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![Alex Shi](/assets/img/avatar_default.png)
This macro is unused since commit ab09203e30
("sysctl fs: Remove dead
binary sysctl support").
Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Link: http://lkml.kernel.org/r/1579577812-251572-1-git-send-email-alex.shi@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
737 lines
17 KiB
C
737 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* -*- 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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* stackglue.c
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*
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* Code which implements an OCFS2 specific interface to underlying
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* cluster stacks.
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*
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* Copyright (C) 2007, 2009 Oracle. All rights reserved.
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*/
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/kmod.h>
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#include <linux/fs.h>
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#include <linux/kobject.h>
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#include <linux/sysfs.h>
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#include <linux/sysctl.h>
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#include "ocfs2_fs.h"
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#include "stackglue.h"
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#define OCFS2_STACK_PLUGIN_O2CB "o2cb"
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#define OCFS2_STACK_PLUGIN_USER "user"
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#define OCFS2_MAX_HB_CTL_PATH 256
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static struct ocfs2_protocol_version locking_max_version;
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static DEFINE_SPINLOCK(ocfs2_stack_lock);
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static LIST_HEAD(ocfs2_stack_list);
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static char cluster_stack_name[OCFS2_STACK_LABEL_LEN + 1];
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static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl";
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/*
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* The stack currently in use. If not null, active_stack->sp_count > 0,
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* the module is pinned, and the locking protocol cannot be changed.
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*/
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static struct ocfs2_stack_plugin *active_stack;
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static struct ocfs2_stack_plugin *ocfs2_stack_lookup(const char *name)
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{
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struct ocfs2_stack_plugin *p;
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assert_spin_locked(&ocfs2_stack_lock);
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list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
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if (!strcmp(p->sp_name, name))
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return p;
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}
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return NULL;
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}
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static int ocfs2_stack_driver_request(const char *stack_name,
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const char *plugin_name)
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{
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int rc;
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struct ocfs2_stack_plugin *p;
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spin_lock(&ocfs2_stack_lock);
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/*
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* If the stack passed by the filesystem isn't the selected one,
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* we can't continue.
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*/
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if (strcmp(stack_name, cluster_stack_name)) {
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rc = -EBUSY;
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goto out;
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}
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if (active_stack) {
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/*
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* If the active stack isn't the one we want, it cannot
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* be selected right now.
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*/
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if (!strcmp(active_stack->sp_name, plugin_name))
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rc = 0;
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else
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rc = -EBUSY;
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goto out;
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}
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p = ocfs2_stack_lookup(plugin_name);
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if (!p || !try_module_get(p->sp_owner)) {
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rc = -ENOENT;
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goto out;
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}
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active_stack = p;
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rc = 0;
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out:
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/* If we found it, pin it */
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if (!rc)
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active_stack->sp_count++;
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spin_unlock(&ocfs2_stack_lock);
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return rc;
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}
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/*
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* This function looks up the appropriate stack and makes it active. If
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* there is no stack, it tries to load it. It will fail if the stack still
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* cannot be found. It will also fail if a different stack is in use.
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*/
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static int ocfs2_stack_driver_get(const char *stack_name)
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{
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int rc;
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char *plugin_name = OCFS2_STACK_PLUGIN_O2CB;
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/*
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* Classic stack does not pass in a stack name. This is
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* compatible with older tools as well.
