1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sys.c
4 *
5 * OCFS2 cluster sysfs interface
6 *
7 * Copyright (C) 2005 Oracle.  All rights reserved.
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/kobject.h>
13#include <linux/sysfs.h>
14#include <linux/fs.h>
15
16#include "ocfs2_nodemanager.h"
17#include "masklog.h"
18#include "sys.h"
19
20
21static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr,
22			    char *buf)
23{
24	return snprintf(buf, PAGE_SIZE, "%u\n", O2NM_API_VERSION);
25}
26static struct kobj_attribute attr_version =
27	__ATTR(interface_revision, S_IRUGO, version_show, NULL);
28
29static struct attribute *o2cb_attrs[] = {
30	&attr_version.attr,
31	NULL,
32};
33
34static struct attribute_group o2cb_attr_group = {
35	.attrs = o2cb_attrs,
36};
37
38static struct kset *o2cb_kset;
39
40void o2cb_sys_shutdown(void)
41{
42	mlog_sys_shutdown();
43	kset_unregister(o2cb_kset);
44}
45
46int o2cb_sys_init(void)
47{
48	int ret;
49
50	o2cb_kset = kset_create_and_add("o2cb", NULL, fs_kobj);
51	if (!o2cb_kset)
52		return -ENOMEM;
53
54	ret = sysfs_create_group(&o2cb_kset->kobj, &o2cb_attr_group);
55	if (ret)
56		goto error;
57
58	ret = mlog_sys_init(o2cb_kset);
59	if (ret)
60		goto error;
61	return 0;
62error:
63	kset_unregister(o2cb_kset);
64	return ret;
65}
66