text: /* -*- 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_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();
  	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;
  
  	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;
  }
  