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*/
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if (!stack_name || !*stack_name)
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stack_name = OCFS2_STACK_PLUGIN_O2CB;
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if (strlen(stack_name) != OCFS2_STACK_LABEL_LEN) {
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printk(KERN_ERR
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"ocfs2 passed an invalid cluster stack label: \"%s\"\n",
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stack_name);
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return -EINVAL;
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}
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/* Anything that isn't the classic stack is a user stack */
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if (strcmp(stack_name, OCFS2_STACK_PLUGIN_O2CB))
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plugin_name = OCFS2_STACK_PLUGIN_USER;
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rc = ocfs2_stack_driver_request(stack_name, plugin_name);
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if (rc == -ENOENT) {
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request_module("ocfs2_stack_%s", plugin_name);
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rc = ocfs2_stack_driver_request(stack_name, plugin_name);
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}
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if (rc == -ENOENT) {
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printk(KERN_ERR
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"ocfs2: Cluster stack driver \"%s\" cannot be found\n",
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plugin_name);
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} else if (rc == -EBUSY) {
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printk(KERN_ERR
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"ocfs2: A different cluster stack is in use\n");
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}
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return rc;
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}
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static void ocfs2_stack_driver_put(void)
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{
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spin_lock(&ocfs2_stack_lock);
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BUG_ON(active_stack == NULL);
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BUG_ON(active_stack->sp_count == 0);
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active_stack->sp_count--;
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if (!active_stack->sp_count) {
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module_put(active_stack->sp_owner);
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active_stack = NULL;
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}
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spin_unlock(&ocfs2_stack_lock);
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}
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int ocfs2_stack_glue_register(struct ocfs2_stack_plugin *plugin)
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{
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int rc;
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spin_lock(&ocfs2_stack_lock);
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if (!ocfs2_stack_lookup(plugin->sp_name)) {
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plugin->sp_count = 0;
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plugin->sp_max_proto = locking_max_version;
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list_add(&plugin->sp_list, &ocfs2_stack_list);
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printk(KERN_INFO "ocfs2: Registered cluster interface %s\n",
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plugin->sp_name);
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rc = 0;
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} else {
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printk(KERN_ERR "ocfs2: Stack \"%s\" already registered\n",
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plugin->sp_name);
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rc = -EEXIST;
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}
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spin_unlock(&ocfs2_stack_lock);
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return rc;
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}
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EXPORT_SYMBOL_GPL(ocfs2_stack_glue_register);
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void ocfs2_stack_glue_unregister(struct ocfs2_stack_plugin *plugin)
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{
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struct ocfs2_stack_plugin *p;
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spin_lock(&ocfs2_stack_lock);
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p = ocfs2_stack_lookup(plugin->sp_name);
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if (p) {
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BUG_ON(p != plugin);
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BUG_ON(plugin == active_stack);
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BUG_ON(plugin->sp_count != 0);
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list_del_init(&plugin->sp_list);
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printk(KERN_INFO "ocfs2: Unregistered cluster interface %s\n",
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plugin->sp_name);
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} else {
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printk(KERN_ERR "Stack \"%s\" is not registered\n",
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plugin->sp_name);
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}
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spin_unlock(&ocfs2_stack_lock);
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}
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EXPORT_SYMBOL_GPL(ocfs2_stack_glue_unregister);
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void ocfs2_stack_glue_set_max_proto_version(struct ocfs2_protocol_version *max_proto)
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{
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struct ocfs2_stack_plugin *p;
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spin_lock(&ocfs2_stack_lock);
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if (memcmp(max_proto, &locking_max_version,
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sizeof(struct ocfs2_protocol_version))) {
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BUG_ON(locking_max_version.pv_major != 0);
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locking_max_version = *max_proto;
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list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
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p->sp_max_proto = locking_max_version;
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}
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}
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spin_unlock(&ocfs2_stack_lock);
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}
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EXPORT_SYMBOL_GPL(ocfs2_stack_glue_set_max_proto_version);
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/*
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* The ocfs2_dlm_lock() and ocfs2_dlm_unlock() functions take no argument
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* for the ast and bast functions. They will pass the lksb to the ast
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* and bast. The caller can wrap the lksb with their own structure to
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* get more information.
