/*
   *  linux/fs/hfs/hfs_fs.h
   *
   * Copyright (C) 1995-1997  Paul H. Hargrove
   * (C) 2003 Ardis Technologies <roman@ardistech.com>
   * This file may be distributed under the terms of the GNU General Public License.
   */
  
  #ifndef _LINUX_HFS_FS_H
  #define _LINUX_HFS_FS_H

  #include <linux/slab.h>
  #include <linux/types.h>
  #include <linux/buffer_head.h>
  #include <linux/fs.h>
  
  #include <asm/byteorder.h>
  #include <asm/uaccess.h>
  
  #include "hfs.h"
  
  #define DBG_BNODE_REFS	0x00000001
  #define DBG_BNODE_MOD	0x00000002
  #define DBG_CAT_MOD	0x00000004
  #define DBG_INODE	0x00000008
  #define DBG_SUPER	0x00000010
  #define DBG_EXTENT	0x00000020
  #define DBG_BITMAP	0x00000040
  
  //#define DBG_MASK	(DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
  //#define DBG_MASK	(DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
  //#define DBG_MASK	(DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
  #define DBG_MASK	(0)
  
  #define dprint(flg, fmt, args...) \
  	if (flg & DBG_MASK) printk(fmt , ## args)

  /*
   * struct hfs_inode_info
   *
   * The HFS-specific part of a Linux (struct inode)
   */
  struct hfs_inode_info {
  	atomic_t opencnt;
  
  	unsigned int flags;
  
  	/* to deal with localtime ugliness */
  	int tz_secondswest;
  
  	struct hfs_cat_key cat_key;
  
  	struct list_head open_dir_list;
  	struct inode *rsrc_inode;
  
  	struct semaphore extents_lock;
  
  	u16 alloc_blocks, clump_blocks;
  	sector_t fs_blocks;
  	/* Allocation extents from catlog record or volume header */
  	hfs_extent_rec first_extents;
  	u16 first_blocks;
  	hfs_extent_rec cached_extents;
  	u16 cached_start, cached_blocks;
  
  	loff_t phys_size;
  	struct inode vfs_inode;
  };
  
  #define HFS_FLG_RSRC		0x0001
  #define HFS_FLG_EXT_DIRTY	0x0002
  #define HFS_FLG_EXT_NEW		0x0004
  
  #define HFS_IS_RSRC(inode)	(HFS_I(inode)->flags & HFS_FLG_RSRC)
  
  /*
   * struct hfs_sb_info
   *
   * The HFS-specific part of a Linux (struct super_block)
   */
  struct hfs_sb_info {
  	struct buffer_head *mdb_bh;		/* The hfs_buffer
  						   holding the real
  						   superblock (aka VIB
  						   or MDB) */
  	struct hfs_mdb *mdb;
  	struct buffer_head *alt_mdb_bh;		/* The hfs_buffer holding
  						   the alternate superblock */
  	struct hfs_mdb *alt_mdb;
  	__be32 *bitmap;				/* The page holding the
  						   allocation bitmap */
  	struct hfs_btree *ext_tree;			/* Information about
  						   the extents b-tree */
  	struct hfs_btree *cat_tree;			/* Information about
  						   the catalog b-tree */
  	u32 file_count;				/* The number of
  						   regular files in
  						   the filesystem */
  	u32 folder_count;			/* The number of
  						   directories in the
  						   filesystem */
  	u32 next_id;				/* The next available
  						   file id number */
  	u32 clumpablks;				/* The number of allocation
  						   blocks to try to add when
  						   extending a file */
  	u32 fs_start;				/* The first 512-byte
  						   block represented
  						   in the bitmap */
  	u32 part_start;
  	u16 root_files;				/* The number of
  						   regular
  						   (non-directory)
  						   files in the root
  						   directory */
  	u16 root_dirs;				/* The number of
  						   directories in the
  						   root directory */
  	u16 fs_ablocks;				/* The number of
  						   allocation blocks
  						   in the filesystem */
  	u16 free_ablocks;			/* the number of unused
  						   allocation blocks
  						   in the filesystem */
  	u32 alloc_blksz;			/* The size of an
  						   "allocation block" */
  	int s_quiet;				/* Silent failure when
  						   changing owner or mode? */
  	__be32 s_type;				/* Type for new files */
  	__be32 s_creator;			/* Creator for new files */
  	umode_t s_file_umask;			/* The umask applied to the
  						   permissions on all files */
  	umode_t s_dir_umask;			/* The umask applied to the
  						   permissions on all dirs */
  	uid_t s_uid;				/* The uid of all files */
  	gid_t s_gid;				/* The gid of all files */
  
  	int session, part;

  	struct nls_table *nls_io, *nls_disk;

  	struct semaphore bitmap_lock;
  
  	unsigned long flags;
  
  	u16 blockoffset;
  
  	int fs_div;
  
  	struct hlist_head rsrc_inodes;
  };
  
