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Added prototype.

/*
 * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 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.
 * 
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 * 
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 * 
 * http://www.sgi.com 
 * 
 * For further information regarding this notice, see: 
 * 
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */
/*
 *
 * $Header: /ptools/plroot/slinx/2.4.0-test1-xfs/.RCS/PL/linux/fs/xfs/linux/RCS/xfs_lrw.h,v 1.10 2000/06/09 06:40:03 ananth Exp $
 * $Author: ananth $
 * $Id: xfs_lrw.h,v 1.10 2000/06/09 06:40:03 ananth Exp $
 *
 */

#ifndef _XFS_LRW_H
#define _XFS_LRW_H

#define XFS_IOMAP_READ_ENTER	3
/*
 * Maximum count of bmaps used by read and write paths.
 */
#define	XFS_MAX_RW_NBMAPS	4

extern int xfs_bmap(bhv_desc_t *,loff_t,ssize_t,int,pb_bmap_t *,int *);
extern int xfs_iomap_read(xfs_iocore_t *, loff_t, size_t, int,
			  pb_bmap_t *, int *, struct pm *);
extern int xfs_iomap_write(xfs_iocore_t	*,loff_t,size_t,pb_bmap_t *,int *,int,struct pm *);

extern int xfs_is_read_only(xlog_t *);
extern void XFS_log_write_unmount_ro(bhv_desc_t	*);
/*
 * Needed by xfs_rw.c
 */

void
xfs_rwlock(
	bhv_desc_t	*bdp,
	vrwlock_t	write_lock);

void
xfs_rwlockf(
	bhv_desc_t	*bdp,
	vrwlock_t	write_lock,
	int		flags);

void
xfs_rwunlock(
	bhv_desc_t	*bdp,
	vrwlock_t	write_lock);

void
xfs_rwunlockf(
	bhv_desc_t	*bdp,
	vrwlock_t	write_lock,
	int		flags);

#if 0
page_buf_t *
xfs_pb_getr(
			int sleep, 
			xfs_mount_t *mp);
page_buf_t *
xfs_pb_ngetr(
			 int len, 
			 xfs_mount_t *mp);

void
xfs_pb_freer(
			 page_buf_t *bp); 
void
xfs_pb_nfreer(
			  page_buf_t *bp);
#endif

#define XFS_FSB_TO_DB_IO(io,fsb) \
		(((io)->io_flags & XFS_IOCORE_RT) ? \
		 XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
		 XFS_FSB_TO_DADDR((io)->io_mount, (fsb)))

#endif /* _XFS_LRW_H */