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*/
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int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
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int mode,
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struct ocfs2_dlm_lksb *lksb,
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u32 flags,
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void *name,
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unsigned int namelen)
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{
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if (!lksb->lksb_conn)
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lksb->lksb_conn = conn;
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else
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BUG_ON(lksb->lksb_conn != conn);
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return active_stack->sp_ops->dlm_lock(conn, mode, lksb, flags,
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name, namelen);
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}
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EXPORT_SYMBOL_GPL(ocfs2_dlm_lock);
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int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
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struct ocfs2_dlm_lksb *lksb,
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u32 flags)
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{
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BUG_ON(lksb->lksb_conn == NULL);
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return active_stack->sp_ops->dlm_unlock(conn, lksb, flags);
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}
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EXPORT_SYMBOL_GPL(ocfs2_dlm_unlock);
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int ocfs2_dlm_lock_status(struct ocfs2_dlm_lksb *lksb)
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{
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return active_stack->sp_ops->lock_status(lksb);
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}
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EXPORT_SYMBOL_GPL(ocfs2_dlm_lock_status);
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int ocfs2_dlm_lvb_valid(struct ocfs2_dlm_lksb *lksb)
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{
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return active_stack->sp_ops->lvb_valid(lksb);
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}
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EXPORT_SYMBOL_GPL(ocfs2_dlm_lvb_valid);
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void *ocfs2_dlm_lvb(struct ocfs2_dlm_lksb *lksb)
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{
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return active_stack->sp_ops->lock_lvb(lksb);
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}
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EXPORT_SYMBOL_GPL(ocfs2_dlm_lvb);
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void ocfs2_dlm_dump_lksb(struct ocfs2_dlm_lksb *lksb)
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{
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active_stack->sp_ops->dump_lksb(lksb);
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}
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EXPORT_SYMBOL_GPL(ocfs2_dlm_dump_lksb);
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int ocfs2_stack_supports_plocks(void)
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{
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return active_stack && active_stack->sp_ops->plock;
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}
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EXPORT_SYMBOL_GPL(ocfs2_stack_supports_plocks);
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/*
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* ocfs2_plock() can only be safely called if
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* ocfs2_stack_supports_plocks() returned true
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*/
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int ocfs2_plock(struct ocfs2_cluster_connection *conn, u64 ino,
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struct file *file, int cmd, struct file_lock *fl)
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{
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WARN_ON_ONCE(active_stack->sp_ops->plock == NULL);
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if (active_stack->sp_ops->plock)
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return active_stack->sp_ops->plock(conn, ino, file, cmd, fl);
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return -EOPNOTSUPP;
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}
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EXPORT_SYMBOL_GPL(ocfs2_plock);
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int ocfs2_cluster_connect(const char *stack_name,
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const char *cluster_name,
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int cluster_name_len,
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const char *group,
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int grouplen,
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struct ocfs2_locking_protocol *lproto,
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void (*recovery_handler)(int node_num,
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void *recovery_data),
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void *recovery_data,
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struct ocfs2_cluster_connection **conn)
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{
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int rc = 0;
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struct ocfs2_cluster_connection *new_conn;
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BUG_ON(group == NULL);
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BUG_ON(conn == NULL);
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BUG_ON(recovery_handler == NULL);
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if (grouplen > GROUP_NAME_MAX) {
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rc = -EINVAL;
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goto out;
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}
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if (memcmp(&lproto->lp_max_version, &locking_max_version,
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sizeof(struct ocfs2_protocol_version))) {
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rc = -EINVAL;
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goto out;
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}
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new_conn = kzalloc(sizeof(struct ocfs2_cluster_connection),
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GFP_KERNEL);
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if (!new_conn) {
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rc = -ENOMEM;
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goto out;
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}
