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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 "ocfs2_nodemanager.h"
#include "masklog.h"
#include "sys.h"
struct o2cb_attribute {
struct attribute attr;
ssize_t (*show)(char *buf);
ssize_t (*store)(const char *buf, size_t count);
};
#define O2CB_ATTR(_name, _mode, _show, _store) \
struct o2cb_attribute o2cb_attr_##_name = __ATTR(_name, _mode, _show, _store)
#define to_o2cb_subsys(k) container_of(to_kset(k), struct subsystem, kset)
#define to_o2cb_attr(_attr) container_of(_attr, struct o2cb_attribute, attr)
static ssize_t o2cb_interface_revision_show(char *buf)
{
return snprintf(buf, PAGE_SIZE, "%u\n", O2NM_API_VERSION);
}
static O2CB_ATTR(interface_revision, S_IFREG | S_IRUGO, o2cb_interface_revision_show, NULL);
static struct attribute *o2cb_attrs[] = {
&o2cb_attr_interface_revision.attr,
NULL,
};
static ssize_t
o2cb_show(struct kobject * kobj, struct attribute * attr, char * buffer);
static ssize_t
o2cb_store(struct kobject * kobj, struct attribute * attr,
const char * buffer, size_t count);
static struct sysfs_ops o2cb_sysfs_ops = {
.show = o2cb_show,
.store = o2cb_store,
};
static struct kobj_type o2cb_subsys_type = {
.default_attrs = o2cb_attrs,
.sysfs_ops = &o2cb_sysfs_ops,
};
/* gives us o2cb_subsys */
static decl_subsys(o2cb, NULL, NULL);
static ssize_t
o2cb_show(struct kobject * kobj, struct attribute * attr, char * buffer)
{
struct o2cb_attribute *o2cb_attr = to_o2cb_attr(attr);
struct subsystem *sbs = to_o2cb_subsys(kobj);
BUG_ON(sbs != &o2cb_subsys);
if (o2cb_attr->show)
return o2cb_attr->show(buffer);
return -EIO;
}
static ssize_t
o2cb_store(struct kobject * kobj, struct attribute * attr,
const char * buffer, size_t count)
{
struct o2cb_attribute *o2cb_attr = to_o2cb_attr(attr);
struct subsystem *sbs = to_o2cb_subsys(kobj);
BUG_ON(sbs != &o2cb_subsys);
if (o2cb_attr->store)
return o2cb_attr->store(buffer, count);
return -EIO;
}
void o2cb_sys_shutdown(void)
{
mlog_sys_shutdown();
subsystem_unregister(&o2cb_subsys);
}
int o2cb_sys_init(void)
{
int ret;
o2cb_subsys.kset.kobj.ktype = &o2cb_subsys_type;
ret = subsystem_register(&o2cb_subsys);
if (ret)
return ret;
ret = mlog_sys_init(&o2cb_subsys);
if (ret)
subsystem_unregister(&o2cb_subsys);
return ret;
}
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