fs/xfs/xfs_imap.h

   1 /*
   2  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32 #ifndef __XFS_IMAP_H__
  33 #define __XFS_IMAP_H__
  34
  35 /*
  36  * This is the structure passed to xfs_imap() to map
  37  * an inode number to its on disk location.
  38  */
  39 typedef struct xfs_imap {
  40         xfs_daddr_t     im_blkno;       /* starting BB of inode chunk */
  41         uint            im_len;         /* length in BBs of inode chunk */
  42         xfs_agblock_t   im_agblkno;     /* logical block of inode chunk in ag */
  43         ushort          im_ioffset;     /* inode offset in block in "inodes" */
  44         ushort          im_boffset;     /* inode offset in block in bytes */
  45 } xfs_imap_t;
  46
  47 #ifdef __KERNEL__
  48 struct xfs_mount;
  49 struct xfs_trans;
  50 int     xfs_imap(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
  51                  xfs_imap_t *, uint);
  52 #endif
  53
  54 #endif  /* __XFS_IMAP_H__ */