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strlcpy(new_conn->cc_name, group, GROUP_NAME_MAX + 1);
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new_conn->cc_namelen = grouplen;
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if (cluster_name_len)
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strlcpy(new_conn->cc_cluster_name, cluster_name,
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CLUSTER_NAME_MAX + 1);
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new_conn->cc_cluster_name_len = cluster_name_len;
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new_conn->cc_recovery_handler = recovery_handler;
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new_conn->cc_recovery_data = recovery_data;
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new_conn->cc_proto = lproto;
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/* Start the new connection at our maximum compatibility level */
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new_conn->cc_version = lproto->lp_max_version;
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/* This will pin the stack driver if successful */
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rc = ocfs2_stack_driver_get(stack_name);
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if (rc)
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goto out_free;
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rc = active_stack->sp_ops->connect(new_conn);
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if (rc) {
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ocfs2_stack_driver_put();
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goto out_free;
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}
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*conn = new_conn;
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out_free:
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if (rc)
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kfree(new_conn);
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out:
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return rc;
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}
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EXPORT_SYMBOL_GPL(ocfs2_cluster_connect);
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/* The caller will ensure all nodes have the same cluster stack */
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int ocfs2_cluster_connect_agnostic(const char *group,
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int grouplen,
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struct ocfs2_locking_protocol *lproto,
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void (*recovery_handler)(int node_num,
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void *recovery_data),
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void *recovery_data,
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struct ocfs2_cluster_connection **conn)
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{
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char *stack_name = NULL;
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if (cluster_stack_name[0])
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stack_name = cluster_stack_name;
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return ocfs2_cluster_connect(stack_name, NULL, 0, group, grouplen,
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lproto, recovery_handler, recovery_data,
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conn);
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}
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EXPORT_SYMBOL_GPL(ocfs2_cluster_connect_agnostic);
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/* If hangup_pending is 0, the stack driver will be dropped */
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int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn,
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int hangup_pending)
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{
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int ret;
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BUG_ON(conn == NULL);
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ret = active_stack->sp_ops->disconnect(conn);
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/* XXX Should we free it anyway? */
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if (!ret) {
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kfree(conn);
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if (!hangup_pending)
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ocfs2_stack_driver_put();
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(ocfs2_cluster_disconnect);
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/*
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* Leave the group for this filesystem. This is executed by a userspace
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* program (stored in ocfs2_hb_ctl_path).
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*/
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static void ocfs2_leave_group(const char *group)
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{
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int ret;
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char *argv[5], *envp[3];
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argv[0] = ocfs2_hb_ctl_path;
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argv[1] = "-K";
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argv[2] = "-u";
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argv[3] = (char *)group;
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argv[4] = NULL;
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/* minimal command environment taken from cpu_run_sbin_hotplug */
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envp[0] = "HOME=/";
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envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
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envp[2] = NULL;
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ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
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if (ret < 0) {
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printk(KERN_ERR
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"ocfs2: Error %d running user helper "
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"\"%s %s %s %s\"\n",
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ret, argv[0], argv[1], argv[2], argv[3]);
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}
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}
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/*
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* Hangup is a required post-umount. ocfs2-tools software expects the
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* filesystem to call "ocfs2_hb_ctl" during unmount. This happens
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* regardless of whether the DLM got started, so we can't do it
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* in ocfs2_cluster_disconnect(). The ocfs2_leave_group() function does
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* the actual work.
