/* *  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 fsync_inode_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;}