text: /*
   * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   * All Rights Reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it would be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write the Free Software Foundation,
   * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   */
  #ifndef __XFS_TYPES_H__
  #define	__XFS_TYPES_H__
  
  typedef __uint32_t	prid_t;		/* project ID */
  
  typedef __uint32_t	xfs_agblock_t;	/* blockno in alloc. group */
  typedef	__uint32_t	xfs_agino_t;	/* inode # within allocation grp */
  typedef	__uint32_t	xfs_extlen_t;	/* extent length in blocks */
  typedef	__uint32_t	xfs_agnumber_t;	/* allocation group number */
  typedef __int32_t	xfs_extnum_t;	/* # of extents in a file */
  typedef __int16_t	xfs_aextnum_t;	/* # extents in an attribute fork */
  typedef	__int64_t	xfs_fsize_t;	/* bytes in a file */
  typedef __uint64_t	xfs_ufsize_t;	/* unsigned bytes in a file */
  
  typedef	__int32_t	xfs_suminfo_t;	/* type of bitmap summary info */
  typedef	__int32_t	xfs_rtword_t;	/* word type for bitmap manipulations */
  
  typedef	__int64_t	xfs_lsn_t;	/* log sequence number */
  typedef	__int32_t	xfs_tid_t;	/* transaction identifier */
  
  typedef	__uint32_t	xfs_dablk_t;	/* dir/attr block number (in file) */
  typedef	__uint32_t	xfs_dahash_t;	/* dir/attr hash value */
  
  typedef	__uint64_t	xfs_fsblock_t;	/* blockno in filesystem (agno|agbno) */
  typedef __uint64_t	xfs_rfsblock_t;	/* blockno in filesystem (raw) */
  typedef __uint64_t	xfs_rtblock_t;	/* extent (block) in realtime area */
  typedef __uint64_t	xfs_fileoff_t;	/* block number in a file */
  typedef __uint64_t	xfs_filblks_t;	/* number of blocks in a file */
  
  typedef	__int64_t	xfs_srtblock_t;	/* signed version of xfs_rtblock_t */
  typedef __int64_t	xfs_sfiloff_t;	/* signed block number in a file */
  
  /*
   * Null values for the types.
   */
  #define	NULLFSBLOCK	((xfs_fsblock_t)-1)
  #define	NULLRFSBLOCK	((xfs_rfsblock_t)-1)
  #define	NULLRTBLOCK	((xfs_rtblock_t)-1)
  #define	NULLFILEOFF	((xfs_fileoff_t)-1)
  
  #define	NULLAGBLOCK	((xfs_agblock_t)-1)
  #define	NULLAGNUMBER	((xfs_agnumber_t)-1)
  #define	NULLEXTNUM	((xfs_extnum_t)-1)
  
  #define NULLCOMMITLSN	((xfs_lsn_t)-1)
  
  #define	NULLFSINO	((xfs_ino_t)-1)
  #define	NULLAGINO	((xfs_agino_t)-1)
  
  /*
   * Max values for extlen, extnum, aextnum.
   */
  #define	MAXEXTLEN	((xfs_extlen_t)0x001fffff)	/* 21 bits */
  #define	MAXEXTNUM	((xfs_extnum_t)0x7fffffff)	/* signed int */
  #define	MAXAEXTNUM	((xfs_aextnum_t)0x7fff)		/* signed short */
  
  /*
   * Minimum and maximum blocksize and sectorsize.
   * The blocksize upper limit is pretty much arbitrary.
   * The sectorsize upper limit is due to sizeof(sb_sectsize).
   */
  #define XFS_MIN_BLOCKSIZE_LOG	9	/* i.e. 512 bytes */
  #define XFS_MAX_BLOCKSIZE_LOG	16	/* i.e. 65536 bytes */
  #define XFS_MIN_BLOCKSIZE	(1 << XFS_MIN_BLOCKSIZE_LOG)
  #define XFS_MAX_BLOCKSIZE	(1 << XFS_MAX_BLOCKSIZE_LOG)
  #define XFS_MIN_SECTORSIZE_LOG	9	/* i.e. 512 bytes */
  #define XFS_MAX_SECTORSIZE_LOG	15	/* i.e. 32768 bytes */
  #define XFS_MIN_SECTORSIZE	(1 << XFS_MIN_SECTORSIZE_LOG)
  #define XFS_MAX_SECTORSIZE	(1 << XFS_MAX_SECTORSIZE_LOG)
  
  /*
   * Inode fork identifiers.
   */
  #define	XFS_DATA_FORK	0
  #define	XFS_ATTR_FORK	1
  
  /*
   * Min numbers of data/attr fork btree root pointers.
   */
  #define MINDBTPTRS	3
  #define MINABTPTRS	2
  
  /*
   * MAXNAMELEN is the length (including the terminating null) of
   * the longest permissible file (component) name.
   */
  #define MAXNAMELEN	256
  
  typedef enum {
  	XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
  } xfs_lookup_t;
  
  typedef enum {
  	XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi,
  	XFS_BTNUM_FINOi, XFS_BTNUM_MAX
  } xfs_btnum_t;
  
  struct xfs_name {
  	const unsigned char	*name;
  	int			len;
  	int			type;
  };
  
  /*
   * uid_t and gid_t are hard-coded to 32 bits in the inode.
   * Hence, an 'id' in a dquot is 32 bits..
   */
  typedef __uint32_t	xfs_dqid_t;
  
  /*
   * Constants for bit manipulations.
   */
  #define	XFS_NBBYLOG	3		/* log2(NBBY) */
  #define	XFS_WORDLOG	2		/* log2(sizeof(xfs_rtword_t)) */
  #define	XFS_NBWORDLOG	(XFS_NBBYLOG + XFS_WORDLOG)
  #define	XFS_NBWORD	(1 << XFS_NBWORDLOG)
  #define	XFS_WORDMASK	((1 << XFS_WORDLOG) - 1)
  
  
  #endif	/* __XFS_TYPES_H__ */
  