/*

   * Copyright (c) 2000-2006 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_RW_H__
  #define	__XFS_RW_H__
  
  struct xfs_buf;
  struct xfs_inode;
  struct xfs_mount;
  
  /*

   * Convert the given file system block to a disk block.
   * We have to treat it differently based on whether the
   * file is a real time file or not, because the bmap code
   * does.
   */

  static inline xfs_daddr_t
  xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
  {

  	return (XFS_IS_REALTIME_INODE(ip) ? \

  		 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \

  		 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
  }

  
  /*

   * Flags for xfs_free_eofblocks
   */
  #define XFS_FREE_EOF_LOCK	(1<<0)
  #define XFS_FREE_EOF_NOLOCK	(1<<1)

  
  /*
   * helper function to extract extent size hint from inode
   */
  STATIC_INLINE xfs_extlen_t
  xfs_get_extsz_hint(
  	xfs_inode_t	*ip)
  {
  	xfs_extlen_t	extsz;

  	if (unlikely(XFS_IS_REALTIME_INODE(ip))) {

  		extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
  				? ip->i_d.di_extsize
  				: ip->i_mount->m_sb.sb_rextsize;
  		ASSERT(extsz);
  	} else {
  		extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
  				? ip->i_d.di_extsize : 0;
  	}
  	return extsz;
  }

  /*

   * Prototypes for functions in xfs_rw.c.
   */

  extern int xfs_write_clear_setuid(struct xfs_inode *ip);

  extern int xfs_write_sync_logforce(struct xfs_mount *mp, struct xfs_inode *ip);

  extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
  extern int xfs_bioerror(struct xfs_buf *bp);
  extern int xfs_bioerror_relse(struct xfs_buf *bp);
  extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
  			xfs_daddr_t blkno, int len, uint flags,
  			struct xfs_buf **bpp);
  extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
  				xfs_buf_t *bp, xfs_daddr_t blkno);

  
  /*
   * Prototypes for functions in xfs_vnodeops.c.
   */

  extern int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip,
  			int flags);

  
  #endif /* __XFS_RW_H__ */