1/*
2 *  linux/fs/sysv/file.c
3 *
4 *  minix/file.c
5 *  Copyright (C) 1991, 1992  Linus Torvalds
6 *
7 *  coh/file.c
8 *  Copyright (C) 1993  Pascal Haible, Bruno Haible
9 *
10 *  sysv/file.c
11 *  Copyright (C) 1993  Bruno Haible
12 *
13 *  SystemV/Coherent regular file handling primitives
14 */
15
16#include "sysv.h"
17
18/*
19 * We have mostly NULLs here: the current defaults are OK for
20 * the coh filesystem.
21 */
22const struct file_operations sysv_file_operations = {
23	.llseek		= generic_file_llseek,
24	.read		= do_sync_read,
25	.aio_read	= generic_file_aio_read,
26	.write		= do_sync_write,
27	.aio_write	= generic_file_aio_write,
28	.mmap		= generic_file_mmap,
29	.fsync		= sysv_sync_file,
30	.sendfile	= generic_file_sendfile,
31};
32
33const struct inode_operations sysv_file_inode_operations = {
34	.truncate	= sysv_truncate,
35	.getattr	= sysv_getattr,
36};
37
38int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
39{
40	struct inode *inode = dentry->d_inode;
41	int err;
42
43	err = sync_mapping_buffers(inode->i_mapping);
44	if (!(inode->i_state & I_DIRTY))
45		return err;
46	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
47		return err;
48
49	err |= sysv_sync_inode(inode);
50	return err ? -EIO : 0;
51}
52