/*

   * Copyright (c) 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_EXPORT_H__
  #define __XFS_EXPORT_H__
  
  /*
   * Common defines for code related to exporting XFS filesystems over NFS.
   *
   * The NFS fileid goes out on the wire as an array of
   * 32bit unsigned ints in host order.  There are 5 possible
   * formats.
   *
   * (1)	fileid_type=0x00
   *	(no fileid data; handled by the generic code)
   *
   * (2)	fileid_type=0x01
   *	inode-num
   *	generation
   *
   * (3)	fileid_type=0x02
   *	inode-num
   *	generation
   *	parent-inode-num
   *	parent-generation
   *
   * (4)	fileid_type=0x81
   *	inode-num-lo32
   *	inode-num-hi32
   *	generation
   *
   * (5)	fileid_type=0x82
   *	inode-num-lo32
   *	inode-num-hi32
   *	generation
   *	parent-inode-num-lo32
   *	parent-inode-num-hi32
   *	parent-generation
   *
   * Note, the NFS filehandle also includes an fsid portion which
   * may have an inode number in it.  That number is hardcoded to
   * 32bits and there is no way for XFS to intercept it.  In

   * practice this means when exporting an XFS filesystem with 64bit

   * inodes you should either export the mountpoint (rather than
   * a subdirectory) or use the "fsid" export option.
   */

  struct xfs_fid64 {
  	u64 ino;
  	u32 gen;
  	u64 parent_ino;
  	u32 parent_gen;
  } __attribute__((packed));

  /* This flag goes on the wire.  Don't play with it. */
  #define XFS_FILEID_TYPE_64FLAG	0x80	/* NFS fileid has 64bit inodes */

  #endif	/* __XFS_EXPORT_H__ */