1 // SPDX-License-Identifier: GPL-2.0-only 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * sys.c 6 * 7 * OCFS2 cluster sysfs interface 8 * 9 * Copyright (C) 2005 Oracle. All rights reserved. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/kobject.h> 15 #include <linux/sysfs.h> 16 #include <linux/fs.h> 17 18 #include "ocfs2_nodemanager.h" 19 #include "masklog.h" 20 #include "sys.h" 21 22 23 static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr, 24 char *buf) 25 { 26 return snprintf(buf, PAGE_SIZE, "%u\n", O2NM_API_VERSION); 27 } 28 static struct kobj_attribute attr_version = 29 __ATTR(interface_revision, S_IRUGO, version_show, NULL); 30 31 static struct attribute *o2cb_attrs[] = { 32 &attr_version.attr, 33 NULL, 34 }; 35 36 static struct attribute_group o2cb_attr_group = { 37 .attrs = o2cb_attrs, 38 }; 39 40 static struct kset *o2cb_kset; 41 42 void o2cb_sys_shutdown(void) 43 { 44 mlog_sys_shutdown(); 45 kset_unregister(o2cb_kset); 46 } 47 48 int o2cb_sys_init(void) 49 { 50 int ret; 51 52 o2cb_kset = kset_create_and_add("o2cb", NULL, fs_kobj); 53 if (!o2cb_kset) 54 return -ENOMEM; 55 56 ret = sysfs_create_group(&o2cb_kset->kobj, &o2cb_attr_group); 57 if (ret) 58 goto error; 59 60 ret = mlog_sys_init(o2cb_kset); 61 if (ret) 62 goto error; 63 return 0; 64 error: 65 kset_unregister(o2cb_kset); 66 return ret; 67 } 68