1/*
2 * Copyright (C) 2005, 2006
3 * Avishay Traeger (avishay@gmail.com)
4 * Copyright (C) 2008, 2009
5 * Boaz Harrosh <bharrosh@panasas.com>
6 *
7 * Copyrights for code taken from ext2:
8 *     Copyright (C) 1992, 1993, 1994, 1995
9 *     Remy Card (card@masi.ibp.fr)
10 *     Laboratoire MASI - Institut Blaise Pascal
11 *     Universite Pierre et Marie Curie (Paris VI)
12 *     from
13 *     linux/fs/minix/inode.c
14 *     Copyright (C) 1991, 1992  Linus Torvalds
15 *
16 * This file is part of exofs.
17 *
18 * exofs is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation.  Since it is based on ext2, and the only
21 * valid version of GPL for the Linux kernel is version 2, the only valid
22 * version of GPL for exofs is version 2.
23 *
24 * exofs is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with exofs; if not, write to the Free Software
31 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
32 */
33#include "exofs.h"
34
35static int exofs_release_file(struct inode *inode, struct file *filp)
36{
37	return 0;
38}
39
40/* exofs_file_fsync - flush the inode to disk
41 *
42 *   Note, in exofs all metadata is written as part of inode, regardless.
43 *   The writeout is synchronous
44 */
45static int exofs_file_fsync(struct file *filp, int datasync)
46{
47	int ret;
48	struct inode *inode = filp->f_mapping->host;
49	struct writeback_control wbc = {
50		.sync_mode = WB_SYNC_ALL,
51		.nr_to_write = 0, /* metadata-only; caller takes care of data */
52	};
53	struct super_block *sb;
54
55	if (!(inode->i_state & I_DIRTY))
56		return 0;
57	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
58		return 0;
59
60	ret = sync_inode(inode, &wbc);
61
62	/* This is a good place to write the sb */
63	/* TODO: Sechedule an sb-sync on create */
64	sb = inode->i_sb;
65	if (sb->s_dirt)
66		exofs_sync_fs(sb, 1);
67
68	return ret;
69}
70
71static int exofs_flush(struct file *file, fl_owner_t id)
72{
73	int ret = vfs_fsync(file, 0);
74	/* TODO: Flush the OSD target */
75	return ret;
76}
77
78const struct file_operations exofs_file_operations = {
79	.llseek		= generic_file_llseek,
80	.read		= do_sync_read,
81	.write		= do_sync_write,
82	.aio_read	= generic_file_aio_read,
83	.aio_write	= generic_file_aio_write,
84	.mmap		= generic_file_mmap,
85	.open		= generic_file_open,
86	.release	= exofs_release_file,
87	.fsync		= exofs_file_fsync,
88	.flush		= exofs_flush,
89	.splice_read	= generic_file_splice_read,
90	.splice_write	= generic_file_splice_write,
91};
92
93const struct inode_operations exofs_file_inode_operations = {
94	.setattr	= exofs_setattr,
95};
96