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*/
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void ocfs2_cluster_hangup(const char *group, int grouplen)
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{
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BUG_ON(group == NULL);
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BUG_ON(group[grouplen] != '\0');
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ocfs2_leave_group(group);
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/* cluster_disconnect() was called with hangup_pending==1 */
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ocfs2_stack_driver_put();
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}
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EXPORT_SYMBOL_GPL(ocfs2_cluster_hangup);
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int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *conn,
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unsigned int *node)
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{
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return active_stack->sp_ops->this_node(conn, node);
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}
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EXPORT_SYMBOL_GPL(ocfs2_cluster_this_node);
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/*
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* Sysfs bits
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*/
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static ssize_t ocfs2_max_locking_protocol_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *buf)
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{
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ssize_t ret = 0;
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spin_lock(&ocfs2_stack_lock);
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if (locking_max_version.pv_major)
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ret = snprintf(buf, PAGE_SIZE, "%u.%u\n",
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locking_max_version.pv_major,
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locking_max_version.pv_minor);
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spin_unlock(&ocfs2_stack_lock);
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return ret;
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}
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static struct kobj_attribute ocfs2_attr_max_locking_protocol =
|
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__ATTR(max_locking_protocol, S_IRUGO,
|
|
ocfs2_max_locking_protocol_show, NULL);
|
|
|
|
static ssize_t ocfs2_loaded_cluster_plugins_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ssize_t ret = 0, total = 0, remain = PAGE_SIZE;
|
|
struct ocfs2_stack_plugin *p;
|
|
|
|
spin_lock(&ocfs2_stack_lock);
|
|
list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
|
|
ret = snprintf(buf, remain, "%s\n",
|
|
p->sp_name);
|
|
if (ret < 0) {
|
|
total = ret;
|
|
break;
|
|
}
|
|
if (ret == remain) {
|
|
/* snprintf() didn't fit */
|
|
total = -E2BIG;
|
|
break;
|
|
}
|
|
total += ret;
|
|
remain -= ret;
|
|
}
|
|
spin_unlock(&ocfs2_stack_lock);
|
|
|
|
return total;
|
|
}
|
|
|
|
static struct kobj_attribute ocfs2_attr_loaded_cluster_plugins =
|
|
__ATTR(loaded_cluster_plugins, S_IRUGO,
|
|
ocfs2_loaded_cluster_plugins_show, NULL);
|
|
|
|
static ssize_t ocfs2_active_cluster_plugin_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ssize_t ret = 0;
|
|
|
|
spin_lock(&ocfs2_stack_lock);
|
|
if (active_stack) {
|
|
ret = snprintf(buf, PAGE_SIZE, "%s\n",
|
|
active_stack->sp_name);
|
|
if (ret == PAGE_SIZE)
|
|
ret = -E2BIG;
|
|
}
|
|
spin_unlock(&ocfs2_stack_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct kobj_attribute ocfs2_attr_active_cluster_plugin =
|
|
__ATTR(active_cluster_plugin, S_IRUGO,
|
|
ocfs2_active_cluster_plugin_show, NULL);
|
|
|
|
static ssize_t ocfs2_cluster_stack_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ssize_t ret;
|
|
spin_lock(&ocfs2_stack_lock);
|
|
