern int minix_create_block(struct inode * inode, int block);
extern int minix_bmap(struct inode * inode,int block);

extern int minix_lseek(struct inode * inode, struct file * filp, off_t offset, int origin);
extern int minix_read(struct inode * inode, struct file * filp, char * buf, int count);
extern int minix_write(struct inode * inode, struct file * filp, char * buf, int count);

extern struct inode_operations minix_inode_operations;
extern struct file_operations minix_file_operations;

#endif