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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/smp_lock.h>
27#include <linux/buffer_head.h> /* for sync_mapping_buffers() */
28
29
30/*
31 * File may be NULL when we are called. Perhaps we shouldn't
32 * even pass file to fsync ?
33 */
34
35int ext2_sync_file(struct file *file, struct dentry *dentry, int datasync)
36{
37 struct inode *inode = dentry->d_inode;
38 int err;
39 int ret;
40
41 ret = sync_mapping_buffers(inode->i_mapping);
42 if (!(inode->i_state & I_DIRTY))
43 return ret;
44 if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
45 return ret;
46
47 err = ext2_sync_inode(inode);
48 if (ret == 0)
49 ret = err;
50 return ret;
51}