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
21 static 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 }
26 static struct kobj_attribute attr_version =
27 __ATTR(interface_revision, S_IRUGO, version_show, NULL);
28
29 static struct attribute *o2cb_attrs[] = {
30 &attr_version.attr,
31 NULL,
32 };
33
34 static struct attribute_group o2cb_attr_group = {
35 .attrs = o2cb_attrs,
36 };
37
38 static struct kset *o2cb_kset;
39
40 void o2cb_sys_shutdown(void)
41 {
42 mlog_sys_shutdown();
43 kset_unregister(o2cb_kset);
44 }
45
46 int 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;
62 error:
63 kset_unregister(o2cb_kset);
64 return ret;
65 }
66
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