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