/* -*- mode: c; c-basic-offset: 8; -*-
   * vim: noexpandtab sw=8 ts=8 sts=0:
   *
   * Copyright (C) 2002, 2004, 2005 Oracle.  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; 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 021110-1307, USA.
   */
  
  #ifndef OCFS2_AOPS_H
  #define OCFS2_AOPS_H

  int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
  			       unsigned from, unsigned to);

  handle_t *ocfs2_start_walk_page_trans(struct inode *inode,

  							 struct page *page,
  							 unsigned from,
  							 unsigned to);

  int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
  			  struct inode *inode, unsigned int from,
  			  unsigned int to, int new);
  
  int walk_page_buffers(	handle_t *handle,
  			struct buffer_head *head,
  			unsigned from,
  			unsigned to,
  			int *partial,
  			int (*fn)(	handle_t *handle,
  					struct buffer_head *bh));

  int ocfs2_write_begin(struct file *file, struct address_space *mapping,
  		      loff_t pos, unsigned len, unsigned flags,
  		      struct page **pagep, void **fsdata);

  int ocfs2_write_end(struct file *file, struct address_space *mapping,
  		    loff_t pos, unsigned len, unsigned copied,
  		    struct page *page, void *fsdata);

  int ocfs2_write_end_nolock(struct address_space *mapping,
  			   loff_t pos, unsigned len, unsigned copied,
  			   struct page *page, void *fsdata);
  
  int ocfs2_write_begin_nolock(struct address_space *mapping,
  			     loff_t pos, unsigned len, unsigned flags,
  			     struct page **pagep, void **fsdata,
  			     struct buffer_head *di_bh, struct page *mmap_page);

  /* all ocfs2_dio_end_io()'s fault */
  #define ocfs2_iocb_is_rw_locked(iocb) \
  	test_bit(0, (unsigned long *)&iocb->private)

  static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
  {
  	set_bit(0, (unsigned long *)&iocb->private);
  	if (level)
  		set_bit(1, (unsigned long *)&iocb->private);
  	else
  		clear_bit(1, (unsigned long *)&iocb->private);
  }

  #define ocfs2_iocb_clear_rw_locked(iocb) \
  	clear_bit(0, (unsigned long *)&iocb->private)

  #define ocfs2_iocb_rw_locked_level(iocb) \
  	test_bit(1, (unsigned long *)&iocb->private)

  #endif /* OCFS2_FILE_H */