Subversion Repositories or1k

#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 MINIX2_LINK_MAX 65530

#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__

/*

 * change the define below to 0 if you want names > info->s_namelen chars to be

 * truncated. Else they will be disallowed (ENAMETOOLONG).

 */

#define NO_TRUNCATE 1

extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);

extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);

extern struct inode * minix_new_inode(const struct inode * dir, int * error);

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 inode * inode);

extern void minix_free_block(struct inode * inode, int block);

extern unsigned long minix_count_free_blocks(struct super_block *sb);

extern void V1_minix_truncate(struct inode *);

extern void V2_minix_truncate(struct inode *);

extern void minix_truncate(struct inode *);

extern int minix_sync_inode(struct inode *);

extern void minix_set_inode(struct inode *, dev_t);

extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);

extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);

extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);

extern int minix_add_link(struct dentry*, struct inode*);

extern int minix_delete_entry(struct minix_dir_entry*, struct page*);

extern int minix_make_empty(struct inode*, struct inode*);

extern int minix_empty_dir(struct inode*);

extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);

extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);

extern ino_t minix_inode_by_name(struct dentry*);

extern int minix_sync_file(struct file *, struct dentry *, int);

extern struct inode_operations minix_file_inode_operations;

extern struct inode_operations minix_dir_inode_operations;

extern struct file_operations minix_file_operations;

extern struct file_operations minix_dir_operations;

extern struct dentry_operations minix_dentry_operations;

#endif /* __KERNEL__ */

#endif