  #define HFS_FLG_BITMAP_DIRTY	0
  #define HFS_FLG_MDB_DIRTY	1
  #define HFS_FLG_ALT_MDB_DIRTY	2
  
  /* bitmap.c */
  extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
  extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
  
  /* catalog.c */
  extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
  struct hfs_find_data;
  extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
  extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *);
  extern int hfs_cat_delete(u32, struct inode *, struct qstr *);
  extern int hfs_cat_move(u32, struct inode *, struct qstr *,
  			struct inode *, struct qstr *);

  extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *);

  
  /* dir.c */

  extern const struct file_operations hfs_dir_operations;

  extern const struct inode_operations hfs_dir_inode_operations;

  
  /* extent.c */
  extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
  extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
  extern void hfs_ext_write_extent(struct inode *);
  extern int hfs_extend_file(struct inode *);
  extern void hfs_file_truncate(struct inode *);
  
  extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
  
  /* inode.c */

  extern const struct address_space_operations hfs_aops;
  extern const struct address_space_operations hfs_btree_aops;

  
  extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int);
  extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
  extern int hfs_write_inode(struct inode *, int);
  extern int hfs_inode_setattr(struct dentry *, struct iattr *);
  extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
  			__be32 log_size, __be32 phys_size, u32 clump_size);
  extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
  extern void hfs_clear_inode(struct inode *);
  extern void hfs_delete_inode(struct inode *);
  
  /* attr.c */
  extern int hfs_setxattr(struct dentry *dentry, const char *name,
  			const void *value, size_t size, int flags);
  extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
  			    void *value, size_t size);
  extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
  
  /* mdb.c */
  extern int hfs_mdb_get(struct super_block *);
  extern void hfs_mdb_commit(struct super_block *);
  extern void hfs_mdb_close(struct super_block *);
  extern void hfs_mdb_put(struct super_block *);
  
  /* part_tbl.c */
  extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
  
  /* string.c */
  extern struct dentry_operations hfs_dentry_operations;
  
  extern int hfs_hash_dentry(struct dentry *, struct qstr *);
  extern int hfs_strcmp(const unsigned char *, unsigned int,
  		      const unsigned char *, unsigned int);
  extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
  
  /* trans.c */

  extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *);
  extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);

  
  extern struct timezone sys_tz;
  
  /*
   * There are two time systems.  Both are based on seconds since
   * a particular time/date.
   *	Unix:	unsigned lil-endian since 00:00 GMT, Jan. 1, 1970
   *	mac:	unsigned big-endian since 00:00 GMT, Jan. 1, 1904
   *
   */
  #define __hfs_u_to_mtime(sec)	cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
  #define __hfs_m_to_utime(sec)	(be32_to_cpu(sec) - 2082844800U  + sys_tz.tz_minuteswest * 60)
  
  #define HFS_I(inode)	(list_entry(inode, struct hfs_inode_info, vfs_inode))
  #define HFS_SB(sb)	((struct hfs_sb_info *)(sb)->s_fs_info)
  
  #define hfs_m_to_utime(time)	(struct timespec){ .tv_sec = __hfs_m_to_utime(time) }
  #define hfs_u_to_mtime(time)	__hfs_u_to_mtime((time).tv_sec)
  #define hfs_mtime()		__hfs_u_to_mtime(get_seconds())
  
  static inline const char *hfs_mdb_name(struct super_block *sb)
  {
  	return sb->s_id;
  }
  
  static inline void hfs_bitmap_dirty(struct super_block *sb)
  {
  	set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
  	sb->s_dirt = 1;
  }
  
  static inline void hfs_buffer_sync(struct buffer_head *bh)
  {
  	while (buffer_locked(bh)) {
  		wait_on_buffer(bh);
  	}
  	if (buffer_dirty(bh)) {
  		ll_rw_block(WRITE, 1, &bh);
  		wait_on_buffer(bh);
  	}
  }
  
  #define sb_bread512(sb, sec, data) ({			\
  	struct buffer_head *__bh;			\
  	sector_t __block;				\
  	loff_t __start;					\
  	int __offset;					\
  							\
  	__start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
  	__block = __start >> (sb)->s_blocksize_bits;	\
  	__offset = __start & ((sb)->s_blocksize - 1);	\
  	__bh = sb_bread((sb), __block);			\
  	if (likely(__bh != NULL))			\
  		data = (void *)(__bh->b_data + __offset);\
  	else						\
  		data = NULL;				\
  	__bh;						\
  })
  
  #endif