text: /*
   *  linux/fs/ext2/fsync.c
   *
   *  Copyright (C) 1993  Stephen Tweedie (sct@dcs.ed.ac.uk)
   *  from
   *  Copyright (C) 1992  Remy Card (card@masi.ibp.fr)
   *                      Laboratoire MASI - Institut Blaise Pascal
   *                      Universite Pierre et Marie Curie (Paris VI)
   *  from
   *  linux/fs/minix/truncate.c   Copyright (C) 1991, 1992  Linus Torvalds
   * 
   *  ext2fs fsync primitive
   *
   *  Big-endian to little-endian byte-swapping/bitmaps by
   *        David S. Miller (davem@caip.rutgers.edu), 1995
   * 
   *  Removed unnecessary code duplication for little endian machines
   *  and excessive __inline__s. 
   *        Andi Kleen, 1997
   *
   * Major simplications and cleanup - we only need to do the metadata, because
   * we can depend on generic_block_fdatasync() to sync the data blocks.
   */
  
  #include "ext2.h"
  #include <linux/smp_lock.h>
  #include <linux/buffer_head.h>		/* for sync_mapping_buffers() */
  
  
  /*
   *	File may be NULL when we are called. Perhaps we shouldn't
   *	even pass file to fsync ?
   */
  
  int ext2_sync_file(struct file *file, struct dentry *dentry, int datasync)
  {
  	struct inode *inode = dentry->d_inode;
  	int err;
  	int ret;
  
  	ret = sync_mapping_buffers(inode->i_mapping);
  	if (!(inode->i_state & I_DIRTY))
  		return ret;
  	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
  		return ret;
  
  	err = ext2_sync_inode(inode);
  	if (ret == 0)
  		ret = err;
  	return ret;
  }
  