1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * sys.c
5 *
6 * OCFS2 cluster sysfs interface
7 *
8 * Copyright (C) 2005 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation,
13 * version 2 of the License.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 *
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/kobject.h>
30 #include <linux/sysfs.h>
31 #include <linux/fs.h>
32
33 #include "ocfs2_nodemanager.h"
34 #include "masklog.h"
35 #include "sys.h"
36
37
version_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)38 static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr,
39 char *buf)
40 {
41 return snprintf(buf, PAGE_SIZE, "%u\n", O2NM_API_VERSION);
42 }
43 static struct kobj_attribute attr_version =
44 __ATTR(interface_revision, S_IFREG | S_IRUGO, version_show, NULL);
45
46 static struct attribute *o2cb_attrs[] = {
47 &attr_version.attr,
48 NULL,
49 };
50
51 static struct attribute_group o2cb_attr_group = {
52 .attrs = o2cb_attrs,
53 };
54
55 static struct kset *o2cb_kset;
56
o2cb_sys_shutdown(void)57 void o2cb_sys_shutdown(void)
58 {
59 mlog_sys_shutdown();
60 kset_unregister(o2cb_kset);
61 }
62
o2cb_sys_init(void)63 int o2cb_sys_init(void)
64 {
65 int ret;
66
67 o2cb_kset = kset_create_and_add("o2cb", NULL, fs_kobj);
68 if (!o2cb_kset)
69 return -ENOMEM;
70
71 ret = sysfs_create_group(&o2cb_kset->kobj, &o2cb_attr_group);
72 if (ret)
73 goto error;
74
75 ret = mlog_sys_init(o2cb_kset);
76 if (ret)
77 goto error;
78 return 0;
79 error:
80 kset_unregister(o2cb_kset);
81 return ret;
82 }
83