1 files changed, 124 insertions, 0 deletions

diff --git a/fs/ocfs2/cluster/sys.c b/fs/ocfs2/cluster/sys.c
new file mode 100644
index 000000000000..1d9f6acafa2e
--- /dev/null
+++ b/fs/ocfs2/cluster/sys.c
@@ -0,0 +1,124 @@
+/* -*- 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_subsys(k) container_of(to_kset(k), struct subsystem, kset)
+#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, NULL);
+
+static ssize_t
+o2cb_show(struct kobject * kobj, struct attribute * attr, char * buffer)
+{
+        struct o2cb_attribute *o2cb_attr = to_o2cb_attr(attr);
+        struct subsystem *sbs = to_o2cb_subsys(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 subsystem *sbs = to_o2cb_subsys(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.kset.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;
+}