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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* sys.c
*
* OCFS2 cluster sysfs interface
*
* Copyright (C) 2005 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation,
* version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/sysfs.h>
#include <linux/fs.h>
#include "ocfs2_nodemanager.h"
#include "masklog.h"
#include "sys.h"
static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%u\n", O2NM_API_VERSION);
}
static struct kobj_attribute attr_version =
__ATTR(interface_revision, S_IFREG | S_IRUGO, version_show, NULL);
static struct attribute *o2cb_attrs[] = {
&attr_version.attr,
NULL,
};
static struct attribute_group o2cb_attr_group = {
.attrs = o2cb_attrs,
};
static struct kset *o2cb_kset;
void o2cb_sys_shutdown(void)
{
mlog_sys_shutdown();
sysfs_remove_link(NULL, "o2cb");
kset_unregister(o2cb_kset);
}
int o2cb_sys_init(void)
{
int ret;
o2cb_kset = kset_create_and_add("o2cb", NULL, fs_kobj);
if (!o2cb_kset)
return -ENOMEM;
/*
* Create this symlink for backwards compatibility with old
* versions of ocfs2-tools which look for things in /sys/o2cb.
*/
ret = sysfs_create_link(NULL, &o2cb_kset->kobj, "o2cb");
if (ret)
goto error;
ret = sysfs_create_group(&o2cb_kset->kobj, &o2cb_attr_group);
if (ret)
goto error;
ret = mlog_sys_init(o2cb_kset);
if (ret)
goto error;
return 0;
error:
kset_unregister(o2cb_kset);
return ret;
}
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