1 // SPDX-License-Identifier: GPL-2.0-only
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * sys.c
6 *
7 * OCFS2 cluster sysfs interface
8 *
9 * Copyright (C) 2005 Oracle. All rights reserved.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/kobject.h>
15 #include <linux/sysfs.h>
16 #include <linux/fs.h>
17
18 #include "ocfs2_nodemanager.h"
19 #include "masklog.h"
20 #include "sys.h"
21
22
version_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)23 static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr,
24 char *buf)
25 {
26 return snprintf(buf, PAGE_SIZE, "%u\n", O2NM_API_VERSION);
27 }
28 static struct kobj_attribute attr_version =
29 __ATTR(interface_revision, S_IRUGO, version_show, NULL);
30
31 static struct attribute *o2cb_attrs[] = {
32 &attr_version.attr,
33 NULL,
34 };
35
36 static struct attribute_group o2cb_attr_group = {
37 .attrs = o2cb_attrs,
38 };
39
40 static struct kset *o2cb_kset;
41
o2cb_sys_shutdown(void)42 void o2cb_sys_shutdown(void)
43 {
44 mlog_sys_shutdown();
45 kset_unregister(o2cb_kset);
46 }
47
o2cb_sys_init(void)48 int o2cb_sys_init(void)
49 {
50 int ret;
51
52 o2cb_kset = kset_create_and_add("o2cb", NULL, fs_kobj);
53 if (!o2cb_kset)
54 return -ENOMEM;
55
56 ret = sysfs_create_group(&o2cb_kset->kobj, &o2cb_attr_group);
57 if (ret)
58 goto error;
59
60 ret = mlog_sys_init(o2cb_kset);
61 if (ret)
62 goto error;
63 return 0;
64 error:
65 kset_unregister(o2cb_kset);
66 return ret;
67 }
68