1/*
2 *  linux/fs/ext2/fsync.c
3 *
4 *  Copyright (C) 1993  Stephen Tweedie (sct@dcs.ed.ac.uk)
5 *  from
6 *  Copyright (C) 1992  Remy Card (card@masi.ibp.fr)
7 *                      Laboratoire MASI - Institut Blaise Pascal
8 *                      Universite Pierre et Marie Curie (Paris VI)
9 *  from
10 *  linux/fs/minix/truncate.c   Copyright (C) 1991, 1992  Linus Torvalds
11 *
12 *  ext2fs fsync primitive
13 *
14 *  Big-endian to little-endian byte-swapping/bitmaps by
15 *        David S. Miller (davem@caip.rutgers.edu), 1995
16 *
17 *  Removed unnecessary code duplication for little endian machines
18 *  and excessive __inline__s.
19 *        Andi Kleen, 1997
20 *
21 * Major simplications and cleanup - we only need to do the metadata, because
22 * we can depend on generic_block_fdatasync() to sync the data blocks.
23 */
24
25#include "ext2.h"
26#include <linux/buffer_head.h>		/* for sync_mapping_buffers() */
27
28
29/*
30 *	File may be NULL when we are called. Perhaps we shouldn't
31 *	even pass file to fsync ?
32 */
33
34int ext2_sync_file(struct file *file, struct dentry *dentry, int datasync)
35{
36	struct inode *inode = dentry->d_inode;
37	int err;
38	int ret;
39
40	ret = sync_mapping_buffers(inode->i_mapping);
41	if (!(inode->i_state & I_DIRTY))
42		return ret;
43	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
44		return ret;
45
46	err = ext2_sync_inode(inode);
47	if (ret == 0)
48		ret = err;
49	return ret;
50}
51