ret = snprintf(buf, PAGE_SIZE, "%s\n", cluster_stack_name);
|
|
spin_unlock(&ocfs2_stack_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_cluster_stack_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
size_t len = count;
|
|
ssize_t ret;
|
|
|
|
if (len == 0)
|
|
return len;
|
|
|
|
if (buf[len - 1] == '\n')
|
|
len--;
|
|
|
|
if ((len != OCFS2_STACK_LABEL_LEN) ||
|
|
(strnlen(buf, len) != len))
|
|
return -EINVAL;
|
|
|
|
spin_lock(&ocfs2_stack_lock);
|
|
if (active_stack) {
|
|
if (!strncmp(buf, cluster_stack_name, len))
|
|
ret = count;
|
|
else
|
|
ret = -EBUSY;
|
|
} else {
|
|
memcpy(cluster_stack_name, buf, len);
|
|
ret = count;
|
|
}
|
|
spin_unlock(&ocfs2_stack_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static struct kobj_attribute ocfs2_attr_cluster_stack =
|
|
__ATTR(cluster_stack, S_IRUGO | S_IWUSR,
|
|
ocfs2_cluster_stack_show,
|
|
ocfs2_cluster_stack_store);
|
|
|
|
|
|
|
|
static ssize_t ocfs2_dlm_recover_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return snprintf(buf, PAGE_SIZE, "1\n");
|
|
}
|
|
|
|
static struct kobj_attribute ocfs2_attr_dlm_recover_support =
|
|
__ATTR(dlm_recover_callback_support, S_IRUGO,
|
|
ocfs2_dlm_recover_show, NULL);
|
|
|
|
static struct attribute *ocfs2_attrs[] = {
|
|
&ocfs2_attr_max_locking_protocol.attr,
|
|
&ocfs2_attr_loaded_cluster_plugins.attr,
|
|
&ocfs2_attr_active_cluster_plugin.attr,
|
|
&ocfs2_attr_cluster_stack.attr,
|
|
&ocfs2_attr_dlm_recover_support.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group ocfs2_attr_group = {
|
|
.attrs = ocfs2_attrs,
|
|
};
|
|
|
|
struct kset *ocfs2_kset;
|
|
EXPORT_SYMBOL_GPL(ocfs2_kset);
|
|
|
|
static void ocfs2_sysfs_exit(void)
|
|
{
|
|
kset_unregister(ocfs2_kset);
|
|
}
|
|
|
|
static int ocfs2_sysfs_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ocfs2_kset = kset_create_and_add("ocfs2", NULL, fs_kobj);
|
|
if (!ocfs2_kset)
|
|
return -ENOMEM;
|
|
|
|
ret = sysfs_create_group(&ocfs2_kset->kobj, &ocfs2_attr_group);
|
|
if (ret)
|
|
goto error;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
kset_unregister(ocfs2_kset);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Sysctl bits
|
|
*
|
|
* The sysctl lives at /proc/sys/fs/ocfs2/nm/hb_ctl_path. The 'nm' doesn't
|
|
* make as much sense in a multiple cluster stack world, but it's safer
|
|
* and easier to preserve the name.
|
|
*/
|
|
|
|
static struct ctl_table ocfs2_nm_table[] = {
|
|
{
|
|
.procname = "hb_ctl_path",
|
|
.data = ocfs2_hb_ctl_path,
|
|
.maxlen = OCFS2_MAX_HB_CTL_PATH,
|
|
.mode = 0644,
|
|
.proc_handler = proc_dostring,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table ocfs2_mod_table[] = {
|
|
{
|
|
.procname = "nm",
|
|
.data = NULL,
|
|
.maxlen = 0,
|
|
.mode = 0555,
|
|
.child = ocfs2_nm_table
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table ocfs2_kern_table[] = {
|
|
{
|
|
.procname = "ocfs2",
|
|
.data = NULL,
|
|
.maxlen = 0,
|
|
.mode = 0555,
|
|
.child = ocfs2_mod_table
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table ocfs2_root_table[] = {
|
|
{
|
|
.procname = "fs",
|
|
.data = NULL,
|
|
.maxlen = 0,
|
|
.mode = 0555,
|
|
.child = ocfs2_kern_table
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table_header *ocfs2_table_header;
|
|
|
|
|
|
/*
|
|
* Initialization
|
|
*/
|
|
|
|
static int __init ocfs2_stack_glue_init(void)
|
|
{
|
|
strcpy(cluster_stack_name, OCFS2_STACK_PLUGIN_O2CB);
|
|
|
|
ocfs2_table_header = register_sysctl_table(ocfs2_root_table);
|
|
if (!ocfs2_table_header) {
|
|
printk(KERN_ERR
|
|
"ocfs2 stack glue: unable to register sysctl\n");
|
|
return -ENOMEM; /* or something. */
|
|
}
|
|
|
|
return ocfs2_sysfs_init();
|
|
}
|
|
|
|
static void __exit ocfs2_stack_glue_exit(void)
|
|
{
|
|
memset(&locking_max_version, 0,
|
|
sizeof(struct ocfs2_protocol_version));
|
|
ocfs2_sysfs_exit();
|
|
if (ocfs2_table_header)
|
|
unregister_sysctl_table(ocfs2_table_header);
|
|
}
|
|
|
|
MODULE_AUTHOR("Oracle");
|
|
MODULE_DESCRIPTION("ocfs2 cluter stack glue layer");
|
|
MODULE_LICENSE("GPL");
|
|
module_init(ocfs2_stack_glue_init);
|
|
module_exit(ocfs2_stack_glue_exit);
|