text: #ifndef _UFS_UFS_H
  #define _UFS_UFS_H 1
  
  #define UFS_MAX_GROUP_LOADED 8
  #define UFS_CGNO_EMPTY ((unsigned)-1)
  
  struct ufs_sb_private_info;
  struct ufs_cg_private_info;
  struct ufs_csum;
  
  struct ufs_sb_info {
  	struct ufs_sb_private_info * s_uspi;
  	struct ufs_csum	* s_csp;
  	unsigned s_bytesex;
  	unsigned s_flags;
  	struct buffer_head ** s_ucg;
  	struct ufs_cg_private_info * s_ucpi[UFS_MAX_GROUP_LOADED];
  	unsigned s_cgno[UFS_MAX_GROUP_LOADED];
  	unsigned short s_cg_loaded;
  	unsigned s_mount_opt;
  };
  
  struct ufs_inode_info {
  	union {
  		__fs32	i_data[15];
  		__u8	i_symlink[4*15];
  		__fs64	u2_i_data[15];
  	} i_u1;
  	__u32	i_flags;
  	__u32	i_shadow;
  	__u32	i_unused1;
  	__u32	i_unused2;
  	__u32	i_oeftflag;
  	__u16	i_osync;
  	__u64	i_lastfrag;
  	__u32   i_dir_start_lookup;
  	struct inode vfs_inode;
  };
  
  /* mount options */
  #define UFS_MOUNT_ONERROR		0x0000000F
  #define UFS_MOUNT_ONERROR_PANIC		0x00000001
  #define UFS_MOUNT_ONERROR_LOCK		0x00000002
  #define UFS_MOUNT_ONERROR_UMOUNT	0x00000004
  #define UFS_MOUNT_ONERROR_REPAIR	0x00000008
  
  #define UFS_MOUNT_UFSTYPE		0x0000FFF0
  #define UFS_MOUNT_UFSTYPE_OLD		0x00000010
  #define UFS_MOUNT_UFSTYPE_44BSD		0x00000020
  #define UFS_MOUNT_UFSTYPE_SUN		0x00000040
  #define UFS_MOUNT_UFSTYPE_NEXTSTEP	0x00000080
  #define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD	0x00000100
  #define UFS_MOUNT_UFSTYPE_OPENSTEP	0x00000200
  #define UFS_MOUNT_UFSTYPE_SUNx86	0x00000400
  #define UFS_MOUNT_UFSTYPE_HP	        0x00000800
  #define UFS_MOUNT_UFSTYPE_UFS2		0x00001000
  #define UFS_MOUNT_UFSTYPE_SUNOS		0x00002000
  
  #define ufs_clear_opt(o,opt)	o &= ~UFS_MOUNT_##opt
  #define ufs_set_opt(o,opt)	o |= UFS_MOUNT_##opt
  #define ufs_test_opt(o,opt)	((o) & UFS_MOUNT_##opt)
  
  /*
   * Debug code
   */
  #ifdef CONFIG_UFS_DEBUG
  #	define UFSD(f, a...)	{					\
  		printk ("UFSD (%s, %d): %s:",				\
  			__FILE__, __LINE__, __func__);		\
  		printk (f, ## a);					\
  	}
  #else
  #	define UFSD(f, a...)	/**/
  #endif
  
  /* balloc.c */
  extern void ufs_free_fragments (struct inode *, u64, unsigned);
  extern void ufs_free_blocks (struct inode *, u64, unsigned);
  extern u64 ufs_new_fragments(struct inode *, void *, u64, u64,
  			     unsigned, int *, struct page *);
  
  /* cylinder.c */
  extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
  extern void ufs_put_cylinder (struct super_block *, unsigned);
  
  /* dir.c */
  extern const struct inode_operations ufs_dir_inode_operations;
  extern int ufs_add_link (struct dentry *, struct inode *);
  extern ino_t ufs_inode_by_name(struct inode *, struct dentry *);
  extern int ufs_make_empty(struct inode *, struct inode *);
  extern struct ufs_dir_entry *ufs_find_entry(struct inode *, struct dentry *, struct page **);
  extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
  extern int ufs_empty_dir (struct inode *);
  extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
  extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
  			 struct page *page, struct inode *inode);
  
  /* file.c */
  extern const struct inode_operations ufs_file_inode_operations;
  extern const struct file_operations ufs_file_operations;
  
  extern const struct address_space_operations ufs_aops;
  
  /* ialloc.c */
  extern void ufs_free_inode (struct inode *inode);
  extern struct inode * ufs_new_inode (struct inode *, int);
  
  /* inode.c */
  extern struct inode *ufs_iget(struct super_block *, unsigned long);
  extern int ufs_write_inode (struct inode *, int);
  extern int ufs_sync_inode (struct inode *);
  extern void ufs_delete_inode (struct inode *);
  extern struct buffer_head * ufs_bread (struct inode *, unsigned, int, int *);
  extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);
  
  /* namei.c */
  extern const struct file_operations ufs_dir_operations;
  
  /* super.c */
  extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
  extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
  extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
  
  /* symlink.c */
  extern const struct inode_operations ufs_fast_symlink_inode_operations;
  
  /* truncate.c */
  extern int ufs_truncate (struct inode *, loff_t);
  
  static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
  {
  	return sb->s_fs_info;
  }
  
  static inline struct ufs_inode_info *UFS_I(struct inode *inode)
  {
  	return container_of(inode, struct ufs_inode_info, vfs_inode);
  }
  
  /*
   * Give cylinder group number for a file system block.
   * Give cylinder group block number for a file system block.
   */
  /* #define	ufs_dtog(d)	((d) / uspi->s_fpg) */
  static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
  {
  	do_div(b, uspi->s_fpg);
  	return b;
  }
  /* #define	ufs_dtogd(d)	((d) % uspi->s_fpg) */
  static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
  {
  	return do_div(b, uspi->s_fpg);
  }
  
  #endif /* _UFS_UFS_H */
  