/*

   *   Copyright (C) International Business Machines Corp., 2000-2001

   *
   *   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; either version 2 of the License, or

   *   (at your option) any later version.

   *

   *   This program is distributed in the hope that it will 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 to the Free Software

   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   */
  #ifndef _H_JFS_DINODE
  #define _H_JFS_DINODE
  
  /*

   *	jfs_dinode.h: on-disk inode manager

   */

  #define INODESLOTSIZE		128
  #define L2INODESLOTSIZE		7
  #define log2INODESIZE		9	/* log2(bytes per dinode) */

  
  
  /*

   *	on-disk inode : 512 bytes

   *
   * note: align 64-bit fields on 8-byte boundary.
   */
  struct dinode {
  	/*

  	 *	I. base area (128 bytes)
  	 *	------------------------

  	 *
  	 * define generic/POSIX attributes
  	 */
  	__le32 di_inostamp;	/* 4: stamp to show inode belongs to fileset */
  	__le32 di_fileset;	/* 4: fileset number */
  	__le32 di_number;	/* 4: inode number, aka file serial number */
  	__le32 di_gen;		/* 4: inode generation number */
  
  	pxd_t di_ixpxd;		/* 8: inode extent descriptor */
  
  	__le64 di_size;		/* 8: size */
  	__le64 di_nblocks;	/* 8: number of blocks allocated */
  
  	__le32 di_nlink;	/* 4: number of links to the object */
  
  	__le32 di_uid;		/* 4: user id of owner */
  	__le32 di_gid;		/* 4: group id of owner */
  
  	__le32 di_mode;		/* 4: attribute, format and permission */
  
  	struct timestruc_t di_atime;	/* 8: time last data accessed */
  	struct timestruc_t di_ctime;	/* 8: time last status changed */
  	struct timestruc_t di_mtime;	/* 8: time last data modified */
  	struct timestruc_t di_otime;	/* 8: time created */
  
  	dxd_t di_acl;		/* 16: acl descriptor */
  
  	dxd_t di_ea;		/* 16: ea descriptor */
  
  	__le32 di_next_index;	/* 4: Next available dir_table index */
  
  	__le32 di_acltype;	/* 4: Type of ACL */
  
  	/*

  	 *	Extension Areas.

  	 *

  	 *	Historically, the inode was partitioned into 4 128-byte areas,
  	 *	the last 3 being defined as unions which could have multiple
  	 *	uses.  The first 96 bytes had been completely unused until
  	 *	an index table was added to the directory.  It is now more
  	 *	useful to describe the last 3/4 of the inode as a single
  	 *	union.  We would probably be better off redesigning the
  	 *	entire structure from scratch, but we don't want to break
  	 *	commonality with OS/2's JFS at this time.

  	 */
  	union {
  		struct {
  			/*
  			 * This table contains the information needed to
  			 * find a directory entry from a 32-bit index.
  			 * If the index is small enough, the table is inline,
  			 * otherwise, an x-tree root overlays this table
  			 */
  			struct dir_table_slot _table[12]; /* 96: inline */
  
  			dtroot_t _dtroot;		/* 288: dtree root */
  		} _dir;					/* (384) */
  #define di_dirtable	u._dir._table
  #define di_dtroot	u._dir._dtroot

  #define di_parent	di_dtroot.header.idotdot

  #define di_DASD		di_dtroot.header.DASD
  
  		struct {
  			union {
  				u8 _data[96];		/* 96: unused */
  				struct {
  					void *_imap;	/* 4: unused */
  					__le32 _gengen;	/* 4: generator */
  				} _imap;
  			} _u1;				/* 96: */
  #define di_gengen	u._file._u1._imap._gengen
  
  			union {
  				xtpage_t _xtroot;
  				struct {
  					u8 unused[16];	/* 16: */
  					dxd_t _dxd;	/* 16: */
  					union {
  						__le32 _rdev;	/* 4: */
  						u8 _fastsymlink[128];
  					} _u;
  					u8 _inlineea[128];
  				} _special;
  			} _u2;
  		} _file;
  #define di_xtroot	u._file._u2._xtroot
  #define di_dxd		u._file._u2._special._dxd
  #define di_btroot	di_xtroot
  #define di_inlinedata	u._file._u2._special._u
  #define di_rdev		u._file._u2._special._u._rdev
  #define di_fastsymlink	u._file._u2._special._u._fastsymlink

  #define di_inlineea	u._file._u2._special._inlineea

  	} u;
  };
  
  /* extended mode bits (on-disk inode di_mode) */

  #define IFJOURNAL	0x00010000	/* journalled file */
  #define ISPARSE		0x00020000	/* sparse file enabled */
  #define INLINEEA	0x00040000	/* inline EA area free */

  #define ISWAPFILE	0x00800000	/* file open for pager swap space */
  
  /* more extended mode bits: attributes for OS/2 */
  #define IREADONLY	0x02000000	/* no write access to file */

  #define IHIDDEN		0x04000000	/* hidden file */

  #define ISYSTEM		0x08000000	/* system file */

  #define IDIRECTORY	0x20000000	/* directory (shadow of real bit) */

  #define IARCHIVE	0x40000000	/* file archive bit */
  #define INEWNAME	0x80000000	/* non-8.3 filename format */
  
  #define IRASH		0x4E000000	/* mask for changeable attributes */

  #define ATTRSHIFT	25	/* bits to shift to move attribute
  				   specification to mode position */

  /* extended attributes for Linux */
  
  #define JFS_NOATIME_FL		0x00080000 /* do not update atime */
  
  #define JFS_DIRSYNC_FL		0x00100000 /* dirsync behaviour */
  #define JFS_SYNC_FL		0x00200000 /* Synchronous updates */
  #define JFS_SECRM_FL		0x00400000 /* Secure deletion */
  #define JFS_UNRM_FL		0x00800000 /* allow for undelete */
  
  #define JFS_APPEND_FL		0x01000000 /* writes to file may only append */
  #define JFS_IMMUTABLE_FL	0x02000000 /* Immutable file */
  
  #define JFS_FL_USER_VISIBLE	0x03F80000
  #define JFS_FL_USER_MODIFIABLE	0x03F80000
  #define JFS_FL_INHERIT		0x03C80000
  
  /* These are identical to EXT[23]_IOC_GETFLAGS/SETFLAGS */
  #define JFS_IOC_GETFLAGS	_IOR('f', 1, long)
  #define JFS_IOC_SETFLAGS	_IOW('f', 2, long)

  #define JFS_IOC_GETFLAGS32	_IOR('f', 1, int)
  #define JFS_IOC_SETFLAGS32	_IOW('f', 2, int)

  #endif /*_H_JFS_DINODE */