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