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 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 57 void o2cb_sys_shutdown(void) 58 { 59 mlog_sys_shutdown(); 60 kset_unregister(o2cb_kset); 61 } 62 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