| /* -*- 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_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); |
| |
| static ssize_t |
| o2cb_show(struct kobject * kobj, struct attribute * attr, char * buffer) |
| { |
| struct o2cb_attribute *o2cb_attr = to_o2cb_attr(attr); |
| struct kset *sbs = to_kset(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 kset *sbs = to_kset(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.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; |
| } |